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Unified Diff: chrome/android/java_staging/src/org/chromium/chrome/browser/compositor/overlays/strip/StripLayoutHelper.java

Issue 1206673003: Merge java_staging/src into java/src. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: rebase Created 5 years, 6 months ago
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Index: chrome/android/java_staging/src/org/chromium/chrome/browser/compositor/overlays/strip/StripLayoutHelper.java
diff --git a/chrome/android/java_staging/src/org/chromium/chrome/browser/compositor/overlays/strip/StripLayoutHelper.java b/chrome/android/java_staging/src/org/chromium/chrome/browser/compositor/overlays/strip/StripLayoutHelper.java
deleted file mode 100644
index 6b9d640818f3b5d00cdf8985f58e3bfecefbf1ee..0000000000000000000000000000000000000000
--- a/chrome/android/java_staging/src/org/chromium/chrome/browser/compositor/overlays/strip/StripLayoutHelper.java
+++ /dev/null
@@ -1,1562 +0,0 @@
-// 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.compositor.overlays.strip;
-
-import static org.chromium.chrome.browser.compositor.layouts.ChromeAnimation.AnimatableAnimation.createAnimation;
-
-import android.content.Context;
-import android.content.res.Resources;
-import android.os.Handler;
-import android.os.Message;
-import android.os.SystemClock;
-import android.view.View;
-import android.view.ViewGroup.MarginLayoutParams;
-import android.widget.AdapterView;
-import android.widget.AdapterView.OnItemClickListener;
-import android.widget.ArrayAdapter;
-import android.widget.ListPopupWindow;
-
-import org.chromium.base.PerfTraceEvent;
-import org.chromium.base.VisibleForTesting;
-import org.chromium.base.annotations.SuppressFBWarnings;
-import org.chromium.chrome.R;
-import org.chromium.chrome.browser.Tab;
-import org.chromium.chrome.browser.compositor.layouts.ChromeAnimation;
-import org.chromium.chrome.browser.compositor.layouts.ChromeAnimation.Animatable;
-import org.chromium.chrome.browser.compositor.layouts.ChromeAnimation.Animation;
-import org.chromium.chrome.browser.compositor.layouts.LayoutRenderHost;
-import org.chromium.chrome.browser.compositor.layouts.LayoutUpdateHost;
-import org.chromium.chrome.browser.compositor.layouts.components.CompositorButton;
-import org.chromium.chrome.browser.compositor.layouts.components.VirtualView;
-import org.chromium.chrome.browser.compositor.layouts.content.TabContentManager;
-import org.chromium.chrome.browser.compositor.layouts.phone.stack.StackScroller;
-import org.chromium.chrome.browser.compositor.overlays.strip.TabLoadTracker.TabLoadTrackerCallback;
-import org.chromium.chrome.browser.tabmodel.TabCreatorManager.TabCreator;
-import org.chromium.chrome.browser.tabmodel.TabModel;
-import org.chromium.chrome.browser.tabmodel.TabModelUtils;
-import org.chromium.chrome.browser.util.MathUtils;
-import org.chromium.ui.base.LocalizationUtils;
-
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * This class handles managing the positions and behavior of all tabs in a tab strip. It is
- * responsible for both responding to UI input events and model change notifications, adjusting and
- * animating the tab strip as required.
- *
- * <p>
- * The stacking and visual behavior is driven by setting a {@link StripStacker}.
- */
-public class StripLayoutHelper {
- // Drag Constants
- private static final int REORDER_SCROLL_NONE = 0;
- private static final int REORDER_SCROLL_LEFT = 1;
- private static final int REORDER_SCROLL_RIGHT = 2;
-
- // Behavior Constants
- private static final float EPSILON = 0.001f;
- private static final int MAX_TABS_TO_STACK = 4;
- private static final float TAN_OF_REORDER_ANGLE_START_THRESHOLD =
- (float) Math.tan(Math.PI / 4.0f);
- private static final float REORDER_OVERLAP_SWITCH_PERCENTAGE = 0.53f;
-
- // Animation/Timer Constants
- private static final int RESIZE_DELAY_MS = 1500;
- private static final int SPINNER_UPDATE_DELAY_MS = 66;
- // Degrees per milisecond.
