Upstream oodles of Chrome for Android code into Chromium.

chrome/android/java_staging/src/org/chromium/chrome/browser/KeyboardShortcuts.java

Index: chrome/android/java_staging/src/org/chromium/chrome/browser/KeyboardShortcuts.java
diff --git a/chrome/android/java_staging/src/org/chromium/chrome/browser/KeyboardShortcuts.java b/chrome/android/java_staging/src/org/chromium/chrome/browser/KeyboardShortcuts.java
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+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser;
+
+import android.view.KeyEvent;
+
+import com.google.android.apps.chrome.R;
+
+import org.chromium.base.annotations.SuppressFBWarnings;
+import org.chromium.chrome.browser.tabmodel.ChromeTabCreator;
+import org.chromium.chrome.browser.tabmodel.TabModel;
+import org.chromium.chrome.browser.tabmodel.TabModel.TabLaunchType;
+import org.chromium.chrome.browser.tabmodel.TabModelUtils;
+import org.chromium.content.browser.ContentViewCore;
+import org.chromium.content_public.browser.LoadUrlParams;
+import org.chromium.ui.base.PageTransition;
+
+/**
+ * Implements app-level keyboard shortcuts for ChromeTabbedActivity and DocumentActivity.
+ */
+public class KeyboardShortcuts {
+
+    private static final int CTRL = 1 << 31;
+    private static final int ALT = 1 << 30;
+    private static final int SHIFT = 1 << 29;
+
+    private KeyboardShortcuts() {}
+
+    private static int getMetaState(KeyEvent event) {
+        return (event.isCtrlPressed() ? CTRL : 0)
+                | (event.isAltPressed() ? ALT : 0)
+                | (event.isShiftPressed() ? SHIFT : 0);
+    }
+
+    /**
+     * This should be called from the Activity's dispatchKeyEvent() to handle keyboard shortcuts.
+     *
+     * Note: dispatchKeyEvent() is called before the active view or web page gets a chance to handle
+     * the key event. So the keys handled here cannot be overridden by any view or web page.
+     *
+     * @param event The KeyEvent to handle.
+     * @param activity The ChromeActivity in which the key was pressed.
+     * @param uiInitialized Whether the UI has been initialized. If this is false, most keys will
+     *                      not be handled.
+     * @return True if the event was handled. False if the event was ignored. Null if the event
+     *         should be handled by the activity's parent class.
+     */
+    @SuppressFBWarnings("NP_BOOLEAN_RETURN_NULL")
+    public static Boolean dispatchKeyEvent(KeyEvent event, ChromeActivity activity,
+            boolean uiInitialized) {
+        int keyCode = event.getKeyCode();
+        if (!uiInitialized) {
+            if (keyCode == KeyEvent.KEYCODE_SEARCH || keyCode == KeyEvent.KEYCODE_MENU) return true;
+            return null;
+        }
+
+        switch (keyCode) {
+            case KeyEvent.KEYCODE_SEARCH:
+                if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {
+                    activity.onMenuOrKeyboardAction(R.id.focus_url_bar, false);
+                }
+                // Always consume the SEARCH key events to prevent android from showing
+                // the default app search UI, which locks up Chrome.
+                return true;
+            case KeyEvent.KEYCODE_MENU:
+                if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {
+                    activity.onMenuOrKeyboardAction(R.id.show_menu, false);
+                }
+                return true;
+            case KeyEvent.KEYCODE_TV:
+            case KeyEvent.KEYCODE_GUIDE:
+            case KeyEvent.KEYCODE_DVR:
+            case KeyEvent.KEYCODE_AVR_INPUT:
+            case KeyEvent.KEYCODE_AVR_POWER:
+            case KeyEvent.KEYCODE_STB_INPUT:
+            case KeyEvent.KEYCODE_STB_POWER:
+            case KeyEvent.KEYCODE_TV_INPUT:
+            case KeyEvent.KEYCODE_TV_POWER:
+            case KeyEvent.KEYCODE_WINDOW:
+                // Do not consume the AV device-related keys so that the system will take
+                // an appropriate action, such as switching to TV mode.
