/*
* (non-Javadoc)
*
* @see org.eclipse.jface.bindings.keys.AbstractKeyFormatter#sortModifierKeys(int)
*/
protected int[] sortModifierKeys(final int modifierKeys) {
final IKeyLookup lookup = KeyLookupFactory.getDefault();
final int[] sortedKeys = new int[4];
int index = 0;
if (Util.isWindows()) {
if ((modifierKeys & lookup.getCtrl()) != 0) {
sortedKeys[index++] = lookup.getCtrl();
}
if ((modifierKeys & lookup.getAlt()) != 0) {
sortedKeys[index++] = lookup.getAlt();
}
if ((modifierKeys & lookup.getShift()) != 0) {
sortedKeys[index++] = lookup.getShift();
}
} else if (Util.isGtk() || Util.isMotif()) {
if ((modifierKeys & lookup.getShift()) != 0) {
sortedKeys[index++] = lookup.getShift();
}
if ((modifierKeys & lookup.getCtrl()) != 0) {
sortedKeys[index++] = lookup.getCtrl();
}
if ((modifierKeys & lookup.getAlt()) != 0) {
sortedKeys[index++] = lookup.getAlt();
}
} else if (Util.isMac()) {
if ((modifierKeys & lookup.getShift()) != 0) {
sortedKeys[index++] = lookup.getShift();
}
if ((modifierKeys & lookup.getCtrl()) != 0) {
sortedKeys[index++] = lookup.getCtrl();
}
if ((modifierKeys & lookup.getAlt()) != 0) {
sortedKeys[index++] = lookup.getAlt();
}
if ((modifierKeys & lookup.getCommand()) != 0) {
sortedKeys[index++] = lookup.getCommand();
}
}
return sortedKeys;
}
/*
* The lightweight popup used to show content proposals for a text field. If
* additional information exists for a proposal, then selecting that
* proposal will result in the information being displayed in a secondary
* popup.
*/
public class ContentProposalPopup extends PopupDialog {
/*
* Set to <code>true</code> to use a Table with SWT.VIRTUAL. This is a
* workaround for https://bugs.eclipse.org/bugs/show_bug.cgi?id=98585#c40
* The corresponding SWT bug is
* https://bugs.eclipse.org/bugs/show_bug.cgi?id=90321
*/
private static final boolean USE_VIRTUAL = !Util.isMotif();
/*
* Empty string.
*/
private static final String EMPTY = ""; // $NON-NLS-1$
/*
* The delay before showing a secondary popup.
*/
private static final int POPUP_DELAY = 750;
/*
* The character height hint for the popup. May be overridden by using
* setInitialPopupSize.
*/
private static final int POPUP_CHAR_HEIGHT = 10;
/*
* The minimum pixel width for the popup. May be overridden by using
* setInitialPopupSize.
*/
private static final int POPUP_MINIMUM_WIDTH = 300;
/*
* The pixel offset of the popup from the bottom corner of the control.
*/
private static final int POPUP_OFFSET = 3;
/*
* The listener we install on the popup and related controls to determine
* when to close the popup. Some events (move, resize, close, deactivate)
* trigger closure as soon as they are received, simply because one of the
* registered listeners received them. Other events depend on additional
* circumstances.
*/
private final class PopupCloserListener implements Listener {
private boolean scrollbarClicked = false;
public void handleEvent(final Event e) {
// If focus is leaving an important widget or the field's
// shell is deactivating
if (e.type == SWT.FocusOut) {
scrollbarClicked = false;
/*
* Ignore this event if it's only happening because focus is
* moving between the popup shells, their controls, or a
* scrollbar. Do this in an async since the focus is not
* actually switched when this event is received.
*/
e.display.asyncExec(
new Runnable() {
public void run() {
if (isValid()) {
if (scrollbarClicked || hasFocus()) {
return;
}
// Workaround a problem on X and Mac, whereby at
// this point, the focus control is not known.