- private static final int EXPAND_DURATION_MS = 250;
- private static final int ANIM_TAB_CREATED_MS = 150;
- private static final int ANIM_TAB_CLOSED_MS = 150;
- private static final int ANIM_TAB_RESIZE_MS = 150;
- private static final int ANIM_TAB_MOVE_MS = 125;
-
- // Visibility Constants
- private static final float TAB_STACK_WIDTH_DP = 4.f;
- private static final float TAB_OVERLAP_WIDTH_DP = 24.f;
- private static final float MIN_TAB_WIDTH_DP = 190.f;
- private static final float MAX_TAB_WIDTH_DP = 265.f;
- private static final float REORDER_MOVE_START_THRESHOLD_DP = 50.f;
- private static final float REORDER_EDGE_SCROLL_MAX_SPEED_DP = 1000.f;
- private static final float REORDER_EDGE_SCROLL_START_MIN_DP = 87.4f;
- private static final float REORDER_EDGE_SCROLL_START_MAX_DP = 18.4f;
- private static final float NEW_TAB_BUTTON_Y_OFFSET_DP = 6.f;
- private static final float NEW_TAB_BUTTON_CLICK_SLOP_DP = 4.f;
- private static final float NEW_TAB_BUTTON_WIDTH_DP = 58.f;
- private static final float NEW_TAB_BUTTON_HEIGHT_DP = 32.5f;
-
- private static final int MESSAGE_RESIZE = 1;
- private static final int MESSAGE_UPDATE_SPINNER = 2;
-
- // External influences
- private final LayoutUpdateHost mUpdateHost;
- private final LayoutRenderHost mRenderHost;
- private TabModel mModel;
- private TabCreator mTabCreator;
- private TabContentManager mTabContentManager;
- private StripStacker mStripStacker = new StaticStripStacker();
-
- // Internal State
- private StripLayoutTab[] mStripTabs = new StripLayoutTab[0];
- private StripLayoutTab[] mStripTabsVisuallyOrdered = new StripLayoutTab[0];
- private StripLayoutTab[] mStripTabsToRender = new StripLayoutTab[0];
- private final StripTabEventHandler mStripTabEventHandler = new StripTabEventHandler();
- private final TabLoadTrackerCallback mTabLoadTrackerHost = new TabLoadTrackerCallbackImpl();
- private ChromeAnimation<Animatable<?>> mLayoutAnimations;
-
- private final CompositorButton mNewTabButton;
-
- // Layout Constants
- private final float mTabStackWidth;
- private final float mTabOverlapWidth;
- private float mNewTabButtonWidth;
- private final float mMinTabWidth;
- private final float mMaxTabWidth;
- private final float mReorderMoveStartThreshold;
- private final ListPopupWindow mTabMenu;
-
- // Strip State
- private StackScroller mScroller;
- private int mScrollOffset;
- private float mMinScrollOffset;
- private float mCachedTabWidth;
-
- // Reorder State
- private int mReorderState = REORDER_SCROLL_NONE;
- private boolean mInReorderMode = false;
- private float mLastReorderX;
- private long mLastReorderScrollTime;
-
- // UI State
- private StripLayoutTab mInteractingTab;
- private CompositorButton mLastPressedCloseButton;
- private float mWidth;
- private float mHeight;
- private float mLeftMargin;
- private float mRightMargin;
- private final boolean mIncognito;
-
- // Tab menu item IDs
- public static final int ID_CLOSE_ALL_TABS = 0;
-
- private Context mContext;
- /**
- * Creates an instance of the {@link StripLayoutHelper}.
- * @param context The current Android {@link Context}.
- * @param updateHost The parent {@link LayoutUpdateHost}.
- * @param renderHost The {@link LayoutRenderHost}.
- * @param incognito Whether or not this tab strip is incognito.
- */
- public StripLayoutHelper(Context context, LayoutUpdateHost updateHost,
- LayoutRenderHost renderHost, boolean incognito) {
- mTabStackWidth = TAB_STACK_WIDTH_DP;
- mTabOverlapWidth = TAB_OVERLAP_WIDTH_DP;
- mNewTabButtonWidth = NEW_TAB_BUTTON_WIDTH_DP;
-
- if (LocalizationUtils.isLayoutRtl()) {
- // In rtl let the tab nest closer to the new tab button.
- mNewTabButtonWidth -= mTabOverlapWidth / 2;
- }
- mRightMargin = LocalizationUtils.isLayoutRtl() ? 0 : mNewTabButtonWidth;
- mLeftMargin = LocalizationUtils.isLayoutRtl() ? mNewTabButtonWidth : 0;
- mMinTabWidth = MIN_TAB_WIDTH_DP;
- mMaxTabWidth = MAX_TAB_WIDTH_DP;
- mReorderMoveStartThreshold = REORDER_MOVE_START_THRESHOLD_DP;
- mUpdateHost = updateHost;
- mRenderHost = renderHost;
- mNewTabButton =
- new CompositorButton(context, NEW_TAB_BUTTON_WIDTH_DP, NEW_TAB_BUTTON_HEIGHT_DP);
- mNewTabButton.setResources(R.drawable.btn_tabstrip_new_tab_normal,
- R.drawable.btn_tabstrip_new_tab_pressed,
- R.drawable.btn_tabstrip_new_incognito_tab_normal,
- R.drawable.btn_tabstrip_new_incognito_tab_pressed);
- mNewTabButton.setIncognito(incognito);
- mNewTabButton.setY(NEW_TAB_BUTTON_Y_OFFSET_DP);
- mNewTabButton.setClickSlop(NEW_TAB_BUTTON_CLICK_SLOP_DP);
- Resources res = context.getResources();
- mNewTabButton.setAccessibilityDescription(
- res.getString(R.string.accessibility_toolbar_btn_new_tab),
- res.getString(R.string.accessibility_toolbar_btn_new_incognito_tab));
- mContext = context;
- mIncognito = incognito;
-
- // Create tab menu
- mTabMenu = new ListPopupWindow(mContext);
- mTabMenu.setAdapter(new ArrayAdapter<String>(mContext, R.layout.eb_popup_item,
- new String[] {
- mContext.getString(!mIncognito ? R.string.menu_close_all_tabs
- : R.string.menu_close_all_incognito_tabs)}));
- mTabMenu.setOnItemClickListener(new OnItemClickListener() {
- @Override
- public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
- mTabMenu.dismiss();
- if (position == ID_CLOSE_ALL_TABS) {
- mModel.closeAllTabs(false, false);
- }
- }
- });
-
- int menuWidth = mContext.getResources().getDimensionPixelSize(R.dimen.menu_width);
- mTabMenu.setWidth(menuWidth);
- mTabMenu.setModal(true);
- }
-
- /**
- * Get a list of virtual views for accessibility.
- *
- * @param views A List to populate with virtual views.
