jp.sourceforge.moreemacs/src/jp/sourceforge/moreemacs/handlers/TextEditorExecution.java

   1 package jp.sourceforge.moreemacs.handlers;\r
   2 \r
   3 import org.eclipse.jface.text.IDocument;\r
   4 import org.eclipse.jface.text.ITextOperationTarget;\r
   5 import org.eclipse.jface.text.ITextSelection;\r
   6 import org.eclipse.jface.text.ITextViewer;\r
   7 import org.eclipse.jface.text.ITextViewerExtension;\r
   8 import org.eclipse.ui.IEditorPart;\r
   9 import org.eclipse.ui.IWorkbenchWindow;\r
  10 import org.eclipse.ui.texteditor.ITextEditor;\r
  11 \r
  12 abstract class TextEditorExecution implements Execution {\r
  13     protected IWorkbenchWindow window;\r
  14     protected ITextEditor textEditor;\r
  15     protected ITextViewer textViewer;\r
  16     protected Cursor cursor;\r
  17     protected IDocument doc;\r
  18     \r
  19     @Override\r
  20     public boolean init(IWorkbenchWindow window) {\r
  21         this.window = window;\r
  22 \r
  23         IEditorPart editor = window.getActivePage().getActiveEditor();\r
  24         if (editor instanceof ITextEditor) {\r
  25             textEditor = (ITextEditor) editor;\r
  26         } else {\r
  27             textEditor = (ITextEditor) editor.getAdapter(ITextEditor.class);\r
  28         }\r
  29         if(textEditor == null) {\r
  30             return false;\r
  31         }\r
  32         \r
  33         doc = textEditor.getDocumentProvider().getDocument(\r
  34                 textEditor.getEditorInput());\r
  35 \r
  36         ITextOperationTarget target =\r
  37             (ITextOperationTarget)editor.getAdapter(ITextOperationTarget.class);\r
  38         if(!(target instanceof ITextViewer)) {\r
  39             return false;\r
  40         }\r
  41         textViewer = (ITextViewer) target;\r
  42         \r
  43         cursor = new Cursor(textEditor, textViewer);\r
  44         \r
  45         return true;\r
  46     }\r
  47     \r
  48     protected ITextSelection getSelection(boolean fallbackToMark) {\r
  49         ITextSelection selection =\r
  50             (ITextSelection) textEditor.getSelectionProvider().getSelection();\r
  51         \r
  52         if(!fallbackToMark && selection.getLength() != 0) {\r
  53             return selection;\r
  54         }\r
  55         \r
  56         IEditorPart editor = window.getActivePage().getActiveEditor();\r
  57         ITextOperationTarget target =\r
  58             (ITextOperationTarget)editor.getAdapter(ITextOperationTarget.class);\r
  59         \r
  60         if(!(target instanceof ITextViewerExtension)) {\r
  61             return selection;\r
  62         }\r
  63         \r
  64         ITextViewerExtension viewerEx = (ITextViewerExtension) target;\r
  65             \r
  66         int mark = viewerEx.getMark();\r
  67         \r
  68         if(mark == -1) {\r
  69             return selection;\r
  70         }\r
  71         \r
  72         int current = selection.getOffset();\r
  73         \r
  74         int start = (mark < current) ? mark : current;\r
  75         textViewer.setSelectedRange(start, Math.abs(mark - current));\r
  76         \r
  77         return (ITextSelection) textEditor.getSelectionProvider().getSelection();\r
  78     }\r
  79 \r
  80     protected final int getTabStop() {\r
  81         return textViewer.getTextWidget().getTabs();\r
  82     }\r
  83 }\r