// This can happen, for example, when resizing
// the popup shell on the Mac.
// Check the active shell.
Shell activeShell = e.display.getActiveShell();
if (activeShell == getShell()
|| (infoPopup != null && infoPopup.getShell() == activeShell)) {
return;
}
/*
* System.out.println(e);
* System.out.println(e.display.getFocusControl());
* System.out.println(e.display.getActiveShell());
*/
close();
}
}
});
return;
}
// Scroll bar has been clicked. Remember this for focus event
// processing.
if (e.type == SWT.Selection) {
scrollbarClicked = true;
return;
}
// For all other events, merely getting them dictates closure.
close();
}
// Install the listeners for events that need to be monitored for
// popup closure.
void installListeners() {
// Listeners on this popup's table and scroll bar
proposalTable.addListener(SWT.FocusOut, this);
ScrollBar scrollbar = proposalTable.getVerticalBar();
if (scrollbar != null) {
scrollbar.addListener(SWT.Selection, this);
}
// Listeners on this popup's shell
getShell().addListener(SWT.Deactivate, this);
getShell().addListener(SWT.Close, this);
// Listeners on the target control
control.addListener(SWT.MouseDoubleClick, this);
control.addListener(SWT.MouseDown, this);
control.addListener(SWT.Dispose, this);
control.addListener(SWT.FocusOut, this);
// Listeners on the target control's shell
Shell controlShell = control.getShell();
controlShell.addListener(SWT.Move, this);
controlShell.addListener(SWT.Resize, this);
}
// Remove installed listeners
void removeListeners() {
if (isValid()) {
proposalTable.removeListener(SWT.FocusOut, this);
ScrollBar scrollbar = proposalTable.getVerticalBar();
if (scrollbar != null) {
scrollbar.removeListener(SWT.Selection, this);
}
getShell().removeListener(SWT.Deactivate, this);
getShell().removeListener(SWT.Close, this);
}
if (control != null && !control.isDisposed()) {
control.removeListener(SWT.MouseDoubleClick, this);
control.removeListener(SWT.MouseDown, this);
control.removeListener(SWT.Dispose, this);
control.removeListener(SWT.FocusOut, this);
Shell controlShell = control.getShell();
controlShell.removeListener(SWT.Move, this);
controlShell.removeListener(SWT.Resize, this);
}
}
}
/*
* The listener we will install on the target control.
*/
private final class TargetControlListener implements Listener {
// Key events from the control
public void handleEvent(Event e) {
if (!isValid()) {
return;
}
char key = e.character;
// Traverse events are handled depending on whether the
// event has a character.
if (e.type == SWT.Traverse) {
// If the traverse event contains a legitimate character,
// then we must set doit false so that the widget will
// receive the key event. We return immediately so that
// the character is handled only in the key event.
// See https://bugs.eclipse.org/bugs/show_bug.cgi?id=132101
if (key != 0) {
e.doit = false;
return;
}
// Traversal does not contain a character. Set doit true
// to indicate TRAVERSE_NONE will occur and that no key
// event will be triggered. We will check for navigation
// keys below.
e.detail = SWT.TRAVERSE_NONE;
e.doit = true;
} else {
// Default is to only propagate when configured that way.
// Some keys will always set doit to false anyway.
e.doit = adapter.getPropagateKeys();
}
// No character. Check for navigation keys.
if (key == 0) {
int newSelection = proposalTable.getSelectionIndex();
int visibleRows = (proposalTable.getSize().y / proposalTable.getItemHeight()) - 1;
switch (e.keyCode) {
case SWT.ARROW_UP:
newSelection -= 1;
if (newSelection < 0) {
newSelection = proposalTable.getItemCount() - 1;
}
// Not typical - usually we get this as a Traverse and
// therefore it never propagates. Added for consistency.