- */
- public void getVirtualViews(List<VirtualView> views) {
- for (int i = mStripTabsToRender.length - 1; i >= 0; i--) {
- StripLayoutTab tab = mStripTabsToRender[i];
- tab.getVirtualViews(views);
- }
- if (mNewTabButton.isVisible()) views.add(mNewTabButton);
- }
-
- /**
- * @return The visually ordered list of visible {@link StripLayoutTab}s.
- */
- @SuppressFBWarnings("EI_EXPOSE_REP")
- public StripLayoutTab[] getStripLayoutTabsToRender() {
- return mStripTabsToRender;
- }
-
- @VisibleForTesting
- public int getTabCount() {
- return mStripTabs.length;
- }
-
- /**
- * @return A {@link CompositorButton} that represents the positioning of the new tab button.
- */
- public CompositorButton getNewTabButton() {
- return mNewTabButton;
- }
-
- /**
- * @return The brightness of background tabs in the tabstrip.
- */
- public float getStripBrightness() {
- return mInReorderMode ? 0.75f : 1.0f;
- }
-
- /**
- * Allows changing the visual behavior of the tabs in this stack, as specified by
- * {@code stacker}.
- * @param stacker The {@link StripStacker} that should specify how the tabs should be
- * presented.
- */
- public void setTabStacker(StripStacker stacker) {
- if (stacker != mStripStacker) mUpdateHost.requestUpdate();
- mStripStacker = stacker;
-
- // Push Stacker properties to tabs.
- for (int i = 0; i < mStripTabs.length; i++) {
- pushStackerPropertiesToTab(mStripTabs[i]);
- }
- }
-
- /**
- * @parm margin The width of the distance between the left edge of
- * the screen and first tab.
- */
- public void setLeftMargin(float margin) {
- mLeftMargin = margin;
- mLeftMargin += LocalizationUtils.isLayoutRtl() ? mNewTabButtonWidth : 0;
- }
-
- /**
- * @param margin The distance between the rightmost tab and the edge of the
- * screen.
- */
- public void setRightMargin(float margin) {
- mRightMargin = margin;
- mRightMargin += LocalizationUtils.isLayoutRtl() ? 0 : mNewTabButtonWidth;
- }
-
- /**
- * Updates the size of the virtual tab strip, making the tabs resize and move accordingly.
- * @param width The new available width.
- * @param height The new height this stack should be.
- */
- public void onSizeChanged(float width, float height) {
- if (mWidth == width && mHeight == height) return;
-
- boolean widthChanged = mWidth != width;
-
- mWidth = width;
- mHeight = height;
-
- for (int i = 0; i < mStripTabs.length; i++) {
- mStripTabs[i].setHeight(mHeight);
- }
-
- if (widthChanged) computeAndUpdateTabWidth(false);
- if (mStripTabs.length > 0) mUpdateHost.requestUpdate();
-
- // Dismiss tab menu, similar to how the app menu is dismissed on orientation change
- mTabMenu.dismiss();
- }
-
- /**
- * Updates all internal resources and dimensions.
- * @param context The current Android {@link Context}.
- */
- public void onContextChanged(Context context) {
- mScroller = new StackScroller(context);
- mContext = context;
- }
-
- /**
- * Notify the a title has changed.
- *
- * @param tabId The id of the tab that has changed.
- * @param title The new title.
- */
- public void tabTitleChanged(int tabId, String title) {
- StripLayoutTab tab = findTabById(tabId);
- if (tab != null) tab.setAccessibilityDescription(title);
- }
-
- /**
- * Sets the {@link TabModel} that this {@link StripLayoutHelper} will visually represent.
- * @param model The {@link TabModel} to visually represent.
- */
- public void setTabModel(TabModel model, TabContentManager manager, TabCreator tabCreator) {
- if (mModel == model) return;
- mModel = model;
- mTabContentManager = manager;
- mTabCreator = tabCreator;
- computeAndUpdateTabOrders(false);
- }
-
- /**
- * Helper-specific updates. Cascades the values updated by the animations and flings.
- * @param time The current time of the app in ms.
- * @param dt The delta time between update frames in ms.
- * @return Whether or not animations are done.
- */
- public boolean updateLayout(long time, long dt) {
- PerfTraceEvent.instant("StripLayoutHelper:updateLayout");
- final boolean doneAnimating = onUpdateAnimation(time, false);
- updateStrip(time, dt);
- return doneAnimating;
- }
-
- /**
- * Called when a tab get selected.
- * @param time The current time of the app in ms.
- * @param id The id of the selected tab.
- * @param prevId The id of the previously selected tab.
- */
- public void tabSelected(long time, int id, int prevId) {
- if (findTabById(id) == null) {
- tabCreated(time, id, prevId, true);
- } else {
- updateVisualTabOrdering();
- mUpdateHost.requestUpdate();
- }
- }
-
- /**
- * Called when a tab has been moved in the tabModel.
- * @param time The current time of the app in ms.
- * @param id The id of the Tab.
- * @param oldIndex The old index of the tab in the {@link TabModel}.
- * @param newIndex The new index of the tab in the {@link TabModel}.
- */
- public void tabMoved(long time, int id, int oldIndex, int newIndex) {
- reorderTab(id, oldIndex, newIndex, false);
-
- updateVisualTabOrdering();
- mUpdateHost.requestUpdate();
- }
-
- /**
- * Called when a tab is being closed. When called, the closing tab will not
- * be part of the model.
- * @param time The current time of the app in ms.
- * @param id The id of the tab being closed.
- */
- public void tabClosed(long time, int id) {
- if (findTabById(id) == null) return;
-
- // 1. Find out if we're closing the last tab. This determines if we resize immediately.
- // We know mStripTabs.length >= 1 because findTabById did not return null.
