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- /*
- * Copyright (c) 2006-2017 DMDirc Developers
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
- * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
- * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
- * permit persons to whom the Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
- * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS
- * OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
- * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
- package com.dmdirc.ui;
-
- import com.dmdirc.CustomWindow;
- import com.dmdirc.Precondition;
- import com.dmdirc.events.FrameClosingEvent;
- import com.dmdirc.events.FrameOpenedEvent;
- import com.dmdirc.events.eventbus.EventBus;
- import com.dmdirc.interfaces.WindowModel;
- import com.dmdirc.interfaces.ui.FrameListener;
- import com.dmdirc.util.collections.ListenerList;
-
- import com.google.common.collect.ArrayListMultimap;
- import com.google.common.collect.Multimap;
-
- import java.util.Collection;
- import java.util.Collections;
- import java.util.HashMap;
- import java.util.Map;
- import java.util.Optional;
- import java.util.concurrent.CopyOnWriteArrayList;
- import java.util.concurrent.atomic.AtomicLong;
-
- import javax.inject.Inject;
- import javax.inject.Singleton;
-
- import net.engio.mbassy.listener.Handler;
-
- import static com.google.common.base.Preconditions.checkArgument;
- import static com.google.common.base.Preconditions.checkNotNull;
-
- /**
- * The WindowManager maintains a list of all open windows, and their parent/child relations.
- */
- @Singleton
- public class WindowManager {
-
- /** A list of root windows. */
- private final Collection<WindowModel> rootWindows = new CopyOnWriteArrayList<>();
- /** Mapping of windows to their parents. */
- private final Map<WindowModel, WindowModel> parents = new HashMap<>();
- /** Mapping of parents to their children. */
- private final Multimap<WindowModel, WindowModel> children = ArrayListMultimap.create();
- /** Mapping of IDs to windows. */
- private final Map<String, WindowModel> windowsById = new HashMap<>();
- /** A list of frame listeners. */
- private final ListenerList listeners = new ListenerList();
- /** Counter to use for ID assignments. */
- private final AtomicLong nextId = new AtomicLong(0L);
- /** Event bus to dispatch window events on. */
- private final EventBus eventBus;
-
- /**
- * Creates a new instance of {@link WindowManager}.
- */
- @Inject
- public WindowManager(final EventBus eventBus) {
- this.eventBus = eventBus;
- eventBus.subscribe(this);
- }
-
- /**
- * Registers a FrameListener with the WindowManager.
- *
- * @param frameListener The frame listener to be registered
- */
- @Precondition("The specified FrameListener is not null")
- public void addListener(final FrameListener frameListener) {
- checkNotNull(frameListener);
-
- listeners.add(FrameListener.class, frameListener);
- }
-
- /**
- * Registers a FrameListener with the WindowManager, and then calls the relevant methods on it
- * for all existing windows.
- *
- * @param frameListener The frame listener to be registered
- *
- * @since 0.6.6
- */
- @Precondition("The specified FrameListener is not null")
- public void addListenerAndSync(final FrameListener frameListener) {
- addListener(frameListener);
-
- for (WindowModel root : rootWindows) {
- frameListener.addWindow(root, true);
-
- for (WindowModel child : getChildren(root)) {
- fireAddWindow(frameListener, root, child);
- }
- }
- }
-
- /**
- * Recursively fires the addWindow callback for the specified windows and listener.
- *
- * @param listener The listener to be fired
- * @param parent The parent window
- * @param child The new child window that was added
- *
- */
- private void fireAddWindow(final FrameListener listener,
- final WindowModel parent, final WindowModel child) {
- listener.addWindow(parent, child, true);
-
- for (WindowModel grandchild : getChildren(child)) {
- fireAddWindow(listener, child, grandchild);
- }
- }
-
- /**
- * Unregisters a FrameListener with the WindowManager.
