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https://github.com/NationalSecurityAgency/ghidra
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Merge remote-tracking branch
'origin/GP-2616-dragonmacher-patch-window-npe' (Closes #4604)
This commit is contained in:
commit
7641a386a1
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@ -36,7 +36,7 @@ import ghidra.util.task.SwingUpdateManager;
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/**
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* An autocompleter that may be attached to one or more {@link JTextField}.
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*
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*
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* <p>
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* Each autocompleter instance has one associated window (displaying the list of suggestions) and
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* one associated model (generating the list of suggestions). Thus, the list can only be active on
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@ -44,7 +44,7 @@ import ghidra.util.task.SwingUpdateManager;
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* for one autocompleter to be reused on many fields. Behavior is undefined when multiple
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* autocompleters are attached to the same text field. More likely, you should implement a composite
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* model if you wish to present completions from multiple models on a single text field.
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*
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*
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* <p>
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* By default, the autocompleter is activated when the user presses CTRL-SPACE, at which point, the
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* model is queried for possible suggestions. The completer gives the model all the text preceding
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@ -56,7 +56,7 @@ import ghidra.util.task.SwingUpdateManager;
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* positioning behavior can be modified by overriding the {@link #getCompletionWindowPosition()}
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* method. As a convenience, the {@link #getCaretPositionOnScreen(JTextField)} method is available
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* to compute the default position.
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*
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*
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* <p>
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* Whether or not the list is currently displayed, when the user presses CTRL-SPACE, if only one
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* completion is possible, it is automatically activated. This logic is applied again and again,
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@ -65,20 +65,20 @@ import ghidra.util.task.SwingUpdateManager;
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* by overriding the {@link #getCompletionCanDefault(Object) getCompletionCanDefault(T)} method.
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* This same behavior can be activated by calling the {@link #startCompletion(JTextField)} method,
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* which may be useful, e.g., to bind a different key sequence to start autocompletion.
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*
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*
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* <p>
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* The appearance of each item in the suggestion list can be modified by overriding the various
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* {@code getCompletion...} methods. Note that it's possible for an item to be displayed one way,
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* but cause the insertion of different text. In any case, it is best to ensure any modification
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* produces an intuitive behavior.
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*
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*
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* <p>
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* The simplest use case is to create a text field, create an autocompleter with a custom model, and
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* then attach and show.
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*
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*
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* <pre>
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* JTextField field = new JTextField();
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*
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*
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* AutocompletionModel<String> model = new AutocompletionModel<String>() {
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* @Override
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* public Collection<String> computeCompletions(String text) {
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@ -88,9 +88,9 @@ import ghidra.util.task.SwingUpdateManager;
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* TextFieldAutocompleter<String> completer = new TextFieldAutocompleter<String>(model);
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* completer.attachTo(field);
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* // ... Add the field to, e.g., a dialog, and show.
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*
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*
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* </pre>
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*
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*
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* @param <T> the type of suggestions presented by this autocompleter.
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*/
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public class TextFieldAutocompleter<T> {
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@ -267,7 +267,7 @@ public class TextFieldAutocompleter<T> {
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/**
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* Create a new autocompleter associated with the given model.
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*
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*
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* @param model the model giving the suggestions.
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*/
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public TextFieldAutocompleter(AutocompletionModel<T> model) {
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@ -276,7 +276,7 @@ public class TextFieldAutocompleter<T> {
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/**
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* Recompute the display location and move with list window.
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*
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*
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* <p>
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* This is useful, e.g., when the window containing the associated text field(s) moves.
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*/
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@ -288,7 +288,7 @@ public class TextFieldAutocompleter<T> {
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/**
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* Update the contents of the suggestion list.
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*
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*
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* <p>
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* This entails taking the prefix, querying the model, and rendering the list.
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*/
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@ -336,6 +336,11 @@ public class TextFieldAutocompleter<T> {
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* Build the completion window, parented to the attached field that last had focus.
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*/
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protected void buildCompletionWindow() {
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if (focus == null) {
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// shouldn't happen; likely some off focus issue
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return;
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}
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completionWindow = new JWindow(WindowUtilities.windowForComponent(focus));
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completionWindow.add(content);
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content.setVisible(true);
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@ -352,7 +357,7 @@ public class TextFieldAutocompleter<T> {
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/**
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* Show or hide the completion list window
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*
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*
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* @param visible true to show, false to hide
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*/
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public void setCompletionListVisible(boolean visible) {
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@ -373,10 +378,10 @@ public class TextFieldAutocompleter<T> {
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/**
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* Check if the completion list window is visible.
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*
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*
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* <p>
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* If it is visible, this implies that the user is actively using the autocompleter.
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*
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*
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* @return true if shown, false if hidden.
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*/
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public boolean isCompletionListVisible() {
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@ -388,12 +393,14 @@ public class TextFieldAutocompleter<T> {
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*/
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private void doUpdateDisplayLocation() {
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Point p = getCompletionWindowPosition();
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completionWindow.setLocation(p);
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if (p != null) {
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completionWindow.setLocation(p);
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}
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}
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/**
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* Gets the prefix from the given text field, used to query the model.