- boolean closingLastTab = mStripTabs[mStripTabs.length - 1].getId() == id;
-
- // 2. Rebuild the strip.
- computeAndUpdateTabOrders(!closingLastTab);
-
- mUpdateHost.requestUpdate();
- }
-
- /**
- * Called when a tab close has been undone and the tab has been restored.
- * @param time The current time of the app in ms.
- * @param id The id of the Tab.
- */
- public void tabClosureCancelled(long time, int id) {
- final boolean selected = TabModelUtils.getCurrentTabId(mModel) == id;
- tabCreated(time, id, Tab.INVALID_TAB_ID, selected);
- }
-
- /**
- * Called when a tab is created from the top left button.
- * @param time The current time of the app in ms.
- * @param id The id of the newly created tab.
- * @param prevId The id of the source tab.
- * @param selected Whether the tab will be selected.
- */
- public void tabCreated(long time, int id, int prevId, boolean selected) {
- if (findTabById(id) != null) return;
-
- // 1. Build any tabs that are missing.
- computeAndUpdateTabOrders(false);
-
- // 2. Start an animation for the newly created tab.
- StripLayoutTab tab = findTabById(id);
- if (tab != null) startAnimation(buildTabCreatedAnimation(tab), true);
-
- // 3. Figure out which tab needs to be visible.
- StripLayoutTab fastExpandTab = findTabById(prevId);
- boolean allowLeftExpand = false;
- if (!selected) {
- fastExpandTab = tab;
- allowLeftExpand = true;
- }
-
- // 4. Scroll the stack so that the fast expand tab is visible.
- if (fastExpandTab != null) {
- float delta =
- calculateOffsetToMakeTabVisible(fastExpandTab, false, allowLeftExpand, true);
- if (delta != 0.f) {
- mScroller.startScroll(mScrollOffset, 0, (int) delta, 0, time, EXPAND_DURATION_MS);
- }
- }
-
- mUpdateHost.requestUpdate();
- }
-
- /**
- * Called when a tab has started loading.
- * @param id The id of the Tab.
- */
- public void tabPageLoadStarted(int id) {
- StripLayoutTab tab = findTabById(id);
- if (tab != null) tab.pageLoadingStarted();
- }
-
- /**
- * Called when a tab has finished loading.
- * @param id The id of the Tab.
- */
- public void tabPageLoadFinished(int id) {
- StripLayoutTab tab = findTabById(id);
- if (tab != null) tab.pageLoadingFinished();
- }
-
- /**
- * Called when a tab has started loading resources.
- * @param id The id of the Tab.
- */
- public void tabLoadStarted(int id) {
- StripLayoutTab tab = findTabById(id);
- if (tab != null) tab.loadingStarted();
- }
-
- /**
- * Called when a tab has stopped loading resources.
- * @param id The id of the Tab.
- */
- public void tabLoadFinished(int id) {
- StripLayoutTab tab = findTabById(id);
- if (tab != null) tab.loadingFinished();
- }
-
- /**
- * Called on touch drag event.
- * @param time The current time of the app in ms.
- * @param x The y coordinate of the end of the drag event.
- * @param y The y coordinate of the end of the drag event.
- * @param deltaX The number of pixels dragged in the x direction.
- * @param deltaY The number of pixels dragged in the y direction.
- * @param totalX The total delta x since the drag started.
- * @param totalY The total delta y since the drag started.
- */
- public void drag(
- long time, float x, float y, float deltaX, float deltaY, float totalX, float totalY) {
- resetResizeTimeout(false);
-
- deltaX = MathUtils.flipSignIf(deltaX, LocalizationUtils.isLayoutRtl());
-
- // 1. Reset the button state.
- mNewTabButton.drag(x, y);
- if (mLastPressedCloseButton != null) {
- if (!mLastPressedCloseButton.drag(x, y)) mLastPressedCloseButton = null;
- }
-
- if (mInReorderMode) {
- // 2.a. Handle reordering tabs.
- // This isn't the accumulated delta since the beginning of the drag. It accumulates
- // the delta X until a threshold is crossed and then the event gets processed.
- float accumulatedDeltaX = x - mLastReorderX;
-
- if (Math.abs(accumulatedDeltaX) >= 1.f) {
- if (!LocalizationUtils.isLayoutRtl()) {
- if (deltaX >= 1.f) {
- mReorderState |= REORDER_SCROLL_RIGHT;
- } else if (deltaX <= -1.f) {
- mReorderState |= REORDER_SCROLL_LEFT;
- }
- } else {
- if (deltaX >= 1.f) {
- mReorderState |= REORDER_SCROLL_LEFT;
- } else if (deltaX <= -1.f) {
- mReorderState |= REORDER_SCROLL_RIGHT;
- }
- }
-
- mLastReorderX = x;
- updateReorderPosition(accumulatedDeltaX);
- }
- } else if (!mScroller.isFinished()) {
- // 2.b. Still scrolling, update the scroll destination here.
- mScroller.setFinalX((int) (mScroller.getFinalX() + deltaX));
- } else {
- // 2.c. Not scrolling. Check if we need to fast expand.
- float fastExpandDelta =
- calculateOffsetToMakeTabVisible(mInteractingTab, true, true, true);
-
- if (mInteractingTab != null && fastExpandDelta != 0.f) {
- if ((fastExpandDelta > 0 && deltaX > 0) || (fastExpandDelta < 0 && deltaX < 0)) {
- mScroller.startScroll(
- mScrollOffset, 0, (int) fastExpandDelta, 0, time, EXPAND_DURATION_MS);
- }
- } else {
- updateScrollOffsetPosition((int) (mScrollOffset + deltaX));
- }
- }
-
- // 3. Check if we should start the reorder mode
- if (!mInReorderMode) {
- final float absTotalX = Math.abs(totalX);
- final float absTotalY = Math.abs(totalY);
- if (totalY > mReorderMoveStartThreshold && absTotalX < mReorderMoveStartThreshold * 2.f
- && (absTotalX > EPSILON
- && (absTotalY / absTotalX) > TAN_OF_REORDER_ANGLE_START_THRESHOLD)) {
- startReorderMode(time, x, x - totalX);
- }
- }
-
- // If we're scrolling at all we aren't interacting with any particular tab.
