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Diffstat (limited to 'bundles/org.eclipse.compare/compare/org/eclipse/compare/contentmergeviewer/ContentMergeViewer.java')
| -rw-r--r-- | bundles/org.eclipse.compare/compare/org/eclipse/compare/contentmergeviewer/ContentMergeViewer.java | 962 |
1 files changed, 0 insertions, 962 deletions
diff --git a/bundles/org.eclipse.compare/compare/org/eclipse/compare/contentmergeviewer/ContentMergeViewer.java b/bundles/org.eclipse.compare/compare/org/eclipse/compare/contentmergeviewer/ContentMergeViewer.java deleted file mode 100644 index bd390892d..000000000 --- a/bundles/org.eclipse.compare/compare/org/eclipse/compare/contentmergeviewer/ContentMergeViewer.java +++ /dev/null @@ -1,962 +0,0 @@ -/* - * Copyright (c) 2000, 2002 IBM Corp. All rights reserved. - * This file is 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.compare.contentmergeviewer; - -import java.util.ResourceBundle; - -import org.eclipse.swt.SWT; -import org.eclipse.swt.events.*; -import org.eclipse.swt.graphics.*; -import org.eclipse.swt.widgets.*; -import org.eclipse.swt.custom.CLabel; - -import org.eclipse.core.runtime.IProgressMonitor; -import org.eclipse.core.runtime.CoreException; - -import org.eclipse.jface.util.*; -import org.eclipse.jface.action.*; -import org.eclipse.jface.dialogs.*; -import org.eclipse.jface.resource.ImageDescriptor; -import org.eclipse.jface.viewers.ContentViewer; -import org.eclipse.jface.viewers.IContentProvider; -import org.eclipse.jface.viewers.ISelection; - -import org.eclipse.compare.*; -import org.eclipse.compare.structuremergeviewer.*; -import org.eclipse.compare.contentmergeviewer.IMergeViewerContentProvider; -import org.eclipse.compare.internal.*; - -/** - * An abstract compare and merge viewer with two side-by-side content areas - * and an optional content area for the ancestor. The implementation makes no - * assumptions about the content type. - * <p> - * <code>ContentMergeViewer</code> - * <ul> - * <li>implements the overall layout and defines hooks so that subclasses - * can easily provide an implementation for a specific content type, - * <li>implements the UI for making the areas resizable, - * <li>has an action for controlling whether the ancestor area is visible or not, - * <li>has actions for copying one side of the input to the other side, - * <li>tracks the dirty state of the left and right sides and send out notification - * on state changes. - * </ul> - * A <code>ContentMergeViewer</code> accesses its - * model by means of a content provider which must implement the - * <code>IMergeViewerContentProvider</code> interface. - * </p> - * <p> - * Clients may wish to use the standard concrete subclass <code>TextMergeViewer</code>, - * or define their own subclass. - * - * @see IMergeViewerContentProvider - * @see TextMergeViewer - */ -public abstract class ContentMergeViewer extends ContentViewer - implements IPropertyChangeNotifier, ISavable { - - class SaveAction extends MergeViewerAction { - - private boolean fLeft; - - SaveAction(boolean left) { - super(true, false, false); - Utilities.initAction(this, getResourceBundle(), "action.save."); //$NON-NLS-1$ - } - - public void run() { - saveContent(getInput()); - } - }; - - /** - * Property names. - */ - private static final String ANCESTOR_ENABLED= ComparePreferencePage.INITIALLY_SHOW_ANCESTOR_PANE; - - /* package */ static final int HORIZONTAL= 1; - /* package */ static final int VERTICAL= 2; - - static final double HSPLIT= 0.5; - static final double VSPLIT= 0.3; - - private class ContentMergeViewerLayout extends Layout { - - public Point computeSize(Composite c, int w, int h, boolean force) { - return new Point(100, 100); - } - - public void layout(Composite composite, boolean force) { - - // determine some derived sizes - int headerHeight= fLeftLabel.