diff options
Diffstat (limited to 'org.eclipse.ui.workbench.texteditor/src/org/eclipse/ui/texteditor/DeleteLineTarget.java')
| -rw-r--r-- | org.eclipse.ui.workbench.texteditor/src/org/eclipse/ui/texteditor/DeleteLineTarget.java | 353 |
1 files changed, 0 insertions, 353 deletions
diff --git a/org.eclipse.ui.workbench.texteditor/src/org/eclipse/ui/texteditor/DeleteLineTarget.java b/org.eclipse.ui.workbench.texteditor/src/org/eclipse/ui/texteditor/DeleteLineTarget.java deleted file mode 100644 index 1a76e1f445d..00000000000 --- a/org.eclipse.ui.workbench.texteditor/src/org/eclipse/ui/texteditor/DeleteLineTarget.java +++ /dev/null @@ -1,353 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2000, 2004 IBM Corporation and others. - * All rights reserved. This program and the accompanying materials - * are made available under the terms of the Common Public License v1.0 - * which accompanies this distribution, and is available at - * http://www.eclipse.org/legal/cpl-v10.html - * - * Contributors: - * IBM Corporation - initial API and implementation - *******************************************************************************/ - -package org.eclipse.ui.texteditor; - -import org.eclipse.core.runtime.IStatus; -import org.eclipse.core.runtime.Status; - -import org.eclipse.swt.SWTError; -import org.eclipse.swt.custom.StyledText; -import org.eclipse.swt.dnd.Clipboard; -import org.eclipse.swt.dnd.DND; -import org.eclipse.swt.dnd.TextTransfer; -import org.eclipse.swt.dnd.Transfer; -import org.eclipse.swt.events.FocusEvent; -import org.eclipse.swt.events.FocusListener; -import org.eclipse.swt.events.ModifyEvent; -import org.eclipse.swt.events.ModifyListener; -import org.eclipse.swt.events.MouseEvent; -import org.eclipse.swt.events.MouseListener; - -import org.eclipse.jface.text.Assert; -import org.eclipse.jface.text.BadLocationException; -import org.eclipse.jface.text.IDocument; -import org.eclipse.jface.text.IRegion; -import org.eclipse.jface.text.ITextListener; -import org.eclipse.jface.text.ITextViewer; -import org.eclipse.jface.text.Region; -import org.eclipse.jface.text.TextEvent; - -import org.eclipse.ui.internal.texteditor.TextEditorPlugin; - -import org.eclipse.jface.viewers.ISelectionChangedListener; -import org.eclipse.jface.viewers.SelectionChangedEvent; - - -/** - * A delete line target. - * @since 2.1 - */ -class DeleteLineTarget { - - /** - * A clipboard which concatenates subsequent delete line actions. - */ - private static class DeleteLineClipboard implements MouseListener, ModifyListener, ISelectionChangedListener, ITextListener, FocusListener { - - /** The text viewer. */ - private final ITextViewer fViewer; - /* - * This is a hack to stop a string of deletions when the user moves - * the caret. This kludge is necessary since: - * 1) Moving the caret does not fire a selection event - * 2) There is no support in StyledText for a CaretListener - * 3) The AcceleratorScope and KeybindingService classes are internal - * - * This kludge works by comparing the offset of the caret to the offset - * recorded the last time the action was run. If they differ, we do not - * continue the session. - * - * @see #saveState - * @see #checkState - */ - /** The last known offset of the caret */ - private int fIndex= -1; - /** The clip board. */ - private Clipboard fClipboard; - /** A string buffer. */ - private final StringBuffer fBuffer= new StringBuffer(); - /** The delete flag indicates if a deletion is in progress. */ - private boolean fDeleting; - - /** - * Creates the clipboard. - * - * @param viewer the text viewer - */ - public DeleteLineClipboard(ITextViewer viewer) { - Assert.isNotNull(viewer); - fViewer= viewer; - } - - /** - * Returns the text viewer. - * - * @return the text viewer - */ - public ITextViewer getViewer() { - return fViewer; - } - - /** - * Saves the current state, to be compared later using - * <code>checkState</code>. - */ - private void saveState() { - fIndex= fViewer.getTextWidget().getCaretOffset(); - } - - /** - * Checks that the state has not changed since it was saved. - * - * @return returns <code>true</code> if the current state is the same as - * when it was last saved. - */ - private boolean hasSameState() { - return fIndex == fViewer.getTextWidget().getCaretOffset(); - } - - /** - * Checks the state of the clipboard. - */ - public void checkState() { - - if (fClipboard == null) { - StyledText text= fViewer.getTextWidget(); - if (text == null) - return; - - fViewer.getSelectionProvider().addSelectionChangedListener(this); - text.addFocusListener(this); - text.addMouseListener(this); - text.addModifyListener(this); - - fClipboard= new Clipboard(text.getDisplay()); - fBuffer.setLength(0); - - } else if (!hasSameState()) { - fBuffer.setLength(0); - } - } - - /** - * Appends the given string to this clipboard. - * - * @param deltaString the string to append - */ - public void append(String deltaString) { - fBuffer.append(deltaString); - String string= fBuffer.toString(); - Transfer[] dataTypes= new Transfer[] { TextTransfer.getInstance() }; - Object[] data= new