if (e.type == SWT.KeyDown) {
// don't propagate to control
e.doit = false;
}
break;
case SWT.ARROW_DOWN:
newSelection += 1;
if (newSelection > proposalTable.getItemCount() - 1) {
newSelection = 0;
}
// Not typical - usually we get this as a Traverse and
// therefore it never propagates. Added for consistency.
if (e.type == SWT.KeyDown) {
// don't propagate to control
e.doit = false;
}
break;
case SWT.PAGE_DOWN:
newSelection += visibleRows;
if (newSelection >= proposalTable.getItemCount()) {
newSelection = proposalTable.getItemCount() - 1;
}
if (e.type == SWT.KeyDown) {
// don't propagate to control
e.doit = false;
}
break;
case SWT.PAGE_UP:
newSelection -= visibleRows;
if (newSelection < 0) {
newSelection = 0;
}
if (e.type == SWT.KeyDown) {
// don't propagate to control
e.doit = false;
}
break;
case SWT.HOME:
newSelection = 0;
if (e.type == SWT.KeyDown) {
// don't propagate to control
e.doit = false;
}
break;
case SWT.END:
newSelection = proposalTable.getItemCount() - 1;
if (e.type == SWT.KeyDown) {
// don't propagate to control
e.doit = false;
}
break;
// If received as a Traverse, these should propagate
// to the control as keydown. If received as a keydown,
// proposals should be recomputed since the cursor
// position has changed.
case SWT.ARROW_LEFT:
case SWT.ARROW_RIGHT:
if (e.type == SWT.Traverse) {
e.doit = false;
} else {
e.doit = true;
String contents = adapter.getControlContentAdapter().getControlContents(control);
// If there are no contents, changes in cursor
// position have no effect. Note also that we do
// not affect the filter text on ARROW_LEFT as
// we would with BS.
if (contents.length() > 0) {
asyncRecomputeProposals();
}
}
break;
// Any unknown keycodes will cause the popup to close.
// Modifier keys are explicitly checked and ignored because
// they are not complete yet (no character).
default:
if (e.keyCode != SWT.CAPS_LOCK
&& e.keyCode != SWT.NUM_LOCK
&& e.keyCode != SWT.MOD1
&& e.keyCode != SWT.MOD2
&& e.keyCode != SWT.MOD3
&& e.keyCode != SWT.MOD4) {
close();
}
return;
}
// If any of these navigation events caused a new selection,
// then handle that now and return.
if (newSelection >= 0) {
selectProposal(newSelection);
}
return;
}
// key != 0
// Check for special keys involved in cancelling, accepting, or
// filtering the proposals.
switch (key) {
case SWT.ESC:
e.doit = false;
close();
break;
case SWT.LF:
case SWT.CR:
e.doit = false;
Object p = getSelectedProposal();
if (p != null) {
acceptCurrentProposal();
} else {
close();
}
break;
case SWT.TAB:
e.doit = false;
getShell().setFocus();
return;
case SWT.BS:
// There is no filtering provided by us, but some
// clients provide their own filtering based on content.
// Recompute the proposals if the cursor position
// will change (is not at 0).
int pos = adapter.getControlContentAdapter().getCursorPosition(control);
// We rely on the fact that the contents and pos do not yet
// reflect the result of the BS. If the contents were
// already empty, then BS should not cause
// a recompute.
if (pos > 0) {
asyncRecomputeProposals();
}
break;
default:
// If the key is a defined unicode character, and not one of
// the special cases processed above, update the filter text
// and filter the proposals.
if (Character.isDefined(key)) {
// Recompute proposals after processing this event.
asyncRecomputeProposals();
}
break;
}
}
}
/*
* Internal class used to implement the secondary popup.
*/
private class InfoPopupDialog extends PopupDialog {
/*
* The text control that displays the text.
*/
private Text text;
/*
* The String shown in the popup.
*/
private String contents = EMPTY;
/*
* Construct an info-popup with the specified parent.