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*
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*
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* @param field an attached field, usually the one with focus.
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* @return the prefix to use as the query.
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*/
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@ -408,13 +415,13 @@ public class TextFieldAutocompleter<T> {
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/**
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* Get the preferred location (on screen) of the completion list window.
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*
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*
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* <p>
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* Typically, this is a location near the focused field. Ideally, it is positioned such that the
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* displayed suggestions coincide with the applicable text in the focused field. For example, if
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* the suggestions display some portion of the prefix, the window could be positioned such that
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* the portion in the suggestion appears directly below the same portion in the field.
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*
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*
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* @return the point giving the top-left corner of the completion window
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*/
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protected Point getCompletionWindowPosition() {
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@ -423,24 +430,31 @@ public class TextFieldAutocompleter<T> {
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/**
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* Get the preferred dimensions of the completion list window.
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*
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*
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* <p>
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* Typically, this is the width of the focused field.
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*
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*
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* @return the dimension giving the preferred height and width. A value can be -1 to indicate no
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* preference.
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*/
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protected Dimension getDefaultCompletionWindowDimension() {
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if (focus == null) {
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return new Dimension(-1, -1);
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}
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return new Dimension(focus.getWidth(), -1);
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}
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/**
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* A convenience function that returns the bottom on-screen position of the given field's caret.
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*
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*
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* @param field the field, typically the one having focus
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* @return the on-screen position of the caret's bottom.
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* @return the on-screen position of the caret's bottom; null if the given field is null
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*/
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protected Point getCaretPositionOnScreen(JTextField field) {
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if (focus == null) {
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return null;
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}
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FontMetrics metrics = field.getFontMetrics(field.getFont());
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Caret c = field.getCaret();
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Point p = c.getMagicCaretPosition(); // returns a shared reference
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@ -457,14 +471,14 @@ public class TextFieldAutocompleter<T> {
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/**
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* Builds the list cell renderer for the autocompletion list.
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*
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*
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* <p>
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* A programmer may override this if the various {@code getCompletion...} methods prove
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* insufficient for customizing the display of the suggestions. Please remember that
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* {@link JLabel}s can render HTML, so {@link #getCompletionDisplay(Object)
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* getCompletionDisplay(T)} is quite powerful with the default
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* {@link AutocompletionCellRenderer}.
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*
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*
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* @return a list cell renderer for the completion list.
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*/
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protected ListCellRenderer<? super T> buildListCellRenderer() {
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@ -473,10 +487,10 @@ public class TextFieldAutocompleter<T> {
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/**
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* Attach the autocompleter to the given text field.
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*
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*
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* <p>
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* If this method is never called, then the autocompleter can never appear.
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*
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*
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* @param field the field that will gain this autocompletion feature
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* @return true, if this field is not already attached
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*/
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@ -502,7 +516,7 @@ public class TextFieldAutocompleter<T> {
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/**
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* Deprive the given field of this autocompleter.
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*
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*
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* @param field the field that will lose this autocompletion feature
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* @return true, if this field was actually attached
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*/
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@ -520,7 +534,7 @@ public class TextFieldAutocompleter<T> {
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/**
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* Cause the currently-selected suggestion to be activated.
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*
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*
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* <p>
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* By default, this is called when the user presses ENTER or clicks a suggestion.
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*/
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@ -535,12 +549,12 @@ public class TextFieldAutocompleter<T> {
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/**
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* Fire the registered autocompletion listeners on the given event.
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*
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*
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* <p>
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* Each registered listener is invoked in order of registration. If any listener consumes the
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* event, then later-registered listeners will not be notified of the event. If any listener
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* cancels the event, then the suggested text will not be inserted.