Object[] { string }; - fClipboard.setContents(data, dataTypes); - } - - /** - * Uninstalls this action. - */ - private void uninstall() { - - if (fClipboard == null) - return; - - StyledText text= fViewer.getTextWidget(); - if (text == null) - return; - - fViewer.getSelectionProvider().removeSelectionChangedListener(this); - text.removeFocusListener(this); - text.removeMouseListener(this); - text.removeModifyListener(this); - - fClipboard.dispose(); - fClipboard= null; - } - - /** - * Mark whether a deletion is in progress. - * - * @param deleting <code>true</code> if a deletion is in progress - */ - public void setDeleting(boolean deleting) { - fDeleting= deleting; - } - - /* - * @see org.eclipse.swt.events.MouseListener#mouseDoubleClick(MouseEvent) - */ - public void mouseDoubleClick(MouseEvent e) { - uninstall(); - } - - /* - * @see org.eclipse.swt.events.MouseListener#mouseDown(MouseEvent) - */ - public void mouseDown(MouseEvent e) { - uninstall(); - } - - /* - * @see org.eclipse.swt.events.MouseListener#mouseUp(MouseEvent) - */ - public void mouseUp(MouseEvent e) { - uninstall(); - } - - /* - * @see org.eclipse.jface.viewers.ISelectionChangedListener#selectionChanged(SelectionChangedEvent) - */ - public void selectionChanged(SelectionChangedEvent event) { - uninstall(); - } - - /* - * @see org.eclipse.swt.events.FocusListener#focusGained(FocusEvent) - */ - public void focusGained(FocusEvent e) { - uninstall(); - } - - /* - * @see org.eclipse.swt.events.FocusListener#focusLost(FocusEvent) - */ - public void focusLost(FocusEvent e) { - uninstall(); - } - - /* - * @see org.eclipse.jface.text.ITextListener#textChanged(TextEvent) - */ - public void textChanged(TextEvent event) { - uninstall(); - } - - /* - * @see org.eclipse.swt.events.ModifyListener#modifyText(ModifyEvent) - */ - public void modifyText(ModifyEvent e) { - if (!fDeleting) - uninstall(); - } - } - - /** - * The clipboard manager. - */ - private final DeleteLineClipboard fClipboard; - - /** - * Creates a new target. - * - * @param viewer the viewer that the new target operates on - */ - public DeleteLineTarget(ITextViewer viewer) { - fClipboard= new DeleteLineClipboard(viewer); - } - - /** - * Returns the document's delete region specified by position and type. - * - * @param document the document - * @param position the position - * @param type the line deletion type, must be one of - * <code>WHOLE_LINE</code>, <code>TO_BEGINNING</code> or <code>TO_END</code> - * @return the document's delete region - * @throws BadLocationException - */ - private static IRegion getDeleteRegion(IDocument document, int position, int type) throws BadLocationException { - - int line= document.getLineOfOffset(position); - int offset= 0; - int length= 0; - - switch (type) { - case DeleteLineAction.WHOLE: - offset= document.getLineOffset(line); - length= document.getLineLength(line); - break; - - case DeleteLineAction.TO_BEGINNING: - offset= document.getLineOffset(line); - length= position - offset; - break; - - case DeleteLineAction.TO_END: - offset= position; - - IRegion lineRegion= document.getLineInformation(line); - int end= lineRegion.getOffset() + lineRegion.getLength(); - - if (position == end) { - String lineDelimiter= document.getLineDelimiter(line); - length= lineDelimiter == null ? 0 : lineDelimiter.length(); - - } else { - length= end - offset; - } - break; - - default: - throw new IllegalArgumentException(); - } - - return new Region(offset, length); - } - - /** - * Deletes the specified fraction of the line of the given offset. - * - * @param document the document - * @param position the offset - * @param type the line deletion type, must be one of - * <code>WHOLE_LINE</code>, <code>TO_BEGINNING</code> or <code>TO_END</code> - * @param copyToClipboard <code>true</code> if the deleted line should be copied to the clipboard - * @throws BadLocationException if position is not valid in the given document - */ - public void deleteLine(IDocument document, int position, int type, boolean copyToClipboard) throws BadLocationException { - - IRegion deleteRegion= getDeleteRegion(document, position, type); - int offset= deleteRegion.getOffset(); - int length= deleteRegion.getLength(); - - if (length == 0) - return; - - if (copyToClipboard) { - - fClipboard.checkState(); - try { - fClipboard.append(document.get(offset, length)); - } catch (SWTError e) { - if (e.code != DND.ERROR_CANNOT_SET_CLIPBOARD) - throw e; - // see https://bugs.eclipse.org/bugs/show_bug.cgi?id=59459 - // don't delete if copy to clipboard fails, rather log & abort - - // log - Status status= new Status(IStatus.ERROR, TextEditorPlugin.PLUGIN_ID, e.code, EditorMessages.getString("Editor.error.clipboard.copy.failed.message"), e); //$NON-NLS-1$ - TextEditorPlugin.getDefault().getLog().log(status); - - fClipboard.uninstall(); - return; // don't delete - } - - fClipboard.setDeleting(true); - document.replace(offset, length, null); - fClipboard.setDeleting(false); - - fClipboard.saveState(); - - } else { - document.replace(offset, length, null); - } - } -} |