*/
InfoPopupDialog(Shell parent) {
super(parent, PopupDialog.HOVER_SHELLSTYLE, false, false, false, false, false, null, null);
}
/*
* Create a text control for showing the info about a proposal.
*/
protected Control createDialogArea(Composite parent) {
text = new Text(parent, SWT.MULTI | SWT.READ_ONLY | SWT.WRAP | SWT.NO_FOCUS);
// Use the compact margins employed by PopupDialog.
GridData gd = new GridData(GridData.BEGINNING | GridData.FILL_BOTH);
gd.horizontalIndent = PopupDialog.POPUP_HORIZONTALSPACING;
gd.verticalIndent = PopupDialog.POPUP_VERTICALSPACING;
text.setLayoutData(gd);
text.setText(contents);
// since SWT.NO_FOCUS is only a hint...
text.addFocusListener(
new FocusAdapter() {
public void focusGained(FocusEvent event) {
ContentProposalPopup.this.close();
}
});
return text;
}
/*
* Adjust the bounds so that we appear adjacent to our parent shell
*/
protected void adjustBounds() {
Rectangle parentBounds = getParentShell().getBounds();
Rectangle proposedBounds;
// Try placing the info popup to the right
Rectangle rightProposedBounds =
new Rectangle(
parentBounds.x + parentBounds.width + PopupDialog.POPUP_HORIZONTALSPACING,
parentBounds.y + PopupDialog.POPUP_VERTICALSPACING,
parentBounds.width,
parentBounds.height);
rightProposedBounds = getConstrainedShellBounds(rightProposedBounds);
// If it won't fit on the right, try the left
if (rightProposedBounds.intersects(parentBounds)) {
Rectangle leftProposedBounds =
new Rectangle(
parentBounds.x - parentBounds.width - POPUP_HORIZONTALSPACING - 1,
parentBounds.y,
parentBounds.width,
parentBounds.height);
leftProposedBounds = getConstrainedShellBounds(leftProposedBounds);
// If it won't fit on the left, choose the proposed bounds
// that fits the best
if (leftProposedBounds.intersects(parentBounds)) {
if (rightProposedBounds.x - parentBounds.x >= parentBounds.x - leftProposedBounds.x) {
rightProposedBounds.x =
parentBounds.x + parentBounds.width + PopupDialog.POPUP_HORIZONTALSPACING;
proposedBounds = rightProposedBounds;
} else {
leftProposedBounds.width =
parentBounds.x - POPUP_HORIZONTALSPACING - leftProposedBounds.x;
proposedBounds = leftProposedBounds;
}
} else {
// use the proposed bounds on the left
proposedBounds = leftProposedBounds;
}
} else {
// use the proposed bounds on the right
proposedBounds = rightProposedBounds;
}
getShell().setBounds(proposedBounds);
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jface.dialogs.PopupDialog#getForeground()
*/
protected Color getForeground() {
return control.getDisplay().getSystemColor(SWT.COLOR_INFO_FOREGROUND);
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jface.dialogs.PopupDialog#getBackground()
*/
protected Color getBackground() {
return control.getDisplay().getSystemColor(SWT.COLOR_INFO_BACKGROUND);
}
/*
* Set the text contents of the popup.
*/
void setContents(String newContents) {
if (newContents == null) {
newContents = EMPTY;
}
this.contents = newContents;
if (text != null && !text.isDisposed()) {
text.setText(contents);
}
}
/*
* Return whether the popup has focus.
*/
boolean hasFocus() {
if (text == null || text.isDisposed()) {
return false;
}
return text.getShell().isFocusControl() || text.isFocusControl();
}
}
/*
* The listener installed on the target control.
*/
private Listener targetControlListener;
/*
* The listener installed in order to close the popup.
*/
private PopupCloserListener popupCloser;
/*
* The table used to show the list of proposals.
*/
private Table proposalTable;
/*
* The text used to display info under the table
*/
private Text footer;
/*
* The proposals to be shown (cached to avoid repeated requests).