- // We already kicked off a fast expansion earlier if we needed one. Reorder mode will
- // repopulate this if necessary.
- if (!mInReorderMode) mInteractingTab = null;
- mUpdateHost.requestUpdate();
- }
-
- /**
- * Called on touch fling event. This is called before the onUpOrCancel event.
- * @param time The current time of the app in ms.
- * @param x The y coordinate of the start of the fling event.
- * @param y The y coordinate of the start of the fling event.
- * @param velocityX The amount of velocity in the x direction.
- * @param velocityY The amount of velocity in the y direction.
- */
- public void fling(long time, float x, float y, float velocityX, float velocityY) {
- resetResizeTimeout(false);
-
- velocityX = MathUtils.flipSignIf(velocityX, LocalizationUtils.isLayoutRtl());
-
- // 1. If we're currently in reorder mode, don't allow the user to fling.
- if (mInReorderMode) return;
-
- // 2. If we're fast expanding or scrolling, figure out the destination of the scroll so we
- // can apply it to the end of this fling.
- int scrollDeltaRemaining = 0;
- if (!mScroller.isFinished()) {
- scrollDeltaRemaining = mScroller.getFinalX() - mScrollOffset;
-
- mInteractingTab = null;
- mScroller.forceFinished(true);
- }
-
- // 3. Kick off the fling.
- mScroller.fling(
- mScrollOffset, 0, (int) velocityX, 0, (int) mMinScrollOffset, 0, 0, 0, 0, 0, time);
- mScroller.setFinalX(mScroller.getFinalX() + scrollDeltaRemaining);
- mUpdateHost.requestUpdate();
- }
-
- /**
- * Called on onDown event.
- * @param time The time stamp in millisecond of the event.
- * @param x The x position of the event.
- * @param y The y position of the event.
- */
- public void onDown(long time, float x, float y) {
- resetResizeTimeout(false);
-
- if (mNewTabButton.onDown(x, y)) {
- mRenderHost.requestRender();
- return;
- }
-
- final StripLayoutTab clickedTab = getTabAtPosition(x);
- final int index = clickedTab != null
- ? TabModelUtils.getTabIndexById(mModel, clickedTab.getId())
- : TabModel.INVALID_TAB_INDEX;
- // http://crbug.com/472186 : Needs to handle a case that index is invalid.
- // The case could happen when the current tab is touched while we're inflating the rest of
- // the tabs from disk.
- mInteractingTab = index != TabModel.INVALID_TAB_INDEX && index < mStripTabs.length
- ? mStripTabs[index]
- : null;
- if (clickedTab != null && clickedTab.checkCloseHitTest(x, y)) {
- clickedTab.setClosePressed(true);
- mLastPressedCloseButton = clickedTab.getCloseButton();
- mRenderHost.requestRender();
- }
-
- if (!mScroller.isFinished()) {
- mScroller.forceFinished(true);
- mInteractingTab = null;
- }
- }
-
- /**
- * Called on long press touch event.
- * @param time The current time of the app in ms.
- * @param x The x coordinate of the position of the press event.
- * @param y The y coordinate of the position of the press event.
- */
- public void onLongPress(long time, float x, float y) {
- final StripLayoutTab clickedTab = getTabAtPosition(x);
- if (clickedTab != null && clickedTab.checkCloseHitTest(x, y)) {
- clickedTab.setClosePressed(false);
- mRenderHost.requestRender();
- showTabMenu(clickedTab);
- } else {
- resetResizeTimeout(false);
- startReorderMode(time, x, x);
- }
- }
-
- /**
- * Called on click. This is called before the onUpOrCancel event.
- * @param time The current time of the app in ms.
- * @param x The x coordinate of the position of the click.
- * @param y The y coordinate of the position of the click.
- */
- public void click(long time, float x, float y) {
- resetResizeTimeout(false);
-
- if (mNewTabButton.click(x, y) && mModel != null) {
- mTabCreator.launchNTP();
- return;
- }
-
- final StripLayoutTab clickedTab = getTabAtPosition(x);
- if (clickedTab == null || clickedTab.isDying()) return;
- if (clickedTab.checkCloseHitTest(x, y)) {
- // 1. Start the close animation.
- startAnimation(buildTabClosedAnimation(clickedTab), true);
-
- // 2. Set the dying state of the tab.
- clickedTab.setIsDying(true);
-
- // 3. Fake a selection on the next tab now.
- Tab nextTab = mModel.getNextTabIfClosed(clickedTab.getId());
- if (nextTab != null) tabSelected(time, nextTab.getId(), clickedTab.getId());
-
- // 4. Find out if we're closing the last tab. This determines if we resize immediately.
- boolean lastTab = mStripTabs.length == 0
- || mStripTabs[mStripTabs.length - 1].getId() == clickedTab.getId();
-
- // 5. Resize the tabs appropriately.
- resizeTabStrip(!lastTab);
- } else {
- int newIndex = TabModelUtils.getTabIndexById(mModel, clickedTab.getId());
- TabModelUtils.setIndex(mModel, newIndex);
- }
- }
-
- /**
- * Called on up or cancel touch events. This is called after the click and fling event if any.
