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data-v-0d424459></span><span class="menu-text" data-v-0d424459>Menu</span></button><div class="VPLocalNavOutlineDropdown" style="--vp-vh:0px;" data-v-0d424459 data-v-9e866da0><button data-v-9e866da0>Return to top</button><!----></div></div></div><aside class="VPSidebar" data-v-52085faa data-v-b300e040><div class="curtain" data-v-b300e040></div><nav class="nav" id="VPSidebarNav" aria-labelledby="sidebar-aria-label" tabindex="-1" data-v-b300e040><span class="visually-hidden" id="sidebar-aria-label" data-v-b300e040> Sidebar Navigation </span><!--[--><!--]--><!--[--><div class="no-transition group" data-v-cd5b1edc><section class="VPSidebarItem level-0 has-active" data-v-cd5b1edc data-v-edbe517d><div class="item" role="button" tabindex="0" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><h2 class="text" data-v-edbe517d>编辑器</h2><!----></div><div class="items" data-v-edbe517d><!--[--><section class="VPSidebarItem level-1" data-v-edbe517d data-v-edbe517d><div class="item" role="button" tabindex="0" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><h3 class="text" data-v-edbe517d>Editor组件</h3><!----></div><div class="items" data-v-edbe517d><!--[--><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/editor/props.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>props</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/editor/slots.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>slots</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/editor/events.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>events</p><!--]--></a><!----></div><!----></div><!--]--></div></section><section class="VPSidebarItem level-1" data-v-edbe517d data-v-edbe517d><div class="item" role="button" tabindex="0" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><h3 class="text" data-v-edbe517d>editorService</h3><!----></div><div class="items" data-v-edbe517d><!--[--><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/editor/editorServiceMethods.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>方法</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/editor/editorServiceEvents.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>事件</p><!--]--></a><!----></div><!----></div><!--]--></div></section><section class="VPSidebarItem level-1" data-v-edbe517d data-v-edbe517d><div class="item" role="button" tabindex="0" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><h3 class="text" data-v-edbe517d>propsService</h3><!----></div><div class="items" data-v-edbe517d><!--[--><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/editor/propsServiceMethods.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>方法</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/editor/propsServiceEvents.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>事件</p><!--]--></a><!----></div><!----></div><!--]--></div></section><section class="VPSidebarItem level-1 has-active" data-v-edbe517d data-v-edbe517d><div class="item" role="button" tabindex="0" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><h3 class="text" data-v-edbe517d>historyService</h3><!----></div><div class="items" data-v-edbe517d><!--[--><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/editor/historyServiceMethods.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>方法</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/editor/historyServiceEvents.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>事件</p><!--]--></a><!----></div><!----></div><!--]--></div></section><div class="VPSidebarItem level-1 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/editor/eventsServiceMethods.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>eventsService</p><!--]--></a><!----></div><!----></div><section class="VPSidebarItem level-1" data-v-edbe517d data-v-edbe517d><div class="item" role="button" tabindex="0" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><h3 class="text" data-v-edbe517d>uiService</h3><!----></div><div class="items" data-v-edbe517d><!--[--><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/editor/uiServiceMethods.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>方法</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/editor/uiServiceEvents.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>事件</p><!--]--></a><!----></div><!----></div><!--]--></div></section><div class="VPSidebarItem level-1 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/editor/codeBlockServiceMethods.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>codeBlockService</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/editor/componentListServiceMethods.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>componentListService</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-1 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/editor/storageServiceMethods.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>storageService</p><!--]--></a><!----></div><!----></div><!--]--></div></section></div><div class="no-transition group" data-v-cd5b1edc><section class="VPSidebarItem level-0" data-v-cd5b1edc data-v-edbe517d><div class="item" role="button" tabindex="0" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><h2 class="text" data-v-edbe517d>表单</h2><!----></div><div class="items" data-v-edbe517d><!--[--><section class="VPSidebarItem level-1" data-v-edbe517d data-v-edbe517d><div class="item" role="button" tabindex="0" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><h3 class="text" data-v-edbe517d>Form组件</h3><!----></div><div class="items" data-v-edbe517d><!--[--><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/form/form-props.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>props</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/form/form-methods.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>methods</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/form/form-events.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>events</p><!--]--></a><!----></div><!----></div><!--]--></div></section><section class="VPSidebarItem level-1" data-v-edbe517d data-v-edbe517d><div class="item" role="button" tabindex="0" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><h3 class="text" data-v-edbe517d>FormDialog组件</h3><!----></div><div class="items" data-v-edbe517d><!--[--><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/form/form-dialog-props.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>props</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/form/form-dialog-methods.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>methods</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/form/form-dialog-events.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>events</p><!--]--></a><!----></div><!----></div><!--]--></div></section><section class="VPSidebarItem level-1" data-v-edbe517d data-v-edbe517d><div class="item" role="button" tabindex="0" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><h3 class="text" data-v-edbe517d>工具函数</h3><!----></div><div class="items" data-v-edbe517d><!--[--><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/form/submit-form.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>submitForm</p><!--]--></a><!----></div><!----></div><!--]--></div></section><!--]--></div></section></div><div class="no-transition group" data-v-cd5b1edc><section class="VPSidebarItem level-0" data-v-cd5b1edc data-v-edbe517d><div class="item" role="button" tabindex="0" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><h2 class="text" data-v-edbe517d>表格</h2><!----></div><div class="items" data-v-edbe517d><!--[--><section class="VPSidebarItem level-1" data-v-edbe517d data-v-edbe517d><div class="item" role="button" tabindex="0" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><h3 class="text" data-v-edbe517d>Table组件</h3><!----></div><div class="items" data-v-edbe517d><!--[--><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/table/props.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>props</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/table/methods.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>methods</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/table/events.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>events</p><!--]--></a><!----></div><!----></div><!--]--></div></section><!--]--></div></section></div><div class="no-transition group" data-v-cd5b1edc><section class="VPSidebarItem level-0" data-v-cd5b1edc data-v-edbe517d><div class="item" role="button" tabindex="0" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><h2 class="text" data-v-edbe517d>stage</h2><!----></div><div class="items" data-v-edbe517d><!--[--><section class="VPSidebarItem level-1" data-v-edbe517d data-v-edbe517d><div class="item" role="button" tabindex="0" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><h3 class="text" data-v-edbe517d>StageCore</h3><!----></div><div class="items" data-v-edbe517d><!--[--><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/stage/coreMethods.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>方法</p><!--]--></a><!----></div><!