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).y; - Rectangle r= composite.getClientArea(); - - int centerWidth= getCenterWidth(); - int width1= (int)((r.width-centerWidth)*fHSplit); - int width2= r.width-width1-centerWidth; - - int height1= 0; - int height2= 0; - if (fAncestorEnabled && fShowAncestor) { - height1= (int)((r.height-(2*headerHeight))*fVSplit); - height2= r.height-(2*headerHeight)-height1; - } else { - height1= 0; - height2= r.height-headerHeight; - } - - int y= 0; - - if (fAncestorEnabled && fShowAncestor) { - fAncestorLabel.setBounds(0, y, r.width, headerHeight); - fAncestorLabel.setVisible(true); - y+= headerHeight; - handleResizeAncestor(0, y, r.width, height1); - y+= height1; - } else { - fAncestorLabel.setVisible(false); - handleResizeAncestor(0, 0, 0, 0); - } - - fLeftLabel.getSize(); // without this resizing would not always work - - if (centerWidth > 3) { - fLeftLabel.setBounds(0, y, width1+1, headerHeight); - fDirectionLabel.setVisible(true); - fDirectionLabel.setBounds(width1+1, y, centerWidth-1, headerHeight); - fRightLabel.setBounds(width1+centerWidth, y, width2, headerHeight); - } else { - fLeftLabel.setBounds(0, y, width1, headerHeight); - fDirectionLabel.setVisible(false); - fRightLabel.setBounds(width1, y, r.width-width1, headerHeight); - } - - y+= headerHeight; - - if (fCenter != null && !fCenter.isDisposed()) - fCenter.setBounds(width1, y, centerWidth, height2); - - handleResizeLeftRight(0, y, width1, centerWidth, width2, height2); - } - } - - class Resizer extends MouseAdapter implements MouseMoveListener { - - Control fControl; - int fX, fY; - int fWidth1, fWidth2; - int fHeight1, fHeight2; - int fDirection; - boolean fLiveResize; - - public Resizer(Control c, int dir) { - fDirection= dir; - fControl= c; - fControl.addMouseListener(this); - fLiveResize= !(fControl instanceof Sash); - - fControl.addDisposeListener( - new DisposeListener() { - public void widgetDisposed(DisposeEvent e) { - fControl= null; - } - } - ); - } - - public void mouseDoubleClick(MouseEvent e) { - if ((fDirection & HORIZONTAL) != 0) - fHSplit= HSPLIT; - if ((fDirection & VERTICAL) != 0) - fVSplit= VSPLIT; - fComposite.layout(true); - } - - public void mouseDown(MouseEvent e) { - Composite parent= fControl.getParent(); - - Point s= parent.getSize(); - Point as= fAncestorLabel.getSize(); - Point ys= fLeftLabel.getSize(); - Point ms= fRightLabel.getSize(); - - fWidth1= ys.x; - fWidth2= ms.x; - fHeight1= fLeftLabel.getLocation().y-as.y; - fHeight2= s.y-(fLeftLabel.getLocation().y+ys.y); - - fX= e.x; - fY= e.y; - fControl.addMouseMoveListener(this); - } - - public void mouseUp(MouseEvent e) { - fControl.removeMouseMoveListener(this); - if (!fLiveResize) - resize(e); - } - - public void mouseMove(MouseEvent e) { - if (fLiveResize) - resize(e); - } - - private void resize(MouseEvent e) { - int dx= e.x-fX; - int dy= e.y-fY; - - int centerWidth= fCenter.getSize().x; - - if (fWidth1 + dx > centerWidth && fWidth2 - dx > centerWidth) { - fWidth1+= dx; - fWidth2-= dx; - if ((fDirection & HORIZONTAL) != 0) - fHSplit= (double)fWidth1/(double)(fWidth1+fWidth2); - } - if (fHeight1 + dy > centerWidth && fHeight2 - dy > centerWidth) { - fHeight1+= dy; - fHeight2-= dy; - if ((fDirection & VERTICAL) != 0) - fVSplit= (double)fHeight1/(double)(fHeight1+fHeight2); - } - - fComposite.layout(true); - fControl.getDisplay().update(); - } - }; - - /** Style bits for top level composite */ - private int fStyles; - private ResourceBundle fBundle; - private CompareConfiguration fCompareConfiguration; - private IPropertyChangeListener fPropertyChangeListener; - private ICompareInputChangeListener fCompareInputChangeListener; - private ListenerList fListenerList; - boolean fConfirmSave= true; - - private double fHSplit= HSPLIT; // width ratio of left and right panes - private double fVSplit= VSPLIT; // height ratio of ancestor and bottom panes - - private boolean fAncestorEnabled= true; // show ancestor in case of conflicts - /* package */ boolean fShowAncestor= false; // if current input has conflicts - private boolean fIsThreeWay= false; - private ActionContributionItem fAncestorItem; - - private Action fCopyLeftToRightAction; // copy from left to right - private Action fCopyRightToLeftAction; // copy from right to left - - MergeViewerAction fLeftSaveAction; - MergeViewerAction fRightSaveAction; - - // SWT widgets - /* package */ Composite fComposite; - private CLabel fAncestorLabel; - private CLabel fLeftLabel; - private CLabel fRightLabel; - /* package */ CLabel fDirectionLabel; - /* package */ Control fCenter; - - //---- SWT resources to be disposed - private Image fRightArrow; - private Image fLeftArrow; - private Image fBothArrow; - //---- end - - /** - * Creates a new content merge viewer and initializes with a resource bundle and a - * configuration. - * - * @param bundle the resource bundle - * @param cc the configuration object - */ - protected ContentMergeViewer(int style, ResourceBundle bundle, CompareConfiguration cc) { - fStyles= style; - fBundle= bundle; - - fAncestorEnabled= Utilities.getBoolean(cc, ANCESTOR_ENABLED, fAncestorEnabled); - fConfirmSave= Utilities.getBoolean(cc, CompareEditor.CONFIRM_SAVE_PROPERTY, fConfirmSave); - - setContentProvider(new MergeViewerContentProvider(cc)); - - fCompareInputChangeListener= new ICompareInputChangeListener() { - public void compareInputChanged(ICompareInput input) { - ContentMergeViewer.this.internalRefresh(input); - } - }; - - fCompareConfiguration= cc; - if (fCompareConfiguration != null) { - fPropertyChangeListener= new IPropertyChangeListener() { - public void propertyChange(PropertyChangeEvent event) { - ContentMergeViewer.this.propertyChange(event); - } - }; - fCompareConfiguration.addPropertyChangeListener(fPropertyChangeListener); - } - - fLeftSaveAction= new SaveAction(true); - fLeftSaveAction.setEnabled(false); - fRightSaveAction= new SaveAction(false); - fRightSaveAction.setEnabled(false); - } - - //---- hooks --------------------- - - /** - * Returns the viewer's name. - * - * @return the viewer's name - */ - public String getTitle() { - return Utilities.getString(getResourceBundle(), "title"); //$NON-NLS-1$ - } - - /** - * Creates the SWT controls for the ancestor, left, and right - * content areas of this compare viewer. - * Implementations typically hold onto the controls - * so that they can be initialized with the input objects in method - * <code>updateContent</code>. - * - * @param composite the container for the three areas - */ - abstract protected void createControls(Composite composite); - - /** - * Lays out the ancestor area of the compare viewer. - * It is called whenever the viewer is resized or when the sashes between - * the areas are moved to adjust the size of the areas. - * - * @param x the horizontal position of the ancestor area within its container - * @param y the vertical position of the ancestor area within its container - * @param width the width of the ancestor area - * @param height the height of the ancestor area - */ - abstract protected void handleResizeAncestor(int x, int y, int width, int height); - - /** - * Lays out the left and right areas of the compare viewer. - * It is called whenever the viewer is resized or when the sashes between - * the areas are moved to adjust the size of the areas. - * - * @param x the horizontal position of the left area within its container - * @param y the vertical position of the left and right area within its container - * @param leftWidth the width of the left area - * @param centerWidth the width of the gap between the left and right areas - * @param rightWidth the width of the right area - * @param height the height of the left and right areas - */ - abstract protected void handleResizeLeftRight(int x, int y, int leftWidth, int centerWidth, - int rightWidth, int height); - - /** - * Contributes items to the given <code>ToolBarManager</code>. - * It is called when this viewer is installed in its container and if the container - * has a <code>ToolBarManager</code>. - * The <code>ContentMergeViewer</code> implementation of this method does nothing. - * Subclasses may reimplement. - * - * @param toolBarManager the toolbar manager to contribute to - */ - protected void createToolItems(ToolBarManager toolBarManager) { - } - - /** - * Initializes the controls of the three content areas with the given input objects. - * - * @param ancestor the input for the ancestor area - * @param left the input for the left area - * @param right the input for the right area - */ - abstract protected void updateContent(Object ancestor, Object left, Object right); - - /** - * Copies the content of one side to the other side. - * Called from the (internal) actions for copying the sides of the viewer's input object. - * - * @param leftToRight if <code>true</code>, the left side