StackOverflow2013

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copied!<p>Wouldn't it be easier to detect the caret current position. Having the position let you easily detect if the caret is on a word (define word as you like, for example space-separated, java identifier, or with a regular expression).</p> <p>I'm not able to run eclipse here, but I would use the <a href="http://help.eclipse.org/helios/topic/org.eclipse.platform.doc.isv/reference/api/org/eclipse/swt/custom/CaretListener.html" rel="nofollow">CaretListener</a> class in order to detect caret movements and thus extracting the word under it. The <code>CaretEvent</code> given as parameter to the <code>caretMoved</code> method will contain the offset.</p> <p>The <code>CaretListener</code> can be attached to the <code>Adapter</code> of your <code>StyledText</code> component, that you can get from your <code>EditorPart</code> (don't have any more info for the moment, as I don't have eclipse running here).</p> <p>Hope it helps.</p> <p>Edit: Some code.</p> <pre><code>final StyledText text = (StyledText)editorPart.getAdapter(Control.class); text.addCaretListener(new CaretListener() { public void caretMoved(CaretEvent event) { int offset = event.caretOffset; String word = findWord(offset, text); if (word.length() > 0) { System.out.println("Word under caret: " + word); } } }); private String findWord(int offset, StyledText text) { int lineIndex = text.getLineAtOffset(offset); int offsetInLine = offset - text.getOffsetAtLine(lineIndex); String line = text.getLine(lineIndex); StringBuilder word = new StringBuilder(); if (offsetInLine > 0 && offsetInLine < line.length()) { for (int i = offsetInLine; i >= 0; --i) { if (!Character.isSpaceChar(line.charAt(i))) { word.append(line.charAt(i)); } else { break; } } word = word.reverse(); } if (offsetInLine < line.length()) { for (int i = offsetInLine; i < line.length(); ++i) { if (i == offsetInLine) continue; // duplicate if (!Character.isSpaceChar(line.charAt(i))) { word.append(line.charAt(i)); } else { break; } } } return word.toString(); } </code></pre> <p>This is simple implementation to get the word under the cursor based on space character surrounding it. A more robust implementation should be used in order to detect valid Java identifiers etc. For example using <code>Character.isJavaIdentifierStart</code> and <code>Character.isJavaIdentifierPart</code> or using a library for this.</p>

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