----></div><div class="VPSidebarItem level-2 is-link" data-v-edbe517d data-v-edbe517d><div class="item" data-v-edbe517d><div class="indicator" data-v-edbe517d></div><a class="VPLink link link" href="/tmagic-editor/docs/api/stage/coreEvents.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>事件</p><!--]--></a><!----></div><!----></div><!--]--></div></section><!--]--></div></section></div><!--]--><!--[--><!--]--></nav></aside><div class="VPContent has-sidebar" id="VPContent" data-v-52085faa data-v-e4a435e4><div class="VPDoc has-sidebar has-aside" data-v-e4a435e4 data-v-e240b221><!--[--><!--]--><div class="container" data-v-e240b221><div class="aside" data-v-e240b221><div class="aside-curtain" data-v-e240b221></div><div class="aside-container" data-v-e240b221><div class="aside-content" data-v-e240b221><div class="VPDocAside" data-v-e240b221 data-v-29ae77ab><!--[--><!--]--><!--[--><!--]--><nav aria-labelledby="doc-outline-aria-label" class="VPDocAsideOutline" data-v-29ae77ab data-v-9a0a5036><div class="content" data-v-9a0a5036><div class="outline-marker" data-v-9a0a5036></div><div aria-level="2" class="outline-title" id="doc-outline-aria-label" role="heading" data-v-9a0a5036>On this page</div><ul class="VPDocOutlineItem root" data-v-9a0a5036 data-v-97ea2a1e><!--[--><!--]--></ul></div></nav><!--[--><!--]--><div class="spacer" data-v-29ae77ab></div><!--[--><!--]--><!----><!--[--><!--]--><!--[--><!--]--></div></div></div></div><div class="content" data-v-e240b221><div class="content-container" data-v-e240b221><!--[--><!--]--><main class="main" data-v-e240b221><div style="position:relative;" class="vp-doc _tmagic-editor_docs_api_editor_historyServiceEvents" data-v-e240b221><div><h1 id="historyservice事件" tabindex="-1">historyService事件 <a class="header-anchor" href="#historyservice事件" aria-label="Permalink to “historyService事件”">​</a></h1><h2 id="page-change" tabindex="-1">page-change <a class="header-anchor" href="#page-change" aria-label="Permalink to “page-change”">​</a></h2><ul><li><p><strong>详情：</strong> 页面切换</p></li><li><p><strong>事件回调函数：</strong> <code>(undoRedo: UndoRedo) =&gt; void</code></p><details class="details custom-block"><summary>查看 UndoRedo 类定义</summary><div class="language-ts"><button title="Copy Code" class="copy"></button><span class="lang">ts</span><pre class="shiki shiki-themes github-light github-dark" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0" dir="ltr"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">export</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> class</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> UndoRedo</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">T</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> any</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt; {</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /**</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 由 </span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">{</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">@link</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> UndoRedo.serialize</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">}</span><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> 产出的快照重建一个 UndoRedo 实例。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 游标会被夹紧到 [0, length] 区间，避免脏数据导致越界。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> *</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">@param</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> options.isSavedStep</span><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> 可选谓词：若提供，则把游标定位到「最近一条满足该谓词的记录」之后</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * （即恢复到最近一个已保存点）；找不到匹配记录时退回快照中的原游标。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> */</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> public</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> static</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> fromSerialized</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">T</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> any</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt;(</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> data</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> SerializedUndoRedo</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">T</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt;,</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> options</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> { </span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">isSavedStep</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">?:</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> (</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">element</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> T</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=&gt;</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> boolean</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> } </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {},</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> )</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> UndoRedo</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">T</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt; {</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> const</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> undoRedo</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> new</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> UndoRedo</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">T</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt;(data.listMaxSize);</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> const</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> list</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> Array.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">isArray</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(data.elementList) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">?</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> data.elementList.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">map</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">((</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">item</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=&gt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> cloneDeep</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(item)) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> [];</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> let</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> cursor </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> Number.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">isFinite</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(data.listCursor) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">?</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> data.listCursor </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> list.</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">length</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> // 本地数据同样遵循容量上限：超出时裁掉最旧的记录（与 pushElement 的 shift 行为一致），并同步回退游标。</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> const</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> overflow</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> list.</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">length</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> -</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> undoRedo.listMaxSize;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> if</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> (overflow </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">&gt;</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 0</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) {</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> list.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">splice</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">0</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, overflow);</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> cursor </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">-=</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> overflow;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> // 若指定了「已保存」谓词，则把游标移动到最近一条已保存记录之后；在裁剪后的 list 上查找以保证索引正确。</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> if</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> (options.isSavedStep) {</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> for</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> (</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">let</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> i </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> list.