is copied to the right side; - * if <code>false</code>, the right side is copied to the left side - */ - abstract protected void copy(boolean leftToRight); - - /** - * Returns the byte contents of the left or right side. If the viewer - * has no editable content <code>null</code> can be returned. - * - * @param left if <code>true</code>, the byte contents of the left area is returned; - * if <code>false</code>, the byte contents of the right area - * @return the content as an array of bytes, or <code>null</code> - */ - abstract protected byte[] getContents(boolean left); - - //---------------------------- - - /** - * Returns the resource bundle of this viewer. - * - * @return the resource bundle - */ - protected ResourceBundle getResourceBundle() { - return fBundle; - } - - /** - * Returns the compare configuration of this viewer, - * or <code>null</code> if this viewer does not yet have a configuration. - * - * @return the compare configuration, or <code>null</code> if none - */ - protected CompareConfiguration getCompareConfiguration() { - return fCompareConfiguration; - } - - /** - * The <code>ContentMergeViewer</code> implementation of this - * <code>ContentViewer</code> method - * checks to ensure that the content provider is an <code>IMergeViewerContentProvider</code>. - */ - public void setContentProvider(IContentProvider contentProvider) { - Assert.isTrue(contentProvider instanceof IMergeViewerContentProvider); - super.setContentProvider(contentProvider); - } - - /* package */ IMergeViewerContentProvider getMergeContentProvider() { - return (IMergeViewerContentProvider) getContentProvider(); - } - - /** - * The <code>ContentMergeViewer</code> implementation of this - * <code>Viewer</code> method returns the empty selection. Subclasses may override. - */ - public ISelection getSelection() { - return new ISelection() { - public boolean isEmpty() { - return true; - } - }; - } - - /** - * The <code>ContentMergeViewer</code> implementation of this - * <code>Viewer</code> method does nothing. Subclasses may reimplement. - */ - public void setSelection(ISelection s, boolean reveal) { - } - - /* package */ void propertyChange(PropertyChangeEvent event) { - - String key= event.getProperty(); - - if (key.equals(ANCESTOR_ENABLED)) { - fAncestorEnabled= Utilities.getBoolean(getCompareConfiguration(), ANCESTOR_ENABLED, fAncestorEnabled); - fComposite.layout(true); - return; - } - } - - void setAncestorVisibility(boolean visible, boolean enabled) { - if (fAncestorItem != null) { - Action action= (Action) fAncestorItem.getAction(); - if (action != null) { - action.setChecked(visible); - action.setEnabled(enabled); - } - } - if (fCompareConfiguration != null) - fCompareConfiguration.setProperty(ANCESTOR_ENABLED, new Boolean(visible)); - } - - //---- input - - /* package */ boolean isThreeWay() { - return fIsThreeWay; - } - - /** - * Internal hook method called when the input to this viewer is - * initially set or subsequently changed. - * <p> - * The <code>ContentMergeViewer</code> implementation of this <code>Viewer</code> - * method tries to save the old input by calling <code>doSave(...)</code> and - * then calls <code>internalRefresh(...)</code>. - * - * @param input the new input of this viewer, or <code>null</code> if there is no new input - * @param oldInput the old input element, or <code>null</code> if there was previously no input - */ - protected final void inputChanged(Object input, Object oldInput) { - - if (input != oldInput) - if (oldInput instanceof ICompareInput) - ((ICompareInput)oldInput).removeCompareInputChangeListener(fCompareInputChangeListener); - - boolean success= doSave(input, oldInput); - - if (input != oldInput) - if (input instanceof ICompareInput) - ((ICompareInput)input).addCompareInputChangeListener(fCompareInputChangeListener); - - if (success) { - setLeftDirty(false); - setRightDirty(false); - } - - if (input != oldInput) - internalRefresh(input); - } - - /** - * This method is called from the <code>Viewer</code> method <code>inputChanged</code> - * to save any unsaved changes of the old input. - * <p> - * The <code>ContentMergeViewer</code> implementation of this - * method calls <code>saveContent(...)