/**
* 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;
}
/*
* 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);
}
});
}
}
/*
* (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();
}
}
});
}
/**
* 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;
}
/*
* 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);
}
}