- *
- * @param frameListener The frame listener to be removed
- */
- public void removeListener(final FrameListener frameListener) {
- listeners.remove(FrameListener.class, frameListener);
- }
-
- /**
- * Gets the parent of the specified window, if there is one.
- *
- * @param window The window to find the parent of.
- * @return The window's parent, if one exists.
- */
- public Optional<WindowModel> getParent(final WindowModel window) {
- return Optional.ofNullable(parents.get(window));
- }
-
- /**
- * Gets the collection of children belonging to the specified window.
- *
- * @param window The window to find the children on.
- * @return A (possibly empty) collection of children of the given window.
- */
- public Collection<WindowModel> getChildren(final WindowModel window) {
- return Collections.unmodifiableCollection(children.get(window));
- }
-
- /**
- * Adds a new root window to the Window Manager.
- *
- * @param window The window to be added
- *
- * @since 0.6.4
- */
- @Precondition({
- "The specified Window is not null",
- "The specified Window has not already been added"
- })
- public void addWindow(final WindowModel window) {
- addWindow(window, true);
- }
-
- /**
- * Adds a new root window to the Window Manager.
- *
- * @param window The window to be added
- * @param focus Should this window become focused
- *
- * @since 0.6.4
- */
- @Precondition({
- "The specified Window is not null",
- "The specified Window has not already been added"
- })
- public void addWindow(final WindowModel window, final boolean focus) {
- checkNotNull(window);
- checkArgument(!rootWindows.contains(window));
-
- rootWindows.add(window);
- assignId(window);
- fireAddWindow(window, focus);
- }
-
- /**
- * Adds a new child window to the Window Manager.
- *
- * @param parent The parent window
- * @param child The child window to be added
- *
- * @since 0.6.4
- */
- @Precondition("The specified Windows are not null")
- public void addWindow(final WindowModel parent, final WindowModel child) {
- addWindow(parent, child, true);
- }
-
- /**
- * Adds a new child window to the Window Manager.
- *
- * @param parent The parent window
- * @param child The child window to be added
- * @param focus Should this window become focused
- *
- * @since 0.6.4
- */
- @Precondition({
- "The specified containers are not null",
- "The specified parent is in the window hierarchy already",
- "The specified child is NOT in the window hierarchy already"
- })
- public void addWindow(final WindowModel parent, final WindowModel child, final boolean focus) {
- checkNotNull(parent);
- checkArgument(isInHierarchy(parent));
- checkNotNull(child);
-
- parents.put(child, parent);
- children.put(parent, child);
- assignId(child);
- fireAddWindow(parent, child, focus);
- }
-
- /**
- * Recursively determines if the specified target is in the known hierarchy of containers. That
- * is, whether or not the specified target or any of its parents are root windows.
- *
- * @since 0.6.4
- * @param target The container to be tested
- *
- * @return True if the target is in the hierarchy, false otherwise
- */
- private boolean isInHierarchy(final WindowModel target) {
- return rootWindows.contains(target) || parents.containsKey(target);
- }
-
- /**
- * Removes a window from the Window Manager. If the specified window has child windows, they are
- * recursively removed before the target window. If the window hasn't previously been added, the
- * request to remove it is ignored.
- *
- * @param window The window to be removed
- *
- * @since 0.6.4
- */
- @Precondition({
- "The specified window is not null",
- "The specified window is in the window hierarchy"
- })
- public void removeWindow(final WindowModel window) {
- checkNotNull(window);
- checkArgument(isInHierarchy(window));
-
- children.get(window).forEach(WindowModel::close);
- children.removeAll(window);
- windowsById.remove(window.getId());
-
- if (rootWindows.contains(window)) {
- fireDeleteWindow(window);
- rootWindows.remove(window);
- } else {
- final WindowModel parent = parents.get(window);
- fireDeleteWindow(parent, window);
- parents.remove(parent);
- }
- }
-
- /**
- * Finds and returns a global custom window with the specified name. If a custom window with the
- * specified name isn't found, null is returned.