*/
private ContentProposalList proposalList;
/*
* Secondary popup used to show detailed information about the selected
* proposal..
*/
private InfoPopupDialog infoPopup;
/*
* Flag indicating whether there is a pending secondary popup update.
*/
private boolean pendingDescriptionUpdate = false;
/*
* The desired size in pixels of the proposal popup.
*/
private Point popupSize;
/*
* The control for which content proposals are provided.
*/
private Control control;
/*
* A label provider used to display proposals in the popup, and to extract
* Strings from non-String proposals.
*/
private ILabelProvider labelProvider;
private ContentProposalAdapter adapter;
/**
* Constructs a new instance of this popup, specifying the control for which this popup is showing
* content, and how the proposals should be obtained and displayed.
*
* @param infoText Text to be shown in a lower info area, or <code>null</code> if there is no info
* area.
*/
ContentProposalPopup(
ContentProposalAdapter adapter,
String infoText,
ContentProposalList proposalList,
int maxDisplay) {
// IMPORTANT: Use of SWT.ON_TOP is critical here for ensuring
// that the target control retains focus on Mac and Linux. Without
// it, the focus will disappear, keystrokes will not go to the
// popup, and the popup closer will wrongly close the popup.
// On platforms where SWT.ON_TOP overrides SWT.RESIZE, we will live with this.
// See https://bugs.eclipse.org/bugs/show_bug.cgi?id=126138
super(
adapter.getControl().getShell(),
SWT.RESIZE | SWT.ON_TOP,
false,
false,
false,
false,
false,
null,
infoText);
this.adapter = adapter;
this.control = adapter.getControl();
this.labelProvider = adapter.getLabelProvider();
this.proposalList = proposalList;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jface.dialogs.PopupDialog#getForeground()
*/
protected Color getForeground() {
return JFaceResources.getColorRegistry().get(JFacePreferences.CONTENT_ASSIST_FOREGROUND_COLOR);
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jface.dialogs.PopupDialog#getBackground()
*/
protected Color getBackground() {
return JFaceResources.getColorRegistry().get(JFacePreferences.CONTENT_ASSIST_BACKGROUND_COLOR);
}
/*
* Creates the content area for the proposal popup. This creates a table and
* places it inside the composite. The table will contain a list of all the
* proposals.
*
* @param parent The parent composite to contain the dialog area; must not
* be <code>null</code>.
*/
protected final Control createDialogArea(final Composite parent) {
Composite wrapper = (Composite) super.createDialogArea(parent);
wrapper.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
wrapper.setLayout(new GridLayout());
// Use virtual where appropriate (see flag definition).
if (USE_VIRTUAL) {
proposalTable = new Table(wrapper, SWT.H_SCROLL | SWT.V_SCROLL | SWT.VIRTUAL);
Listener listener =
new Listener() {
public void handleEvent(Event event) {
handleSetData(event);
}
};
proposalTable.addListener(SWT.SetData, listener);
} else {
proposalTable = new Table(parent, SWT.H_SCROLL | SWT.V_SCROLL);
}
footer = new Text(wrapper, SWT.READ_ONLY | SWT.WRAP);
GridData textGridData = new GridData(GridData.HORIZONTAL_ALIGN_END);
textGridData.widthHint = 100;
footer.setLayoutData(textGridData);
// set the proposals to force population of the table.
setProposals(proposalList);
proposalTable.setHeaderVisible(false);
proposalTable.addSelectionListener(
new SelectionListener() {
public void widgetSelected(SelectionEvent e) {
// If a proposal has been selected, show it in the secondary
// popup. Otherwise close the popup.
if (e.item == null) {
if (infoPopup != null) {
infoPopup.close();
}
} else {
showProposalDescription();
}
}
// Default selection was made. Accept the current proposal.
public void widgetDefaultSelected(SelectionEvent e) {
acceptCurrentProposal();
}
});
return proposalTable;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jface.dialogs.PopupDialog.adjustBounds()
*/
protected void adjustBounds() {
// Get our control's location in display coordinates.