</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">length</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> -</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 1</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">; i </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">&gt;=</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 0</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">; i</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">--</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) {</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> if</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> (options.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">isSavedStep</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(list[i])) {</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> cursor </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> i </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">+</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 1</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> break</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> undoRedo.elementList </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> list;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> undoRedo.listCursor </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> Math.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">max</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">0</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, Math.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">min</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(cursor, list.</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">length</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">));</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> return</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> undoRedo;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> private</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> elementList</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> T</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">[];</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> private</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> listCursor</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> private</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> listMaxSize</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> constructor</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">listMaxSize</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 100</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) {</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> const</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> minListMaxSize</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 2</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.elementList </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> [];</span></span>
<span class="line"><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listCursor </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 0</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listMaxSize </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> listMaxSize </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">&gt;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> minListMaxSize </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">?</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> listMaxSize </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> minListMaxSize;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /**</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 导出当前栈的可序列化快照（深克隆，避免外部改动污染内部状态）。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 配合 </span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">{</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">@link</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> UndoRedo.fromSerialized</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">}</span><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> 可在持久化后完整还原撤销/重做栈。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> */</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> public</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> serialize</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> SerializedUndoRedo</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">T</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt; {</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> return</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> elementList: </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.elementList.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">map</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">((</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">item</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=&gt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> cloneDeep</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(item)),</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> listCursor: </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listCursor,</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> listMaxSize: </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listMaxSize,</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> };</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> public</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> pushElement</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">element</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> T</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> void</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> // 新元素进来时，把游标之外的元素全部丢弃，并把新元素放进来</span></span>
<span class="line"><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.elementList.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">splice</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listCursor, </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.elementList.</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">length</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> -</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listCursor, </span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">cloneDeep</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(element));</span></span>
<span class="line"><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listCursor </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">+=</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 1</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> // 如果list中的元素超过maxSize，则移除第一个元素</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> if</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> (</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.elementList.</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">length</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> &gt;</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listMaxSize) {</span></span>
<span class="line"><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.elementList.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">shift</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">();</span></span>
<span class="line"><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listCursor </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">-=</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 1</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> public</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> canUndo</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> boolean</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> return</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listCursor </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">&gt;</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 0</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 返回被撤销的操作 */</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> public</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> undo</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> T</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> null</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> if</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> (</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">!</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">canUndo</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()) {</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> return</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> null</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listCursor </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">-=</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 1</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> return</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> cloneDeep</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.elementList[</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listCursor]);</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> public</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> canRedo</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">() {</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> return</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.elementList.