</code>. If confirmation has been turned on - * with <code>setConfirmSave(true)</code>, a confirmation alert is posted before saving. - * </p> - * Clients can override this method and are free to decide whether - * they want to call the inherited method. - * @param newInput the new input of this viewer, or <code>null</code> if there is no new input - * @param oldInput the old input element, or <code>null</code> if there was previously no input - * @return <code>true</code> if saving was successful, or if the user didn't want to save (by pressing 'NO' in the confirmation dialog). - * @since 2.0 - */ - protected boolean doSave(Object newInput, Object oldInput) { - - // before setting the new input we have to save the old - if (fLeftSaveAction.isEnabled() || fRightSaveAction.isEnabled()) { - - // post alert - if (fConfirmSave) { - Shell shell= fComposite.getShell(); - - MessageDialog dialog= new MessageDialog(shell, - Utilities.getString(getResourceBundle(), "saveDialog.title"), //$NON-NLS-1$ - null, // accept the default window icon - Utilities.getString(getResourceBundle(), "saveDialog.message"), //$NON-NLS-1$ - MessageDialog.QUESTION, - new String[] { - IDialogConstants.YES_LABEL, - IDialogConstants.NO_LABEL, - }, - 0); // default button index - - switch (dialog.open()) { // open returns index of pressed button - case 0: - saveContent(oldInput); - break; - case 1: - setLeftDirty(false); - setRightDirty(false); - break; - case 2: - throw new ViewerSwitchingCancelled(); - } - } else - saveContent(oldInput); - return true; - } - return false; - } - - /** - * Controls whether <code>doSave(...)</code> asks for confirmation before saving - * the old input with <code>saveContent(...)</code>. - * @param enable a value of <code>true</code> enables confirmation - * @since 2.0 - */ - public void setConfirmSave(boolean enable) { - fConfirmSave= enable; - } - - /* (non Javadoc) - * see Viewer.refresh - */ - public void refresh() { - internalRefresh(getInput()); - } - - private void internalRefresh(Object input) { - - IMergeViewerContentProvider content= getMergeContentProvider(); - if (content != null) { - Object ancestor= content.getAncestorContent(input); - if (input instanceof ICompareInput) - fIsThreeWay= (((ICompareInput)input).getKind() & Differencer.DIRECTION_MASK) != 0; - else - fIsThreeWay= ancestor != null; - - if (fAncestorItem != null) - fAncestorItem.setVisible(fIsThreeWay); - - boolean oldFlag= fShowAncestor; - fShowAncestor= fIsThreeWay && content.showAncestor(input); - - if (fAncestorEnabled && oldFlag != fShowAncestor) - fComposite.layout(true); - - ToolBarManager tbm= CompareViewerSwitchingPane.getToolBarManager(fComposite.getParent()); - if (tbm != null) { - updateToolItems(); - tbm.update(true); - tbm.getControl().getParent().layout(true); - } - - updateHeader(); - - Object left= content.getLeftContent(input); - Object right= content.getRightContent(input); - updateContent(ancestor, left, right); - } - } - - //---- layout & SWT control creation - - /** - * Builds the SWT controls for the three areas of a compare/merge viewer. - * <p> - * Calls the hooks <code>createControls</code> and <code>createToolItems</code> - * to let subclasses build the specific content areas and to add items to - * an enclosing toolbar. - * <p> - * This method must only be called in the constructor of subclasses. - * - * @param parent the parent control - * @return the new control - */ - protected final Control buildControl(Composite parent) { - - fComposite= new Composite(parent, fStyles) { - public boolean setFocus() { - return internalSetFocus(); - } - }; - fComposite.setData(CompareUI.COMPARE_VIEWER_TITLE, getTitle()); - - hookControl(fComposite); // hook help & dispose listener - - fComposite.setLayout(new ContentMergeViewerLayout()); - - int style= SWT.SHADOW_OUT; - fAncestorLabel= new CLabel(fComposite, style); - - fLeftLabel= new CLabel(fComposite, style); - new Resizer(fLeftLabel, VERTICAL); - - fDirectionLabel= new CLabel(fComposite, style); - fDirectionLabel.setAlignment(SWT.CENTER); - new Resizer(fDirectionLabel, HORIZONTAL | VERTICAL); - - fRightLabel= new CLabel(fComposite, style); - new Resizer(fRightLabel, VERTICAL); - - if (fCenter == null || fCenter.isDisposed()) - fCenter= createCenter(fComposite); - - createControls(fComposite); - - ToolBarManager tbm= CompareViewerSwitchingPane.getToolBarManager(parent); - if (tbm != null) { - tbm.removeAll(); - - // define groups - tbm.add(new Separator("modes")); //$NON-NLS-1$ - tbm.add(new Separator("merge")); //$NON-NLS-1$ - tbm.add(new Separator("navigation")); //$NON-NLS-1$ - - CompareConfiguration cc= getCompareConfiguration(); - - if (cc.isRightEditable()) { - fCopyLeftToRightAction= - new Action() { - public void run() { - copy(true); - } - }; - Utilities.initAction(fCopyLeftToRightAction, getResourceBundle(), "action.CopyLeftToRight."); //$NON-NLS-1$ - tbm.appendToGroup("merge", fCopyLeftToRightAction); //$NON-NLS-1$ - } - - if (cc.isLeftEditable()) { - fCopyRightToLeftAction= - new Action() { - public void run() { - copy(false); - } - }; - Utilities.initAction(fCopyRightToLeftAction, getResourceBundle(), "action.CopyRightToLeft."); //$NON-NLS-1$ - tbm.appendToGroup("merge", fCopyRightToLeftAction); //$NON-NLS-1$ - } - - Action a= new ChangePropertyAction(fBundle, fCompareConfiguration, "action.EnableAncestor.", ANCESTOR_ENABLED); //$NON-NLS-1$ - a.setChecked(fAncestorEnabled); - fAncestorItem= new ActionContributionItem(a); - fAncestorItem.setVisible(false); - tbm.appendToGroup("modes", fAncestorItem); //$NON-NLS-1$ - - createToolItems(tbm); - updateToolItems(); - - tbm.update(true); - } - - return fComposite; - } - - /* package */ boolean internalSetFocus() { - return false; - } - - /* package */ int getCenterWidth() { - return 3; - } - - /* package */ boolean getAncestorEnabled() { - return fAncestorEnabled; - } - - /* package */ Control createCenter(Composite parent) { - Sash sash= new Sash(parent, SWT.VERTICAL); - new Resizer(sash, HORIZONTAL); - return sash; - } - - /* package */ Control getCenter() { - return fCenter; - } - - /* - * @see Viewer.getControl() - */ - public Control getControl() { - return fComposite; - } - - /** - * Called on the viewer disposal. - * Unregisters from the compare configuration. - * Clients may extend if they have to do additional cleanup. - */ - protected void handleDispose(DisposeEvent event) { - - Object input= getInput(); - if (input instanceof ICompareInput) - ((ICompareInput)input).removeCompareInputChangeListener(fCompareInputChangeListener); - - if (fCompareConfiguration != null && fPropertyChangeListener != null) { - fCompareConfiguration.removePropertyChangeListener(fPropertyChangeListener); - fPropertyChangeListener= null; - } - - fAncestorLabel= null; - fLeftLabel= null; - fDirectionLabel= null; - fRightLabel= null; - fCenter= null; - - if (fRightArrow != null) { - fRightArrow.dispose(); - fRightArrow= null; - } - if (fLeftArrow != null) { - fLeftArrow.dispose(); - fLeftArrow= null; - } - if (fBothArrow != null) { - fBothArrow.dispose(); - fBothArrow= null; - } - - super.handleDispose(event); - } - - /** - * Updates the enabled state of the toolbar items. - * <p> - * This method is called whenever the state of the items needs updating. - * <p> - * Subclasses may extend this method, although this is generally not required. - */ - protected void updateToolItems() { - - IMergeViewerContentProvider content= getMergeContentProvider(); - - Object input= getInput(); - - if (fCopyLeftToRightAction != null) { - boolean enable= content.isRightEditable(input); -// if (enable && input instanceof ICompareInput) { -// ITypedElement e= ((ICompareInput) input).getLeft(); -// if (e == null) -// enable= false; -// } - fCopyLeftToRightAction.setEnabled(enable); - } - - if (fCopyRightToLeftAction != null) { - boolean enable= content.isLeftEditable(input); -// if (enable && input instanceof ICompareInput) { -// ITypedElement e= ((ICompareInput) input).getRight(); -// if (e == null) -// enable= false; -// } - fCopyRightToLeftAction.setEnabled(enable); - } - } - - /** - * Updates the headers of the three areas - * by querying the content provider for a name and image for - * the three sides of the input object. - * <p> - * This method is called whenever the header must be updated. - * <p> - * Subclasses may extend this method, although this is generally not required. - */ - protected void updateHeader() { - - IMergeViewerContentProvider