+                return false;
+        }
+
+        return null;
+    }
+
+    /**
+     * This should be called from the Activity's onKeyDown() to handle keyboard shortcuts.
+     *
+     * Note: onKeyDown() is called after the active view or web page has had a chance to handle
+     * the key event. So the keys handled here *can* be overridden by any view or web page.
+     *
+     * @param event The KeyEvent to handle.
+     * @param activity The ChromeActivity in which the key was pressed.
+     * @param isCurrentTabVisible Whether page-related actions are valid, e.g. reload, zoom in.
+     *                            This should be false when in the tab switcher.
+     * @param tabSwitchingEnabled Whether shortcuts that switch between tabs are enabled (e.g.
+     *                            Ctrl+Tab, Ctrl+3).
+     * @return Whether the key event was handled.
+     */
+    public static boolean onKeyDown(KeyEvent event, ChromeActivity activity,
+            boolean isCurrentTabVisible, boolean tabSwitchingEnabled) {
+        int keyCode = event.getKeyCode();
+        if (event.getRepeatCount() != 0 || KeyEvent.isModifierKey(keyCode)) return false;
+        if (!event.isCtrlPressed() && !event.isAltPressed()
+                && keyCode != KeyEvent.KEYCODE_F3
+                && keyCode != KeyEvent.KEYCODE_F5) {
+            return false;
+        }
+
+        TabModel curModel = activity.getCurrentTabModel();
+        int count = curModel.getCount();
+
+        int metaState = getMetaState(event);
+        int keyCodeAndMeta = keyCode | metaState;
+
+        switch (keyCodeAndMeta) {
+            case CTRL | KeyEvent.KEYCODE_T:
+                activity.onMenuOrKeyboardAction(curModel.isIncognito()
+                        ? R.id.new_incognito_tab_menu_id
+                        : R.id.new_tab_menu_id, false);
+                return true;
+            case CTRL | KeyEvent.KEYCODE_N:
+                activity.onMenuOrKeyboardAction(R.id.new_tab_menu_id, false);
+                return true;
+            case CTRL | SHIFT | KeyEvent.KEYCODE_N:
+                activity.onMenuOrKeyboardAction(R.id.new_incognito_tab_menu_id, false);
+                return true;
+            case CTRL | SHIFT | KeyEvent.KEYCODE_B:
+            case CTRL | KeyEvent.KEYCODE_H:
+                String url = keyCode == KeyEvent.KEYCODE_B
+                        ? UrlConstants.BOOKMARKS_URL
+                        : UrlConstants.HISTORY_URL;
+                Tab currentTab = TabModelUtils.getCurrentTab(curModel);
+                if (currentTab != null && isCurrentTabVisible) {
+                    currentTab.loadUrl(new LoadUrlParams(url, PageTransition.AUTO_BOOKMARK));
+                } else {
+                    ChromeTabCreator tabCreator = activity.getCurrentTabCreator();
+                    if (tabCreator != null) {
+                        tabCreator.launchUrl(url, TabLaunchType.FROM_KEYBOARD);
+                    }
+                }
+                return true;
+            case ALT | KeyEvent.KEYCODE_F:
+                activity.onMenuOrKeyboardAction(R.id.show_menu, false);
+                return true;
+        }
+
+        if (isCurrentTabVisible) {
+            if (tabSwitchingEnabled && (metaState == CTRL || metaState == ALT)) {
+                int numCode = keyCode - KeyEvent.KEYCODE_0;
+                if (numCode > 0 && numCode <= Math.min(count, 8)) {
+                    // Ctrl+1 to Ctrl+8: select tab by index
+                    TabModelUtils.setIndex(curModel, numCode - 1);
+                    return true;
+                } else if (numCode == 9 && count != 0) {
+                    // Ctrl+9: select last tab
+                    TabModelUtils.setIndex(curModel, count - 1);