- *
- * @param name The name of the custom window to search for
- *
- * @return The specified custom window, or null
- */
- @Precondition("The specified window name is not null")
- public WindowModel findCustomWindow(final String name) {
- checkNotNull(name);
-
- return findCustomWindow(rootWindows, name);
- }
-
- /**
- * Finds and returns a non-global custom window with the specified name. If a custom window with
- * the specified name isn't found, null is returned.
- *
- * @param parent The parent whose children should be searched
- * @param name The name of the custom window to search for
- *
- * @return The specified custom window, or null
- */
- @Precondition({
- "The specified window name is not null",
- "The specified parent window is not null",
- "The specified parent window has been added to the Window Manager"
- })
- public WindowModel findCustomWindow(final WindowModel parent, final String name) {
- checkNotNull(parent);
- checkNotNull(name);
-
- return findCustomWindow(getChildren(parent), name);
- }
-
- /**
- * Finds a custom window with the specified name among the specified list of windows. If the
- * custom window is not found, returns null.
- *
- * @param windows The list of windows to search
- * @param name The name of the custom window to search for
- *
- * @return The custom window if found, or null otherwise
- */
- private WindowModel findCustomWindow(final Iterable<WindowModel> windows, final String name) {
- for (WindowModel window : windows) {
- if (window instanceof CustomWindow && window.getName().equals(name)) {
- return window;
- }
- }
-
- return null;
- }
-
- /**
- * Retrieves all known root (parent-less) windows.
- *
- * @since 0.6.4
- * @return A collection of all known root windows.
- */
- public Collection<WindowModel> getRootWindows() {
- return Collections.unmodifiableCollection(rootWindows);
- }
-
- /**
- * Retrieves the window with the specified ID.
- *
- * @param id The ID of the window to retrieve
- * @return The window with the given ID, if it exists.
- */
- public Optional<WindowModel> getWindowById(final String id) {
- return Optional.ofNullable(windowsById.get(id));
- }
-
- /**
- * Assigns a unique ID to the given window.
- *
- * @param window The window to assign an ID to.
- */
- private void assignId(final WindowModel window) {
- final String id = "WINDOW/" + nextId.getAndIncrement();
- window.setId(id);
- windowsById.put(id, window);
- }
-
- /**
- * Fires the addWindow(Window) callback.
- *
- * @param window The window that was added
- * @param focus Should this window become focused
- */
- private void fireAddWindow(final WindowModel window, final boolean focus) {
- eventBus.publishAsync(new FrameOpenedEvent(window));
- for (FrameListener listener : listeners.get(FrameListener.class)) {
- listener.addWindow(window, focus);
- }
- }
-
- /**
- * Fires the addWindow(Window, Window) callback.
- *
- * @param parent The parent window
- * @param child The new child window that was added
- * @param focus Should this window become focused
- *
- */
- private void fireAddWindow(final WindowModel parent,
- final WindowModel child, final boolean focus) {
- eventBus.publishAsync(new FrameOpenedEvent(child, parent));
- for (FrameListener listener : listeners.get(FrameListener.class)) {
- listener.addWindow(parent, child, focus);
- }
- }
-
- /**
- * Fires the delWindow(Window) callback.
- *
- * @param window The window that was removed
- */
- private void fireDeleteWindow(final WindowModel window) {
- for (FrameListener listener : listeners.get(FrameListener.class)) {
- listener.delWindow(window);
- }
- }
-
- /**
- * Fires the delWindow(Window, Window) callback.
- *
- * @param parent The parent window
- * @param child The child window that was removed
- */
- private void fireDeleteWindow(final WindowModel parent, final WindowModel child) {
- for (FrameListener listener : listeners.get(FrameListener.class)) {
- listener.delWindow(parent, child);
- }
- }
-
- @Handler
- public void frameClosing(final FrameClosingEvent event) {
- removeWindow(event.getSource());
- }
-
- }
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