JPDA 架构研究21 - JDI的Debugger的UI部分

引入：

前面揭示了JDI的Debugger如何建立连接，发送和处理请求，这里我们专注于人机交互部分，Debugger的UI，它主要负责如何把人发出的操作转为请求，以及把请求操作反映在调试器的界面上。

分析：

这个插件主要都定义在org.eclipse.jdt.debug.ui_<Version>.jar中的plugin.xml中，它提供了各种人机交互的插件功能。打的比方，我们看编辑器功能：

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<extension          point="org.eclipse.ui.editorActions">       <editorContribution             targetID="org.eclipse.jdt.ui.CompilationUnitEditor"             id="org.eclipse.jdt.debug.CompilationUnitEditor.BreakpointRulerActions">          <action                label="%AddBreakpoint.label"                class="org.eclipse.debug.ui.actions.RulerToggleBreakpointActionDelegate"                actionID="RulerDoubleClick"                id="org.eclipse.jdt.debug.ui.actions.ManageBreakpointRulerAction">          </action>       </editorContribution>       <editorContribution             targetID="org.eclipse.jdt.ui.ClassFileEditor"             id="org.eclipse.jdt.debug.ClassFileEditor.BreakpointRulerActions">          <action                label="%AddBreakpoint.label"                class="org.eclipse.debug.ui.actions.RulerToggleBreakpointActionDelegate"                actionID="RulerDoubleClick"                id="org.eclipse.jdt.debug.ui.actions.ManageBreakpointRulerAction">          </action>       </editorContribution>       <editorContribution             targetID="org.eclipse.jdt.debug.ui.SnippetEditor"             id="org.eclipse.jdt.debug.ui.JavaSnippetToolbarActions">          <action                toolbarPath="evaluationGroup"                id="org.eclipse.jdt.debug.ui.SnippetExecute"                hoverIcon="$nl$/icons/full/etool16/run_sbook.gif"                class="org.eclipse.jdt.internal.debug.ui.actions.ExecuteAction"                disabledIcon="$nl$/icons/full/dtool16/run_sbook.gif"                enablesFor="+"                icon="$nl$/icons/full/etool16/run_sbook.gif"                helpContextId="execute_action_context"                label="%Execute.label"                tooltip="%Execute.tooltip">             <selection                   class="org.eclipse.jface.text.ITextSelection">             </selection>          </action>          <action                toolbarPath="evaluationGroup"                id="org.eclipse.jdt.debug.ui.SnippetDisplay"                hoverIcon="$nl$/icons/full/etool16/disp_sbook.gif"                class="org.eclipse.jdt.internal.debug.ui.actions.PopupDisplayAction"                disabledIcon="$nl$/icons/full/dtool16/disp_sbook.gif"                enablesFor="+"                icon="$nl$/icons/full/etool16/disp_sbook.gif"                helpContextId="display_action_context"                label="%Display.label"                tooltip="%Display.tooltip">             <selection                   class="org.eclipse.jface.text.ITextSelection">             </selection>          </action>          <action                toolbarPath="evaluationGroup"                id="org.eclipse.jdt.debug.ui.SnippetInspect"                hoverIcon="$nl$/icons/full/etool16/insp_sbook.gif"                class="org.eclipse.jdt.internal.debug.ui.actions.PopupInspectAction"                disabledIcon="$nl$/icons/full/dtool16/insp_sbook.gif"                enablesFor="+"                icon="$nl$/icons/full/etool16/insp_sbook.gif"                helpContextId="inspect_action_context"                label="%Inspect.label"                tooltip="%Inspect.tooltip">             <selection                   class="org.eclipse.jface.text.ITextSelection">             </selection>          </action>       </editorContribution>    </extension>

从这里看出，它支持好几个操作：如CompilationUnitEditor的打断点 ，ClassFileEditor的打断点等。

每个操作都有用到的图标，用到的action响应类等，有兴趣的可以看下。

本文转自 charles_wang888 51CTO博客，原文链接：http://blog.51cto.com/supercharles888/1588681，如需转载请自行联系原作者