- * @param time The current time of the app in ms.
- */
- public void onUpOrCancel(long time) {
- // 1. Reset the last close button pressed state.
- if (mLastPressedCloseButton != null) mLastPressedCloseButton.onUpOrCancel();
- mLastPressedCloseButton = null;
-
- // 2. Stop any reordering that is happening.
- stopReorderMode();
-
- // 3. Reset state
- mInteractingTab = null;
- mReorderState = REORDER_SCROLL_NONE;
- if (mNewTabButton.onUpOrCancel() && mModel != null) {
- mTabCreator.launchNTP();
- }
- }
-
- private boolean onUpdateAnimation(long time, boolean jumpToEnd) {
- // 1. Handle any Scroller movements (flings).
- if (!jumpToEnd) updateScrollOffset(time);
-
- // 2. Handle reordering automatically scrolling the tab strip.
- handleReorderAutoScrolling(time);
-
- // 3. Handle layout-wide animations.
- boolean update = false;
- boolean finished = true;
- if (mLayoutAnimations != null) {
- if (jumpToEnd) {
- finished = mLayoutAnimations.finished();
- } else {
- finished = mLayoutAnimations.update(time);
- }
- if (jumpToEnd || finished) finishAnimation();
-
- update = true;
- }
-
- // 4. Handle tab-specific content animations.
- for (int i = 0; i < mStripTabs.length; i++) {
- StripLayoutTab tab = mStripTabs[i];
- if (tab.isAnimating()) {
- update = true;
- finished &= tab.onUpdateAnimation(time, jumpToEnd);
- }
- }
-
- // 5. Update tab spinners.
- updateSpinners();
-
- // 6. Stop any flings if we're trying to stop animations.
- if (jumpToEnd) mScroller.forceFinished(true);
-
- // 7. Request another update if anything requires it.
- if (update) mUpdateHost.requestUpdate();
-
- return finished;
- }
-
- /**
- * @return Whether or not the tabs are moving.
- */
- @VisibleForTesting
- public boolean isAnimating() {
- return mLayoutAnimations != null || !mScroller.isFinished();
- }
-
- /**
- * Finishes any outstanding animations and propagates any related changes to the
- * {@link TabModel}.
- */
- public void finishAnimation() {
- if (mLayoutAnimations == null) return;
-
- // 1. Force any outstanding animations to finish.
- mLayoutAnimations.updateAndFinish();
- mLayoutAnimations = null;
-
- // 2. Figure out which tabs need to be closed.
- ArrayList<StripLayoutTab> tabsToRemove = new ArrayList<StripLayoutTab>();
- for (int i = 0; i < mStripTabs.length; i++) {
- StripLayoutTab tab = mStripTabs[i];
- if (tab.isDying()) tabsToRemove.add(tab);
- }
-
- // 3. Pass the close notifications to the model.
- for (StripLayoutTab tab : tabsToRemove) {
- TabModelUtils.closeTabById(mModel, tab.getId(), true);
- }
-
- if (!tabsToRemove.isEmpty()) mUpdateHost.requestUpdate();
- }
-
- private void startAnimation(Animation<Animatable<?>> animation, boolean finishPrevious) {
- if (finishPrevious) finishAnimation();
-
- if (mLayoutAnimations == null) {
- mLayoutAnimations = new ChromeAnimation<ChromeAnimation.Animatable<?>>();
- }
-
- mLayoutAnimations.add(animation);
-
- mUpdateHost.requestUpdate();
- }
-
- private void cancelAnimation(StripLayoutTab tab, StripLayoutTab.Property property) {
- if (mLayoutAnimations == null) return;
- mLayoutAnimations.cancel(tab, property);
- }
-
- private void updateSpinners() {
- boolean tabsToLoad = false;
- for (int i = 0; i < mStripTabs.length; i++) {
- StripLayoutTab tab = mStripTabs[i];
- // TODO(clholgat): Only update if the tab is visible.
- if (tab.isLoading()) {
- tabsToLoad = true;
- }
- }
- if (tabsToLoad) {
- mStripTabEventHandler.removeMessages(MESSAGE_UPDATE_SPINNER);
- mStripTabEventHandler.sendEmptyMessageDelayed(
- MESSAGE_UPDATE_SPINNER, SPINNER_UPDATE_DELAY_MS);
- }
- }
-
- private void updateScrollOffsetPosition(int pos) {
- int oldScrollOffset = mScrollOffset;
- mScrollOffset = MathUtils.clamp(pos, (int) mMinScrollOffset, 0);
-
- if (mInReorderMode && mScroller.isFinished()) {
- int delta = MathUtils.flipSignIf(
- oldScrollOffset - mScrollOffset, LocalizationUtils.isLayoutRtl());
- updateReorderPosition(delta);
- }
- }
-
- private void updateScrollOffset(long time) {
- if (mScroller.computeScrollOffset(time)) {
- updateScrollOffsetPosition(mScroller.getCurrX());
- mUpdateHost.requestUpdate();
- }
- }
-
- private void updateScrollOffsetLimits() {
- // 1. Compute the width of the available space for all tabs.
- float stripWidth = mWidth - mLeftMargin - mRightMargin;
-
- // 2. Compute the effective width of every tab.
- float tabsWidth = 0.f;
- for (int i = 0; i < mStripTabs.length; i++) {
- final StripLayoutTab tab = mStripTabs[i];
- tabsWidth += (tab.getWidth() - mTabOverlapWidth) * tab.getWidthWeight();
- }
-
- // 3. Correct fencepost error in tabswidth;
- tabsWidth = tabsWidth + mTabOverlapWidth;
-
- // 4. Calculate the minimum scroll offset. Round > -EPSILON to 0.
