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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><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/uiServiceMethods.html" data-v-edbe517d><!--[--><p class="text" data-v-edbe517d>uiService</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/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:#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:#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;"> * 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:#24292E;--shiki-dark:#E1E4E8;"> {</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:#E36209;--shiki-dark:#FFAB70;"> opType</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> HistoryOpType</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:#6A737D;--shiki-dark:#6A737D;"> /** opType &#39;add&#39;: 新增的节点 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> nodes</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">?:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> MNode</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">[];</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** opType &#39;add&#39;: 父节点 ID */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> parentId</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;"> /** opType &#39;add&#39;: 每个新增节点在父节点 items 中的索引 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> indexMap</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:#005CC5;--shiki-dark:#79B8FF;">string</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">, </span><span style="--shiki-light:#005CC5;--shiki-dark:#79B8FF;">number</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">&gt;;</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** opType &#39;remove&#39;: 被删除的节点及其位置信息 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> removedItems</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;">node</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> MNode</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">; </span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">parentId</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 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>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /**</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * opType &#39;update&#39;: 变更前后的节点快照</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;"> * `changeRecords` 来自 form 端的 propPath/value 列表，撤销/重做时只对这些 propPath 做局部更新；</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 缺省（未传 / 空数组）才退化为整节点替换。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> updatedItems</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;">oldNode</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> MNode</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">; </span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">newNode</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> MNode</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">; </span><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;">changeRecords</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">?:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> ChangeRecord</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">[] }[];</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;"> * 调用方可选传入的人类可读描述（如「调整按钮颜色」），用于历史面板展示。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 不影响 undo/redo 行为；缺省时面板会根据节点 / propPath 自动生成描述。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> historyDescription</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:#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;"> 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:#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;"> * - 新增：oldContent = null，newContent = 新内容</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - 更新：oldContent / newContent 都为对应内容</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - 删除：newContent = null，oldContent = 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:#24292E;--shiki-dark:#E1E4E8;"> {</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:#6A737D;--shiki-dark:#6A737D;"> /** 变更前的代码块内容，新增时为 null */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> oldContent</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> CodeBlockContent</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:#6A737D;--shiki-dark:#6A737D;"> /** 变更后的代码块内容，删除时为 null */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> newContent</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> CodeBlockContent</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:#6A737D;--shiki-dark:#6A737D;"> /**</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * form 端 propPath/value 列表。撤销/重做时若有则按 propPath 局部更新；</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 缺省才退化为整内容替换。新增/删除场景通常无 changeRecords。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> changeRecords</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">?:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> ChangeRecord</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">[];</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 调用方可选传入的人类可读描述，用于历史面板展示；不影响 undo/redo 行为。 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> historyDescription</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:#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;"> * - 新增：oldSchema = null，newSchema = 新 schema</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - 更新：oldSchema / newSchema 都为对应 schema</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * - 删除：newSchema = null，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:#24292E;--shiki-dark:#E1E4E8;"> {</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:#6A737D;--shiki-dark:#6A737D;"> /** 变更前的数据源 schema，新增时为 null */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> oldSchema</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> DataSourceSchema</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:#6A737D;--shiki-dark:#6A737D;"> /** 变更后的数据源 schema，删除时为 null */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> newSchema</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> DataSourceSchema</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:#6A737D;--shiki-dark:#6A737D;"> /**</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * form 端 propPath/value 列表。撤销/重做时若有则按 propPath 局部更新；</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> * 缺省才退化为整 schema 替换。新增/删除场景通常无 changeRecords。</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> changeRecords</span><span style="--shiki-light:#D73A49;--shiki-dark:#F97583;">?:</span><span style="--shiki-light:#6F42C1;--shiki-dark:#B392F0;"> ChangeRecord</span><span style="--shiki-light:#24292E;--shiki-dark:#E1E4E8;">[];</span></span>
<span class="line"><span style="--shiki-light:#6A737D;--shiki-dark:#6A737D;"> /** 调用方可选传入的人类可读描述，用于历史面板展示；不影响 undo/redo 行为。 */</span></span>
<span class="line"><span style="--shiki-light:#E36209;--shiki-dark:#FFAB70;"> historyDescription</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:#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></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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