</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">length</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> &gt;</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listCursor;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 返回被重做的操作 */</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> public</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> redo</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> T</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> null</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> if</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> (</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">!</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">canRedo</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()) {</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> return</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> null</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> const</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> element</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> cloneDeep</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.elementList[</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listCursor]);</span></span>
<span class="line"><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listCursor </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">+=</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 1</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> return</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> element;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> public</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> getCurrentElement</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> T</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> null</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> if</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> (</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listCursor </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">&lt;</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 1</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) {</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> return</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> null</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> return</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> cloneDeep</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.elementList[</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listCursor </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">-</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 1</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">]);</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /**</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 用 `element` 替换当前游标所在元素（cursor - 1），并丢弃其后的重做尾部（与 </span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">{</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">@link</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> pushElement</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">}</span><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> 的丢尾一致），</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 游标位置保持不变（元素数量不增）。cursor 为 0（无已应用元素）时不做任何操作并返回 false。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 用于「连续同类记录合并」等就地替换最新一条的场景。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> */</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> public</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> replaceCurrentElement</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">element</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> T</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> boolean</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> if</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> (</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listCursor </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">&lt;</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 1</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">return</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> false</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.elementList.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">splice</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listCursor </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">-</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 1</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.elementList.</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">length</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> -</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> (</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listCursor </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">-</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 1</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">), </span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">cloneDeep</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(element));</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> return</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> true</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /**</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 对当前游标所在元素（cursor - 1）做就地更新；cursor 为 0（全部已撤销）时不做任何操作。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 用于给「当前步骤」打标记（如标记为已保存）等元数据写入场景。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> */</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> public</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> updateCurrentElement</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">updater</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> (</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">element</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> T</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=&gt;</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> void</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> void</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> if</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> (</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listCursor </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">&lt;</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 1</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">return</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> updater</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.elementList[</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listCursor </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">-</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> 1</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">]);</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 对栈内全部元素做就地更新。用于批量清理元数据（如清空所有元素的已保存标记）。 */</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> public</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> updateElements</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">updater</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> (</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">element</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> T</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">index</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=&gt;</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> void</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">)</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> void</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.elementList.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">forEach</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">(updater);</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /**</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 返回栈内全部元素的浅克隆数组（按时间顺序，索引 0 为最早一步）。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 仅用于历史面板等只读展示场景，不应直接修改返回值。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> */</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> public</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> getElementList</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> T</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">[] {</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> return</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.elementList.</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">slice</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">();</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /**</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 当前游标位置：表示已应用的步骤数量。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - cursor === 0 表示全部已撤销</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - cursor === length 表示已重做到末尾</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 历史面板用于区分&quot;已应用 / 已撤销&quot;两段。