Point location = control.getDisplay().map(control.getParent(), null, control.getLocation());
int initialX = location.x + POPUP_OFFSET;
int initialY = location.y + control.getSize().y + POPUP_OFFSET;
// If we are inserting content, use the cursor position to
// position the control.
if (adapter.getProposalAcceptanceStyle() == ContentProposalAdapter.PROPOSAL_INSERT) {
Rectangle insertionBounds = adapter.getControlContentAdapter().getInsertionBounds(control);
initialX = initialX + insertionBounds.x;
initialY = location.y + insertionBounds.y + insertionBounds.height;
}
// If there is no specified size, force it by setting
// up a layout on the table.
if (popupSize == null) {
GridData data = new GridData(GridData.FILL_BOTH);
data.heightHint = proposalTable.getItemHeight() * POPUP_CHAR_HEIGHT;
data.widthHint = Math.max(control.getSize().x, POPUP_MINIMUM_WIDTH);
proposalTable.setLayoutData(data);
getShell().pack();
popupSize = getShell().getSize();
}
// Constrain to the display
Rectangle constrainedBounds =
getConstrainedShellBounds(new Rectangle(initialX, initialY, popupSize.x, popupSize.y));
// If there has been an adjustment causing the popup to overlap
// with the control, then put the popup above the control.
if (constrainedBounds.y < initialY)
getShell().setBounds(initialX, location.y - popupSize.y, popupSize.x, popupSize.y);
else getShell().setBounds(initialX, initialY, popupSize.x, popupSize.y);
// Now set up a listener to monitor any changes in size.
getShell()
.addListener(
SWT.Resize,
new Listener() {
public void handleEvent(Event e) {
popupSize = getShell().getSize();
if (infoPopup != null) {
infoPopup.adjustBounds();
}
}
});
}
/*
* Handle the set data event. Set the item data of the requested item to the
* corresponding proposal in the proposal cache.
*/
private void handleSetData(Event event) {
TableItem item = (TableItem) event.item;
int index = proposalTable.indexOf(item);
int proposalIndex = 0;
for (String provider : proposalList.getProviderList()) {
if (index == proposalIndex) {
int count = proposalList.getCount(provider);
String text = provider + " (" + count + " matching items)";
item.setText(text);
// Data == null => not selectable
item.setData(null);
Display display = Display.getCurrent();
Color color = display.getSystemColor(SWT.COLOR_GRAY);
FontData fontData = item.getFont().getFontData()[0];
Font font =
new Font(
display,
new FontData(fontData.getName(), fontData.getHeight(), SWT.ITALIC | SWT.BOLD));
item.setBackground(color);
item.setFont(font);
return;
}
proposalIndex++;
for (IContentProposal proposal : proposalList.getProposals(provider)) {
if (index == proposalIndex) {
item.setText(" " + getString(proposal));
item.setImage(getImage(proposal));
item.setData(proposal);
return;
}
proposalIndex++;
}
}
}
/*
* Caches the specified proposals and repopulates the table if it has been
* created.
*/
private void setProposals(ContentProposalList newProposalList) {
if (newProposalList == null || newProposalList.length() == 0) {
newProposalList = getEmptyProposalArray();
}
this.proposalList = newProposalList;
if (!isValid()) return;
// If there is a table
if (isValid()) {
if (USE_VIRTUAL) {
// Set and clear the virtual table. Data will be
// provided in the SWT.SetData event handler.