- mMinScrollOffset = Math.min(0.f, stripWidth - tabsWidth);
- if (mMinScrollOffset > -EPSILON) mMinScrollOffset = 0.f;
-
- // 5. Clamp mScrollOffset to make sure it's in the valid range.
- updateScrollOffsetPosition(mScrollOffset);
- }
-
- private void computeAndUpdateTabOrders(boolean delayResize) {
- final int count = mModel.getCount();
- StripLayoutTab[] tabs = new StripLayoutTab[count];
-
- for (int i = 0; i < count; i++) {
- int id = mModel.getTabAt(i).getId();
- StripLayoutTab oldTab = findTabById(id);
- tabs[i] = oldTab != null ? oldTab : createStripTab(id);
- tabs[i].setAccessibilityDescription(mModel.getTabAt(i).getTitle());
- }
-
- int oldStripLength = mStripTabs.length;
- mStripTabs = tabs;
-
- if (mStripTabs.length != oldStripLength) resizeTabStrip(delayResize);
-
- updateVisualTabOrdering();
- }
-
- private void resizeTabStrip(boolean delay) {
- if (delay) {
- resetResizeTimeout(true);
- } else {
- computeAndUpdateTabWidth(true);
- }
- }
-
- private void updateVisualTabOrdering() {
- if (mStripTabs.length != mStripTabsVisuallyOrdered.length) {
- mStripTabsVisuallyOrdered = new StripLayoutTab[mStripTabs.length];
- }
-
- mStripStacker.createVisualOrdering(mModel.index(), mStripTabs, mStripTabsVisuallyOrdered);
- }
-
- private StripLayoutTab createStripTab(int id) {
- // TODO: Cache these
- StripLayoutTab tab =
- new StripLayoutTab(mContext, id, mTabLoadTrackerHost, mRenderHost, mIncognito);
- tab.setHeight(mHeight);
- pushStackerPropertiesToTab(tab);
- return tab;
- }
-
- private void pushStackerPropertiesToTab(StripLayoutTab tab) {
- tab.setCanShowCloseButton(mStripStacker.canShowCloseButton());
- // TODO(dtrainor): Push more properties as they are added (title text slide, etc?)
- }
-
- /**
- * @param id The Tab id.
- * @return The StripLayoutTab that corresponds to that tabid.
- */
- @VisibleForTesting
- public StripLayoutTab findTabById(int id) {
- if (mStripTabs == null) return null;
- for (int i = 0; i < mStripTabs.length; i++) {
- if (mStripTabs[i].getId() == id) return mStripTabs[i];
- }
- return null;
- }
-
- private int findIndexForTab(int id) {
- if (mStripTabs == null) return TabModel.INVALID_TAB_INDEX;
- for (int i = 0; i < mStripTabs.length; i++) {
- if (mStripTabs[i].getId() == id) return i;
- }
- return TabModel.INVALID_TAB_INDEX;
- }
-
- private void computeAndUpdateTabWidth(boolean animate) {
- // Remove any queued resize messages.
- mStripTabEventHandler.removeMessages(MESSAGE_RESIZE);
-
- int numTabs = Math.max(mStripTabs.length, 1);
-
- // 1. Compute the width of the available space for all tabs.
- float stripWidth = mWidth - mLeftMargin - mRightMargin;
-
- // 2. Compute additional width we gain from overlapping the tabs.
- float overlapWidth = mTabOverlapWidth * (numTabs - 1);
-
- // 3. Calculate the optimal tab width.
- float optimalTabWidth = (stripWidth + overlapWidth) / numTabs;
-
- // 4. Calculate the realistic tab width.
- mCachedTabWidth = MathUtils.clamp(optimalTabWidth, mMinTabWidth, mMaxTabWidth);
-
- // 5. Propagate the tab width to all tabs.
- for (int i = 0; i < mStripTabs.length; i++) {
- StripLayoutTab tab = mStripTabs[i];
- if (tab.isDying()) continue;
-
- // 5.a. Cancel any outstanding tab width animations.
- cancelAnimation(mStripTabs[i], StripLayoutTab.Property.WIDTH);
-
- if (animate) {
- startAnimation(buildTabResizeAnimation(tab, mCachedTabWidth), false);
- } else {
- mStripTabs[i].setWidth(mCachedTabWidth);
- }
- }
- }
-
- private void updateStrip(long time, long dt) {
- if (mModel == null) return;
-
- // TODO(dtrainor): Remove this once tabCreated() is refactored to be called even from
- // restore.
- if (mStripTabs == null || mModel.getCount() != mStripTabs.length) {
- computeAndUpdateTabOrders(false);
- }
-
- // 1. Update the scroll offset limits
- updateScrollOffsetLimits();
-
- // 2. Calculate the ideal tab positions
- computeTabInitialPositions();
-
- // 3. Calculate the tab stacking.
- computeTabOffsetHelper();
-
- // 4. Calculate which tabs are visible.
- mStripStacker.performOcclusionPass(mModel.index(), mStripTabs);
-
- // 5. Create render list.
- createRenderList();
-
- // 6. Figure out where to put the new tab button.
- updateNewTabButtonState();
-
- // 7. Check if we have any animations and request an update if so.