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> */</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> public</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> getCursor</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> return</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.listCursor;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 栈内总步数。 */</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> public</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> getLength</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">()</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> return</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> this</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">.elementList.</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">length</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> }</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span></code></pre></div></details></li></ul><h2 id="change" tabindex="-1">change <a class="header-anchor" href="#change" aria-label="Permalink to “change”">​</a></h2><ul><li><p><strong>详情：</strong> 历史记录发生变化</p></li><li><p><strong>事件回调函数：</strong> <code>(state: StepValue | null) =&gt; void</code></p><details class="details custom-block"><summary>查看 StepValue 及关联类型定义</summary><div class="language-ts"><button title="Copy Code" class="copy"></button><span class="lang">ts</span><pre class="shiki shiki-themes github-light github-dark" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0" dir="ltr"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">export</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> interface</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> StepValue</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> extends</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> BaseStepValue</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">MNode</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt; {</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 页面信息 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> data</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> { </span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">name</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> string</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">; </span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">id</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Id</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> };</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 操作前选中的节点 ID，用于撤销后恢复选择状态 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> selectedBefore</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Id</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">[];</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 操作后选中的节点 ID，用于重做后恢复选择状态 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> selectedAfter</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Id</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">[];</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> modifiedNodeIds</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Map</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">Id</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">Id</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt;;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span></code></pre></div><div class="language-ts"><button title="Copy Code" class="copy"></button><span class="lang">ts</span><pre class="shiki shiki-themes github-light github-dark" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0" dir="ltr"><code><span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">/**</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 历史记录操作类型：</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `add` / `remove` / `update`：普通可撤销/重做的节点变更；</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `initial`：页面「未修改的初始状态」基线（设置 root 时生成），作为页面栈 index 0 的固定底线 step。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 该 step 不可被撤销/回滚（cursor 不会低于它），仅用于历史面板底部的初始行展示。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> */</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">export</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> type</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> HistoryOpType</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;add&#39;</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;remove&#39;</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;update&#39;</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;initial&#39;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span></code></pre></div><div class="language-ts"><button title="Copy Code" class="copy"></button><span class="lang">ts</span><pre class="shiki shiki-themes github-light github-dark" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0" dir="ltr"><code><span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">/**</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 历史记录的「操作途径」——标记本次变更由哪条交互入口触发，仅用于历史面板展示 / 业务埋点，</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 不影响 undo/redo 行为。缺省（未传）时 UI 视为「未知」。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> *</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `stage`：画布（拖拽 / 缩放 / 排序等舞台直接操作）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `tree`：树形面板（图层 / 数据源 / 代码块等树形结构里的拖拽 / 菜单操作）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `component-panel`：组件面板（左侧组件列表点击 / 拖拽新增组件）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `props`：配置面板表单（属性表单字段编辑）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `code`：源码编辑器（配置面板「源码」面板里直接编辑 JSON/代码后保存）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `stage-contextmenu`：画布右键菜单（舞台上节点的右键上下文菜单）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `tree-contextmenu`：树面板右键菜单（图层 / 数据源 / 代码块等树形列表上的右键上下文菜单）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `toolbar`：工具栏菜单（顶部导航工具栏按钮）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `shortcut`：键盘快捷键</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `rollback`：历史回滚（历史面板里对某条历史「回滚」，反向应用为一条新记录，类 git revert）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `api`：代码 / 接口调用（程序化触发）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `ai`：AI 生成 / 智能助手触发的变更</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `unknown`：未知来源</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> *</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 通过 `(string &amp; {})` 允许业务侧扩展自定义途径字符串，同时保留内置值的自动补全。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> */</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">export</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> type</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> HistoryOpSource</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;initial&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;stage&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;tree&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;component-panel&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;props&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;code&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;root-code&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;stage-contextmenu&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;tree-contextmenu&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;toolbar&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;shortcut&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;rollback&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;api&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;ai&#39;</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> // 同步</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;sync&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;unknown&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> (</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">string</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> &amp;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {});</span></span></code></pre></div><div class="language-ts"><button title="Copy Code" class="copy"></button><span class="lang">ts</span><pre class="shiki shiki-themes github-light github-dark" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0" dir="ltr"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">export</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> type</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Id</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> string</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span></code></pre></div><div class="language-ts"><button title="Copy Code" class="copy"></button><span class="lang">ts</span><pre class="shiki shiki-themes github-light