+                    return true;
+                }
+            }
+
+            switch (keyCodeAndMeta) {
+                case CTRL | KeyEvent.KEYCODE_TAB:
+                case CTRL | KeyEvent.KEYCODE_PAGE_DOWN:
+                    if (tabSwitchingEnabled && count > 1) {
+                        TabModelUtils.setIndex(curModel, (curModel.index() + 1) % count);
+                    }
+                    return true;
+                case CTRL | SHIFT | KeyEvent.KEYCODE_TAB:
+                case CTRL | KeyEvent.KEYCODE_PAGE_UP:
+                    if (tabSwitchingEnabled && count > 1) {
+                        TabModelUtils.setIndex(curModel, (curModel.index() + count - 1) % count);
+                    }
+                    return true;
+                case CTRL | KeyEvent.KEYCODE_W:
+                case CTRL | KeyEvent.KEYCODE_F4:
+                    TabModelUtils.closeCurrentTab(curModel);
+                    return true;
+                case CTRL | KeyEvent.KEYCODE_F:
+                case CTRL | KeyEvent.KEYCODE_G:
+                case CTRL | SHIFT | KeyEvent.KEYCODE_G:
+                case KeyEvent.KEYCODE_F3:
+                case SHIFT | KeyEvent.KEYCODE_F3:
+                    activity.onMenuOrKeyboardAction(R.id.find_in_page_id, false);
+                    return true;
+                case CTRL | KeyEvent.KEYCODE_L:
+                case ALT | KeyEvent.KEYCODE_D:
+                    activity.onMenuOrKeyboardAction(R.id.focus_url_bar, false);
+                    return true;
+                case KeyEvent.KEYCODE_BOOKMARK:
+                case CTRL | KeyEvent.KEYCODE_D:
+                    activity.onMenuOrKeyboardAction(R.id.bookmark_this_page_id, false);
+                    return true;
+                case CTRL | KeyEvent.KEYCODE_P:
+                    activity.onMenuOrKeyboardAction(R.id.print_id, false);
+                    return true;
+                case CTRL | KeyEvent.KEYCODE_PLUS:
+                case CTRL | KeyEvent.KEYCODE_EQUALS:
+                case CTRL | SHIFT | KeyEvent.KEYCODE_PLUS:
+                case CTRL | SHIFT | KeyEvent.KEYCODE_EQUALS:
+                case KeyEvent.KEYCODE_ZOOM_IN:
+                    ContentViewCore cvc = activity.getCurrentContentViewCore();
+                    if (cvc != null) cvc.zoomIn();
+                    return true;
+                case CTRL | KeyEvent.KEYCODE_MINUS:
+                case KeyEvent.KEYCODE_ZOOM_OUT:
+                    cvc = activity.getCurrentContentViewCore();
+                    if (cvc != null) cvc.zoomOut();
+                    return true;
+                case CTRL | KeyEvent.KEYCODE_0:
+                    cvc = activity.getCurrentContentViewCore();
+                    if (cvc != null) cvc.zoomReset();
+                    return true;
+                case CTRL | KeyEvent.KEYCODE_R:
+                case KeyEvent.KEYCODE_F5:
+                    Tab tab = activity.getActivityTab();
+                    if (tab != null) tab.reload();
+                    return true;
+                case ALT | KeyEvent.KEYCODE_DPAD_LEFT:
+                    tab = activity.getActivityTab();
+                    if (tab != null && tab.canGoBack()) tab.goBack();
+                    return true;
+                case ALT | KeyEvent.KEYCODE_DPAD_RIGHT:
+                    tab = activity.getActivityTab();
+                    if (tab != null && tab.canGoForward()) tab.goForward();
+                    return true;
+                case CTRL | SHIFT | KeyEvent.KEYCODE_SLASH:  // i.e. Ctrl+?
+                    activity.onMenuOrKeyboardAction(R.id.help_id, false);
+                    return true;
+            }
+        }
+
+        return false;
+    }
+}