Example usage for org.eclipse.jface.bindings.keys KeySequence startsWith

Introduction

In this page you can find the example usage for org.eclipse.jface.bindings.keys KeySequence startsWith.

Prototype

public final boolean startsWith(final TriggerSequence triggerSequence, final boolean equals) 

Source Link

Document

Returns whether or not this trigger sequence starts with the given trigger sequence.

Usage

From source file:com.reprezen.swagedit.core.editor.outline.QuickOutline.java

License:Open Source License

protected boolean isInvocationEvent(KeyEvent e) {
    int accelerator = SWTKeySupport.convertEventToUnmodifiedAccelerator(e);
    KeySequence keySequence = KeySequence.getInstance(SWTKeySupport.convertAcceleratorToKeyStroke(accelerator));

    return keySequence.startsWith(triggerSequence, true);
}

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From source file:org.eclipse.ui.internal.keys.KeyAssistDialog.java

License:Open Source License

/**
 * Returns a string representing the key sequence used to open this dialog.
 *
 * @return the string describing the key sequence, or <code>null</code> if
 *         it cannot be determined./*from www. ja v a  2s .c om*/
 */
private String getKeySequenceString() {
    final Command command = commandService.getCommand(IWorkbenchCommandConstants.WINDOW_SHOW_KEY_ASSIST);
    final TriggerSequence[] keyBindings = bindingService
            .getActiveBindingsFor(new ParameterizedCommand(command, null));
    final int keyBindingsCount = keyBindings.length;
    final KeySequence currentState = keyBindingState.getCurrentSequence();
    final int prefixSize = currentState.getKeyStrokes().length;

    // Try to find the first possible matching key binding.
    KeySequence keySequence = null;
    for (int i = 0; i < keyBindingsCount; i++) {
        keySequence = (KeySequence) keyBindings[i];

        // Now just double-check to make sure the key is still possible.
        if (prefixSize > 0) {
            if (keySequence.startsWith(currentState, false)) {
                /*
                 * Okay, so we have a partial match. Replace the key binding
                 * with the required suffix completion.
                 */
                final KeyStroke[] oldKeyStrokes = keySequence.getKeyStrokes();
                final int newSize = oldKeyStrokes.length - prefixSize;
                final KeyStroke[] newKeyStrokes = new KeyStroke[newSize];
                System.arraycopy(oldKeyStrokes, prefixSize, newKeyStrokes, 0, newSize);
                keySequence = KeySequence.getInstance(newKeyStrokes);
                break;
            }

            /*
             * The prefix doesn't match, so null out the key binding and try
             * again.
             */
            keySequence = null;
            continue;

        }

        // There is no prefix, so just grab the first.
        break;
    }
    if (keySequence == null) {
        return null; // couldn't find a suitable key binding
    }
    // RAP [if]: need session aware messages
    //      return NLS.bind(KeyAssistMessages.openPreferencePage, keySequence
    //            .format());
    return NLS.bind(KeyAssistMessages.get().openPreferencePage, keySequence.format());
}

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