github-dark" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0" dir="ltr"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">export</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> type</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> MNode</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> MComponent</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> MContainer</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> MIteratorContainer</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> MPage</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> MApp</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> MPageFragment</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span></code></pre></div></details><div class="tip custom-block"><p class="custom-block-title custom-block-title-default">TIP</p><p>当游标处于历史栈边界（已经无法继续撤销或重做）时，<code>UndoRedo.undo()</code> / <code>redo()</code> 返回 <code>null</code>，对应 <code>change</code> 回调收到的 <code>state</code> 为 <code>null</code></p></div></li></ul><h2 id="code-block-history-change" tabindex="-1">code-block-history-change <a class="header-anchor" href="#code-block-history-change" aria-label="Permalink to “code-block-history-change”">​</a></h2><ul><li><p><strong>详情：</strong> 代码块历史记录发生变化（<code>pushCodeBlock</code> / <code>undoCodeBlock</code> / <code>redoCodeBlock</code> 成功时触发）</p></li><li><p><strong>事件回调函数：</strong> <code>(codeBlockId: Id, step: CodeBlockStepValue) =&gt; void</code></p><details class="details custom-block"><summary>查看 CodeBlockStepValue 及关联类型定义</summary><div class="language-ts"><button title="Copy Code" class="copy"></button><span class="lang">ts</span><pre class="shiki shiki-themes github-light github-dark" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0" dir="ltr"><code><span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">/**</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 代码块历史记录条目。按 codeBlock.id 分组保存到 historyState.codeBlockState。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 变更内容统一由 `diff`（单项）表达，每项见 </span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">{</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">@link</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> StepDiffItem</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">}</span><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">：</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - 新增（opType &#39;add&#39;）：仅 `newSchema`（新内容）；</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - 更新（opType &#39;update&#39;）：`oldSchema` + `newSchema`，并可带 `changeRecords` 做局部更新；</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - 删除（opType &#39;remove&#39;）：仅 `oldSchema`（删除前内容）。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> */</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">export</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> interface</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> CodeBlockStepValue</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> extends</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> BaseStepValue</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">CodeBlockContent</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt; {</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 关联的代码块 id */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> id</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Id</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span></code></pre></div><div class="language-ts"><button title="Copy Code" class="copy"></button><span class="lang">ts</span><pre class="shiki shiki-themes github-light github-dark" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0" dir="ltr"><code><span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">/**</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 历史记录的「操作途径」——标记本次变更由哪条交互入口触发，仅用于历史面板展示 / 业务埋点，</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 不影响 undo/redo 行为。缺省（未传）时 UI 视为「未知」。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> *</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `stage`：画布（拖拽 / 缩放 / 排序等舞台直接操作）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `tree`：树形面板（图层 / 数据源 / 代码块等树形结构里的拖拽 / 菜单操作）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `component-panel`：组件面板（左侧组件列表点击 / 拖拽新增组件）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `props`：配置面板表单（属性表单字段编辑）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `code`：源码编辑器（配置面板「源码」面板里直接编辑 JSON/代码后保存）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `stage-contextmenu`：画布右键菜单（舞台上节点的右键上下文菜单）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `tree-contextmenu`：树面板右键菜单（图层 / 数据源 / 代码块等树形列表上的右键上下文菜单）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `toolbar`：工具栏菜单（顶部导航工具栏按钮）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `shortcut`：键盘快捷键</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `rollback`：历史回滚（历史面板里对某条历史「回滚」，反向应用为一条新记录，类 git revert）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `api`：代码 / 接口调用（程序化触发）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `ai`：AI 生成 / 智能助手触发的变更</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `unknown`：未知来源</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> *</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 通过 `(string &amp; {})` 允许业务侧扩展自定义途径字符串，同时保留内置值的自动补全。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> */</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">export</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> type</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> HistoryOpSource</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;initial&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;stage&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;tree&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;component-panel&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;props&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;code&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;root-code&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;stage-contextmenu&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;tree-contextmenu&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;toolbar&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;shortcut&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;rollback&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;api&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;ai&#39;</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> // 同步</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;sync&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;unknown&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> (</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">string</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> &amp;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {});</span></span></code></pre></div><div class="language-ts"><button title="Copy Code" class="copy"></button><span class="lang">ts</span><pre class="shiki shiki-themes github-light github-dark" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0" dir="ltr"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">export</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> interface</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> CodeBlockContent</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 代码块名称 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> name</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> string</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 代码块内容 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> content</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> ((</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">...</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">args</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> any</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">[]) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">=&gt;</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> any</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">) </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">|</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Function</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 参数定义 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> params</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> CodeParam</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">[] </span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">|</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> [];</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 注释 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> desc</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">?:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> string</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 扩展字段 */</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> [</span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">propName</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> string</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">]</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> any</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span></code></pre></div><div class="language-ts"><button