proposalTable.setItemCount(getTableLength());
proposalTable.clearAll();
} else {
// Populate the table manually
proposalTable.setRedraw(false);
int itemCount = newProposalList.length() + newProposalList.getProviderList().size();
proposalTable.setItemCount(itemCount);
TableItem[] items = proposalTable.getItems();
int index = 0;
for (String provider : newProposalList.getProviderList()) {
TableItem item = items[index];
int count = newProposalList.getCount(provider);
String text = provider + " (" + count + " matching items)";
item.setText(text);
// Data == null => not selectable
item.setData(null);
Display display = Display.getCurrent();
Color color = display.getSystemColor(SWT.COLOR_GRAY);
FontData fontData = item.getFont().getFontData()[0];
Font font =
new Font(
display,
new FontData(fontData.getName(), fontData.getHeight(), SWT.ITALIC | SWT.BOLD));
item.setBackground(color);
item.setFont(font);
index++;
for (IContentProposal proposal : newProposalList.getProposals(provider)) {
item.setText(" " + getString(proposal));
item.setImage(getImage(proposal));
item.setData(proposal);
index++;
}
}
proposalTable.setRedraw(true);
}
// Default to the first selection if there is content.
if (newProposalList.length() > 0) {
int index = 0;
boolean selected = false;
for (String provider : newProposalList.getProviderList()) {
index++;
if (!selected && newProposalList.getCount(provider) > 0) {
selectProposal(index);
selected = true;
}
}
} else {
// No selection, close the secondary popup if it was open
if (infoPopup != null) {
infoPopup.close();
}
}
}
footer.setText("");
}
private int getTableLength() {
if (proposalList == null) return 0;
return proposalList.length() + proposalList.getProviderList().size();
}
/*
* Get the string for the specified proposal. Always return a String of some
* kind.
*/
private String getString(IContentProposal proposal) {
if (proposal == null) {
return EMPTY;
}
if (labelProvider == null) {
return proposal.getLabel() == null ? proposal.getContent() : proposal.getLabel();
}
return labelProvider.getText(proposal);
}
/*
* Get the image for the specified proposal. If there is no image available,
* return null.
*/
private Image getImage(IContentProposal proposal) {
if (proposal == null || labelProvider == null) {
return null;
}
return labelProvider.getImage(proposal);
}
/*
* Return an empty array. Used so that something always shows in the
* proposal popup, even if no proposal provider was specified.
*/
private ContentProposalList getEmptyProposalArray() {
return new ContentProposalList();
}
/*
* Answer true if the popup is valid, which means the table has been created
* and not disposed.
*/
private boolean isValid() {
return proposalTable != null && !proposalTable.isDisposed();
}
/*
* Return whether the receiver has focus. Since 3.4, this includes a check
* for whether the info popup has focus.
*/
public boolean hasFocus() {
if (!isValid()) {
return false;
}
if (getShell().isFocusControl() || proposalTable.isFocusControl()) {
return true;
}
if (infoPopup != null && infoPopup.hasFocus()) {
return true;
}
return false;
}
/*
* Return the current selected proposal.
*/
private IContentProposal getSelectedProposal() {
if (isValid()) {
int index = proposalTable.getSelectionIndex();
if (proposalList == null || index < 0 || index >= getTableLength()) {
return null;
}
int proposalIndex = 0;
for (String provider : proposalList.getProviderList()) {
if (index == proposalIndex) {
return null;
}
proposalIndex++;
for (IContentProposal proposal : proposalList.getProposals(provider)) {
if (index == proposalIndex) {
return proposal;
}
proposalIndex++;
}
}
}
return null;
}
/*
* Select the proposal at the given index.
*/
private void selectProposal(int index) {
Assert.isTrue(index >= 0, "Proposal index should never be negative"); // $NON-NLS-1$
if (!isValid() || proposalList == null || index >= getTableLength()) {
return;
}
proposalTable.setSelection(index);
proposalTable.showSelection();
showProposalDescription();
}
/**
* Opens this ContentProposalPopup. This method is extended in order to add the control listener
* when the popup is opened and to invoke the secondary popup if applicable.