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*
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*
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* @param ev the event
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* @return true, if no listener cancelled the event
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*/
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@ -555,14 +569,18 @@ public class TextFieldAutocompleter<T> {
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}
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private void completionActivated(T sel) {
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if (focus == null) {
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// shouldn't happen; likely some off focus issue
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return;
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}
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AutocompletionEvent<T> ev = new AutocompletionEvent<>(sel, focus);
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if (!fireAutocompletionListeners(ev)) {
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return;
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}
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try {
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focus.getDocument()
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.insertString(focus.getCaretPosition(), getCompletionText(sel),
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null);
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.insertString(focus.getCaretPosition(), getCompletionText(sel), null);
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}
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catch (BadLocationException e) {
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throw new AssertionError("INTERNAL: Should not be here", e);
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@ -571,7 +589,7 @@ public class TextFieldAutocompleter<T> {
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/**
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* Register the given auto-completion listener
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*
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*
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* @param l the listener to register
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*/
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public void addAutocompletionListener(AutocompletionListener<T> l) {
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@ -580,7 +598,7 @@ public class TextFieldAutocompleter<T> {
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/**
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* Unregister the given auto-completion listener
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*
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*
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* @param l the listener to unregister
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*/
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public void removeAutocompletionListener(AutocompletionListener<T> l) {
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@ -589,7 +607,7 @@ public class TextFieldAutocompleter<T> {
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/**
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* Get all the registered auto-completion listeners
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*
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*
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* @return an array of registered listeners
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*/
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@SuppressWarnings("unchecked")
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@ -599,7 +617,7 @@ public class TextFieldAutocompleter<T> {
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/**
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* Get all registered listeners of the given type
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*
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*
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* @param listenerType the type of listeners to get
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* @return an array of registered listeners
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*/
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@ -613,7 +631,7 @@ public class TextFieldAutocompleter<T> {
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/**
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* Get the text to insert when the given suggestion is activated
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*
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*
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* @param sel the activated suggestion
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* @return the text to insert
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*/
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@ -623,7 +641,7 @@ public class TextFieldAutocompleter<T> {
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/**
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* Get the (possibly HTML) text to display for the given suggestion in the list
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*
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*
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* @param sel the suggestion to display
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* @return the text or HTML representing the suggestion
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*/
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@ -633,7 +651,7 @@ public class TextFieldAutocompleter<T> {
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/**
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* Get the foreground color to display for the given suggestion in the list
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*
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*
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* @param sel the suggestion to display
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* @param isSelected true if the suggestion is currently selected
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* @param cellHasFocus true if the suggestion currently has focus
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@ -645,7 +663,7 @@ public class TextFieldAutocompleter<T> {
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/**
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* Get the background color to display for the given suggestion in the list
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*
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*
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* @param sel the suggestion to display
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* @param isSelected true if the suggestion is currently selected
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* @param cellHasFocus true if the suggestion currently has focus
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@ -657,7 +675,7 @@ public class TextFieldAutocompleter<T> {
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/**
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* Get the icon to display with the given suggestion in the list
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*
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*
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* @param sel the suggestion to display
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* @param isSelected true if the suggestion is currently selected
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* @param cellHasFocus true if the suggestion currently has focus
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@ -669,7 +687,7 @@ public class TextFieldAutocompleter<T> {
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/**
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* Get the font for the given suggestion in the list
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*
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*
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* @param sel the suggestion to display
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* @param isSelected true if the suggestion is currently selected
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* @param cellHasFocus true if the suggestion currently has focus
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@ -684,7 +702,7 @@ public class TextFieldAutocompleter<T> {
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/**
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* Decide whether the given suggestion can be automatically activated.
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*
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*
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* <p>
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* When autocompletion is started (via {@link #startCompletion(JTextField)}) or when the user
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* presses CTRL-SPACE, if there is only a single suggestion, it is taken automatically, and the
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|
@ -692,7 +710,7 @@ public class TextFieldAutocompleter<T> {
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* it calls this method. If it returns false, the single suggestion is displayed in a 1-long
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* list instead. This is useful to prevent consequential actions from being automatically
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* activated by the autocompleter.
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*
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*
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* @param sel the potentially auto-activated suggestion.
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* @return true to permit auto-activation, false to prevent it.
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*/
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@ -702,17 +720,17 @@ public class TextFieldAutocompleter<T> {
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/**
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* Starts the autocompleter on the given text field.
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*
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*
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* <p>
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* First, this repeatedly attempts auto-activation. When there are many suggestions, or when
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* auto-activation is prevented (see {@link #getCompletionCanDefault(Object)
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* getCompletionCanDefault(T)}), a list is displayed (usually below the caret) containing the
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* suggestions given the fields current contents. The list remains open until either the user
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* cancels it (usually via ESC) or the user activates a suggestion.
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*
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*
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* <p>
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* <b>NOTE:</b> The text field must already be attached.
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*
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*
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||||
* @param field the field on which to start autocompletion.
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*/
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public void startCompletion(JTextField field) {
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|
@ -765,7 +783,7 @@ public class TextFieldAutocompleter<T> {
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/**
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* Cause the suggestion at the given index to be selected
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*
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*
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* @param index the index of the selection
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*/
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public void select(int index) {
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|
@ -852,7 +870,7 @@ public class TextFieldAutocompleter<T> {
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/**
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* Get the list of suggestions as ordered on screen
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*
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*
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* @return an immutable copy of the list
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*/
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public List<T> getSuggestions() {
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|
@ -1012,7 +1030,7 @@ public class TextFieldAutocompleter<T> {
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/**
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* A demonstration of the autocompleter on a single text field.
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*
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*
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* <p>
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||||
* The autocompleter offers the tails from a list of strings that start with the text before the
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* caret.
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|
@ -1056,7 +1074,7 @@ public class TextFieldAutocompleter<T> {
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/**
|
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* A demonstration of the autocompleter on two linked text fields.
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*
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*
|
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* <p>
|
||||
* This demo was designed to test whether the autocompleter and the {@link TextFieldLinker}
|
||||
* could be composed correctly.
|
||||
|
|
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