title="Copy Code" class="copy"></button><span class="lang">ts</span><pre class="shiki shiki-themes github-light github-dark" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0" dir="ltr"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">export</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> type</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Id</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> string</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span></code></pre></div></details><div class="tip custom-block"><p class="custom-block-title custom-block-title-default">TIP</p><ul><li>新增触发的 step 中 <code>oldContent</code> 为 <code>null</code></li><li>删除触发的 step 中 <code>newContent</code> 为 <code>null</code></li><li><code>undo</code> / <code>redo</code> 返回 <code>null</code>（边界状态）时不会触发该事件</li></ul></div></li></ul><h2 id="data-source-history-change" tabindex="-1">data-source-history-change <a class="header-anchor" href="#data-source-history-change" aria-label="Permalink to “data-source-history-change”">​</a></h2><ul><li><p><strong>详情：</strong> 数据源历史记录发生变化（<code>pushDataSource</code> / <code>undoDataSource</code> / <code>redoDataSource</code> 成功时触发）</p></li><li><p><strong>事件回调函数：</strong> <code>(dataSourceId: Id, step: DataSourceStepValue) =&gt; void</code></p><details class="details custom-block"><summary>查看 DataSourceStepValue 及关联类型定义</summary><div class="language-ts"><button title="Copy Code" class="copy"></button><span class="lang">ts</span><pre class="shiki shiki-themes github-light github-dark" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0" dir="ltr"><code><span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">/**</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 数据源历史记录条目。按 dataSource.id 分组保存到 historyState.dataSourceState。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 变更内容统一由 `diff`（单项）表达，每项见 </span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">{</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">@link</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> StepDiffItem</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">}</span><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">：</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - 新增（opType &#39;add&#39;）：仅 `newSchema`（新 schema）；</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - 更新（opType &#39;update&#39;）：`oldSchema` + `newSchema`，并可带 `changeRecords` 做局部更新；</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - 删除（opType &#39;remove&#39;）：仅 `oldSchema`（删除前 schema）。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> */</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">export</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> interface</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> DataSourceStepValue</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> extends</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> BaseStepValue</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">DataSourceSchema</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt; {</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 关联的数据源 id */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> id</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Id</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span></code></pre></div><div class="language-ts"><button title="Copy Code" class="copy"></button><span class="lang">ts</span><pre class="shiki shiki-themes github-light github-dark" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0" dir="ltr"><code><span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">/**</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 历史记录的「操作途径」——标记本次变更由哪条交互入口触发，仅用于历史面板展示 / 业务埋点，</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 不影响 undo/redo 行为。缺省（未传）时 UI 视为「未知」。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> *</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `stage`：画布（拖拽 / 缩放 / 排序等舞台直接操作）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `tree`：树形面板（图层 / 数据源 / 代码块等树形结构里的拖拽 / 菜单操作）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `component-panel`：组件面板（左侧组件列表点击 / 拖拽新增组件）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `props`：配置面板表单（属性表单字段编辑）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `code`：源码编辑器（配置面板「源码」面板里直接编辑 JSON/代码后保存）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `stage-contextmenu`：画布右键菜单（舞台上节点的右键上下文菜单）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `tree-contextmenu`：树面板右键菜单（图层 / 数据源 / 代码块等树形列表上的右键上下文菜单）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `toolbar`：工具栏菜单（顶部导航工具栏按钮）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `shortcut`：键盘快捷键</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `rollback`：历史回滚（历史面板里对某条历史「回滚」，反向应用为一条新记录，类 git revert）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `api`：代码 / 接口调用（程序化触发）</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `ai`：AI 生成 / 智能助手触发的变更</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - `unknown`：未知来源</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> *</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 通过 `(string &amp; {})` 允许业务侧扩展自定义途径字符串，同时保留内置值的自动补全。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> */</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">export</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> type</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> HistoryOpSource</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;initial&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;stage&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;tree&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;component-panel&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;props&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;code&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;root-code&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;stage-contextmenu&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;tree-contextmenu&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;toolbar&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;shortcut&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;rollback&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;api&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;ai&#39;</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> // 同步</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;sync&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#032F62;--shiki-dark:#9ECBFF;"> &#39;unknown&#39;</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> (</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">string</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> &amp;</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {});</span></span></code></pre></div><div class="language-ts"><button title="Copy Code" class="copy"></button><span class="lang">ts</span><pre class="shiki shiki-themes github-light github-dark" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0" dir="ltr"><code><span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">export</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> type</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Id</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> string</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> |</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span></code></pre></div></details><div class="tip custom-block"><p class="custom-block-title custom-block-title-default">TIP</p><ul><li>新增触发的 step 中 <code>oldSchema</code> 为 <code>null</code></li><li>删除触发的 step 中 <code>newSchema</code> 为 <code>null</code></li><li><code>undo</code> / <code>redo</code> 返回 <code>null</code>（边界状态）时不会触发该事件</li></ul></div></li></ul><h2 id="mark-saved" tabindex="-1">mark-saved <a class="header-anchor" href="#mark-saved" aria-label="Permalink to “mark-saved”">​</a></h2><ul><li><p><strong>详情：</strong> 调用 <code>markSaved</code> / <code>markPageSaved</code> / <code>markCodeBlockSaved</code> / <code>markDataSourceSaved</code> 标记「已保存」记录时触发</p></li><li><p><strong>事件回调函数：</strong> <code>(payload: { kind: &#39;all&#39; | &#39;page&#39; | &#39;code-block&#39; | &#39;data-source&#39;; id?: Id }) =&gt; void</code></p><div class="tip custom-block"><p class="custom-block-title custom-block-title-default">TIP</p><ul><li><code>markSaved</code> 触发时 <code>kind</code> 为 <code>all</code>，无 <code>id</code></li><li>细粒度方法触发时 <code>kind</code> 对应类别，<code>id</code> 为目标页面 / 代码块 / 数据源 id</li></ul></div></li></ul><h2 id="save-to-indexed-db" tabindex="-1">save-to-indexed-db <a class="header-anchor" href="#save-to-indexed-db" aria-label="Permalink to “save-to-indexed-db”">​</a></h2><ul><li><p><strong>详情：</strong> <code>saveToIndexedDB</code> 把历史记录写入本地 IndexedDB 成功时触发</p></li><li><p><strong>事件回调函数：</strong> <code>(snapshot: PersistedHistoryState) =&gt; void</code></p><details class="details custom-block"><summary>查看 PersistedHistoryState 类型定义</summary><div class="language-ts"><button title="Copy Code" class="copy"></button><span class="lang">ts</span><pre class="shiki shiki-themes github-light github-dark" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0" dir="ltr"><code><span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">/**</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 历史记录的可持久化快照。