content= getMergeContentProvider(); - Object input= getInput(); - - if (fAncestorLabel != null) { - fAncestorLabel.setImage(content.getAncestorImage(input)); - fAncestorLabel.setText(content.getAncestorLabel(input)); - } - if (fLeftLabel != null) { - fLeftLabel.setImage(content.getLeftImage(input)); - fLeftLabel.setText(content.getLeftLabel(input)); - } - if (fRightLabel != null) { - fRightLabel.setImage(content.getRightImage(input)); - fRightLabel.setText(content.getRightLabel(input)); - } - } - - private Image loadImage(String name) { - ImageDescriptor id= ImageDescriptor.createFromFile(ContentMergeViewer.class, name); - if (id != null) - return id.createImage(); - return null; - } - - /** - * Calculates the height of the header. - */ - /* package */ int getHeaderHeight() { - int headerHeight= fLeftLabel.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).y; - headerHeight= Math.max(headerHeight, fDirectionLabel.computeSize(SWT.DEFAULT, SWT.DEFAULT, true).y); - return headerHeight; - } - - //---- merge direction - - /** - * Returns true if both sides are editable. - */ - /* package */ boolean canToggleMergeDirection() { - IMergeViewerContentProvider content= getMergeContentProvider(); - Object input= getInput(); - return content.isLeftEditable(input) && content.isRightEditable(input); - } - - //---- dirty state & saving state - - /* (non Javadoc) - * see IPropertyChangeNotifier.addPropertyChangeListener - */ - public void addPropertyChangeListener(IPropertyChangeListener listener) { - if (fListenerList == null) - fListenerList= new ListenerList(); - fListenerList.add(listener); - } - - /* (non Javadoc) - * see IPropertyChangeNotifier.removePropertyChangeListener - */ - public void removePropertyChangeListener(IPropertyChangeListener listener) { - if (fListenerList != null) { - fListenerList.remove(listener); - if (fListenerList.isEmpty()) - fListenerList= null; - } - } - - /* package */ void fireDirtyState(boolean state) { - Utilities.firePropertyChange(fListenerList, this, CompareEditorInput.DIRTY_STATE, null, new Boolean(state)); - } - - /** - * Sets the dirty state of the left side of this viewer. - * If the new value differs from the old - * all registered listener are notified with - * a <code>PropertyChangeEvent</code> with the - * property name <code>CompareEditorInput.DIRTY_STATE</code>. - * - * @param dirty the state of the left side dirty flag - */ - protected void setLeftDirty(boolean dirty) { - if (fLeftSaveAction.isEnabled() != dirty) { - fLeftSaveAction.setEnabled(dirty); - fireDirtyState(dirty); - } - } - - /** - * Sets the dirty state of the right side of this viewer. - * If the new value differs from the old - * all registered listener are notified with - * a <code>PropertyChangeEvent</code> with the - * property name <code>CompareEditorInput.DIRTY_STATE</code>. - * - * @param dirty the state of the right side dirty flag - */ - protected void setRightDirty(boolean dirty) { - if (fRightSaveAction.isEnabled() != dirty) { - fRightSaveAction.setEnabled(dirty); - fireDirtyState(dirty); - } - } - - /** - * Save the viewers's content. - * Note: this method is for internal use only. Clients should not call this method. - * @since 2.0 - */ - public void save(IProgressMonitor pm) throws CoreException { - saveContent(getInput()); - } - - /** - * Save modified content back to input elements via the content provider. - */ - /* package */ void saveContent(Object oldInput) { - - // write back modified contents - IMergeViewerContentProvider content= (IMergeViewerContentProvider) getContentProvider(); - - boolean leftEmpty= content.getLeftContent(oldInput) == null; - boolean rightEmpty= content.getRightContent(oldInput) == null; - - if (fCompareConfiguration.isLeftEditable() && fLeftSaveAction.isEnabled()) { - byte[] bytes= getContents(true); - if (leftEmpty && bytes != null && bytes.length == 0) - bytes= null; - setLeftDirty(false); - content.saveLeftContent(oldInput, bytes); - } - - if (fCompareConfiguration.isRightEditable() && fRightSaveAction.isEnabled()) { - byte[] bytes= getContents(false); - if (rightEmpty && bytes != null && bytes.length == 0) - bytes= null; - setRightDirty(false); - content.saveRightContent(oldInput, bytes); - } - } -} |