*
* @return the return code
* @see org.eclipse.jface.window.Window#open()
*/
public int open() {
int value = super.open();
if (popupCloser == null) {
popupCloser = new PopupCloserListener();
}
popupCloser.installListeners();
IContentProposal p = getSelectedProposal();
if (p != null) {
showProposalDescription();
}
return value;
}
/**
* Closes this popup. This method is extended to remove the control listener.
*
* @return <code>true</code> if the window is (or was already) closed, and <code>false</code> if
* it is still open
*/
public boolean close() {
popupCloser.removeListeners();
if (infoPopup != null) {
infoPopup.close();
}
boolean ret = super.close();
adapter.notifyPopupClosed();
return ret;
}
/*
* Show the currently selected proposal's description in a secondary popup.
*/
private void showProposalDescription() {
// If we do not already have a pending update, then
// create a thread now that will show the proposal description
if (!pendingDescriptionUpdate) {
// Create a thread that will sleep for the specified delay
// before creating the popup. We do not use Jobs since this
// code must be able to run independently of the Eclipse
// runtime.
Runnable runnable =
new Runnable() {
public void run() {
pendingDescriptionUpdate = true;
try {
Thread.sleep(POPUP_DELAY);
} catch (InterruptedException e) {
}
if (!isValid()) {
return;
}
getShell()
.getDisplay()
.syncExec(
new Runnable() {
public void run() {
// Query the current selection since we have
// been delayed
IContentProposal p = getSelectedProposal();
if (p != null) {
String description = p.getDescription();
if (description != null) {
if (infoPopup == null) {
infoPopup = new InfoPopupDialog(getShell());
infoPopup.open();
infoPopup
.getShell()
.addDisposeListener(
new DisposeListener() {
public void widgetDisposed(DisposeEvent event) {
infoPopup = null;
}
});
}
infoPopup.setContents(p.getDescription());
} else if (infoPopup != null) {
infoPopup.close();
}
pendingDescriptionUpdate = false;
}
}
});
}
};
Thread t = new Thread(runnable);
t.start();
}
}
/*
* Accept the current proposal.
*/
private void acceptCurrentProposal() {
// Close before accepting the proposal. This is important
// so that the cursor position can be properly restored at
// acceptance, which does not work without focus on some controls.
// See https://bugs.eclipse.org/bugs/show_bug.cgi?id=127108
IContentProposal proposal = getSelectedProposal();
close();
if (proposal != null) {
adapter.proposalAccepted(proposal);
}
}
/*
* Request the proposals from the proposal provider, and recompute any
* caches. Repopulate the popup if it is open.
*/
private void recomputeProposals(ContentProposalList newProposalList) {
if (newProposalList == null) newProposalList = getEmptyProposalArray();
// If the non-filtered proposal list is empty, we should close the popup.
// See https://bugs.eclipse.org/bugs/show_bug.cgi?id=147377
if (newProposalList.length() == 0) {
this.proposalList = newProposalList;
close();
} else {
// Keep the popup open, but filter by any provided filter text
setProposals(newProposalList);
}
}
/*
* In an async block, request the proposals. This is used when clients are
* in the middle of processing an event that affects the widget content. By
* using an async, we ensure that the widget content is up to date with the
* event.
*/
private void asyncRecomputeProposals() {
footer.setText("Searching...");
if (isValid()) {
control
.getDisplay()
.asyncExec(
new Runnable() {
public void run() {
adapter.recordCursorPosition();
adapter.getProposals(
new IContentProposalSearchHandler() {
@Override
public void handleResult(ContentProposalList proposalList) {
recomputeProposals(proposalList);
}
});
}
});
} else {
adapter.getProposals(
new IContentProposalSearchHandler() {
@Override
public void handleResult(ContentProposalList proposalList) {
recomputeProposals(proposalList);
}
});
}
}
Listener getTargetControlListener() {
if (targetControlListener == null) {
targetControlListener = new TargetControlListener();
}
return targetControlListener;
}
public Point getPopupSize() {
return popupSize;
}
public void setPopupSize(Point size) {
popupSize = size;
}
}