由 historyService.saveToIndexedDB 写入 IndexedDB，</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 再由 historyService.restoreFromIndexedDB 读出并重建各 UndoRedo 栈。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> */</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">export</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> interface</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> PersistedHistoryState</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 快照结构版本号，便于后续兼容升级。 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> version</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 保存时的活动页 id。 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> pageId</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">?:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Id</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 各页面历史栈的序列化快照，按 pageId 分组。 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> pageSteps</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Record</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">Id</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">SerializedUndoRedo</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">StepValue</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt;&gt;;</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 各代码块历史栈的序列化快照，按 codeBlockId 分组。 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> codeBlockState</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Record</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">Id</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">SerializedUndoRedo</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">CodeBlockStepValue</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt;&gt;;</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 各数据源历史栈的序列化快照，按 dataSourceId 分组。 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> dataSourceState</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Record</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">Id</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">SerializedUndoRedo</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">DataSourceStepValue</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt;&gt;;</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 保存时间戳（毫秒）。 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> savedAt</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span></code></pre></div><div class="language-ts"><button title="Copy Code" class="copy"></button><span class="lang">ts</span><pre class="shiki shiki-themes github-light github-dark" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0" dir="ltr"><code><span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">/**</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * UndoRedo 栈的可序列化快照，用于持久化（如写入 IndexedDB）后再还原。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> */</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">export</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> interface</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> SerializedUndoRedo</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">T</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> =</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> any</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt; {</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 栈内全部元素（按时间正序，索引 0 为最早一步）。 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> elementList</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> T</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">[];</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 游标位置（已应用步骤数量）。 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> listCursor</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 栈容量上限。 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> listMaxSize</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span></code></pre></div></details></li></ul><h2 id="restore-from-indexed-db" tabindex="-1">restore-from-indexed-db <a class="header-anchor" href="#restore-from-indexed-db" aria-label="Permalink to “restore-from-indexed-db”">​</a></h2><ul><li><p><strong>详情：</strong> <code>restoreFromIndexedDB</code> 从本地 IndexedDB 读取并重建历史记录成功时触发（找不到记录时不触发）</p></li><li><p><strong>事件回调函数：</strong> <code>(snapshot: PersistedHistoryState) =&gt; void</code></p><details class="details custom-block"><summary>查看 PersistedHistoryState 类型定义</summary><div class="language-ts"><button title="Copy Code" class="copy"></button><span class="lang">ts</span><pre class="shiki shiki-themes github-light github-dark" style="--shiki-light:#24292e;--shiki-dark:#e1e4e8;--shiki-light-bg:#fff;--shiki-dark-bg:#24292e;" tabindex="0" dir="ltr"><code><span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;">/**</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 历史记录的可持久化快照。由 historyService.saveToIndexedDB 写入 IndexedDB，</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 再由 historyService.restoreFromIndexedDB 读出并重建各 UndoRedo 栈。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> */</span></span>
<span class="line"><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">export</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;"> interface</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> PersistedHistoryState</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;"> {</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 快照结构版本号，便于后续兼容升级。 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> version</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 保存时的活动页 id。 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> pageId</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">?:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Id</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 各页面历史栈的序列化快照，按 pageId 分组。 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> pageSteps</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Record</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">Id</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">SerializedUndoRedo</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">StepValue</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt;&gt;;</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 各代码块历史栈的序列化快照，按 codeBlockId 分组。 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> codeBlockState</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Record</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">Id</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">SerializedUndoRedo</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">CodeBlockStepValue</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt;&gt;;</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 各数据源历史栈的序列化快照，按 dataSourceId 分组。 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> dataSourceState</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> Record</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">Id</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">SerializedUndoRedo</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&lt;</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;">DataSourceStepValue</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt;&gt;;</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 保存时间戳（毫秒）。 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> savedAt</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;"> number</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">;</span></span>
<span class="line"><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">}</span></span></code></pre></div></details></li></ul></div></div></main><footer class="VPDocFooter" data-v-e240b221 data-v-5ee03efa><!--[--><!--]--><!----><nav class="prev-next" aria-labelledby="doc-footer-aria-label" data-v-5ee03efa><span class="visually-hidden" id="doc-footer-aria-label" data-v-5ee03efa>Pager</span><div class="pager" data-v-5ee03efa><a class="VPLink link pager-link prev" href="/tmagic-editor/docs/api/editor/historyServiceMethods.html" data-v-5ee03efa><!--[--><span class="desc" data-v-5ee03efa>Previous page</span><span class="title" data-v-5ee03efa>方法</span><!--]--></a></div><div class="pager" data-v-5ee03efa><a class="VPLink link pager-link next" href="/tmagic-editor/docs/api/editor/eventsServiceMethods.html" data-v-5ee03efa><!--[--><span class="desc" data-v-5ee03efa>Next page</span><span class="title" data-v-5ee03efa>eventsService</span><!--]--></a></div></nav></footer><!--[--><!--]--></div></div></div><!--[--><!--]--></div></div><footer class="VPFooter has-sidebar" data-v-52085faa data-v-b8960fa3><div class="container" data-v-b8960fa3><p class="message" data-v-b8960fa3>Powered by 腾讯视频会员平台技术中心</p><p class="copyright" data-v-b8960fa3>Copyright (C) 2025 Tencent.</p></div></footer><!--[--><!--]--></div></div>
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