- for (int i = 0; i < mStripTabs.length; i++) {
- if (mStripTabs[i].isAnimating()) {
- mUpdateHost.requestUpdate();
- break;
- }
- }
- }
-
- private void computeTabInitialPositions() {
- // Shift all of the tabs over by the the left margin because we're
- // no longer base lined at 0
- float tabPosition;
- if (!LocalizationUtils.isLayoutRtl()) {
- tabPosition = mScrollOffset + mLeftMargin;
- } else {
- tabPosition = mWidth - mCachedTabWidth - mScrollOffset - mRightMargin;
- }
-
- for (int i = 0; i < mStripTabs.length; i++) {
- StripLayoutTab tab = mStripTabs[i];
- tab.setIdealX(tabPosition);
- float delta = (tab.getWidth() - mTabOverlapWidth) * tab.getWidthWeight();
- delta = MathUtils.flipSignIf(delta, LocalizationUtils.isLayoutRtl());
- tabPosition += delta;
- }
- }
-
- private void computeTabOffsetHelper() {
- final int selIndex = mModel.index();
-
- // 1. Calculate the size of the selected tab. This is used later to figure out how
- // occluded the tabs are.
- final StripLayoutTab selTab = selIndex >= 0 ? mStripTabs[selIndex] : null;
- final float selTabWidth = selTab != null ? selTab.getWidth() : 0;
- final float selTabVisibleSize = selTabWidth - mTabStackWidth - mTabOverlapWidth;
-
- for (int i = 0; i < mStripTabs.length; i++) {
- StripLayoutTab tab = mStripTabs[i];
-
- float posX = tab.getIdealX();
-
- // 2. Calculate how many tabs are stacked on the left or the right, giving us an idea
- // of where we can stack this current tab.
- int leftStackCount = (i < selIndex) ? Math.min(i, MAX_TABS_TO_STACK)
- : Math.min(MAX_TABS_TO_STACK, selIndex)
- + Math.min(MAX_TABS_TO_STACK, i - selIndex);
-
- int rightStackCount = (i >= selIndex)
- ? Math.min(mStripTabs.length - 1 - i, MAX_TABS_TO_STACK)
- : Math.min(mStripTabs.length - 1 - selIndex, MAX_TABS_TO_STACK)
- + Math.min(selIndex - i, MAX_TABS_TO_STACK);
-
- if (LocalizationUtils.isLayoutRtl()) {
- int oldLeft = leftStackCount;
- leftStackCount = rightStackCount;
- rightStackCount = oldLeft;
- }
-
- // 3. Calculate the proper draw position for the tab. Clamp based on stacking
- // rules.
- float minDrawX = mTabStackWidth * leftStackCount + mLeftMargin;
- float maxDrawX = mWidth - mTabStackWidth * rightStackCount - mRightMargin;
-
- float drawX =
- MathUtils.clamp(posX + tab.getOffsetX(), minDrawX, maxDrawX - tab.getWidth());
-
- // TODO(dtrainor): Don't set drawX if the tab is closing?
- tab.setDrawX(drawX);
- tab.setDrawY(tab.getOffsetY());
-
- // 4. Calculate how visible this tab is.
- float visiblePercentage = 1.f;
- if (i != selIndex) {
- final float effectiveTabWidth = Math.max(tab.getWidth(), 1.f);
- final boolean leftStack =
- LocalizationUtils.isLayoutRtl() ? i > selIndex : i < selIndex;
- final float minVisible = !leftStack ? minDrawX + selTabVisibleSize : minDrawX;
- final float maxVisible = leftStack ? maxDrawX - selTabVisibleSize : maxDrawX;
-
- final float clippedTabWidth =
- Math.min(posX + effectiveTabWidth, maxVisible) - Math.max(posX, minVisible);
- visiblePercentage = MathUtils.clamp(clippedTabWidth / effectiveTabWidth, 0.f, 1.f);
- }
- tab.setVisiblePercentage(visiblePercentage);
-
- // 5. Calculate which index we start sliding content for.
- // When reordering, we don't want to slide the content of the adjacent tabs.
- int contentOffsetIndex = mInReorderMode ? selIndex + 1 : selIndex;
-
- // 6. Calculate how much the tab is overlapped on the left side or right for RTL.
- float hiddenAmount = 0.f;
- if (i > contentOffsetIndex && i > 0 && mStripStacker.canSlideTitleText()) {
- // 6.a. Get the effective right edge of the previous tab.
- final StripLayoutTab prevTab = mStripTabs[i - 1];
- final float prevLayoutWidth =
- (prevTab.getWidth() - mTabOverlapWidth) * prevTab.getWidthWeight();
- float prevTabRight = prevTab.getDrawX();
- if (!LocalizationUtils.isLayoutRtl()) prevTabRight += prevLayoutWidth;
-
- // 6.b. Subtract our current draw X from the previous tab's right edge and
- // get the percentage covered.
- hiddenAmount = Math.max(prevTabRight - drawX, 0);
- if (LocalizationUtils.isLayoutRtl()) {
- // Invert The amount because we're RTL.
- hiddenAmount = prevLayoutWidth - hiddenAmount;
- }
- }
-
- tab.setContentOffsetX(hiddenAmount);
- }
- }
-
- private void createRenderList() {
- // 1. Figure out how many tabs will need to be rendered.
- int renderCount = 0;
- for (int i = 0; i < mStripTabsVisuallyOrdered.length; ++i) {
- if (mStripTabsVisuallyOrdered[i].isVisible()) renderCount++;
- }
-
- // 2. Reallocate the render list if necessary.
- if (mStripTabsToRender.length != renderCount) {
- mStripTabsToRender = new StripLayoutTab[renderCount];
- }
-
- // 3. Populate it with the visible tabs.
- int renderIndex = 0;
- for (int i = 0; i < mStripTabsVisuallyOrdered.length; ++i) {
- if (mStripTabsVisuallyOrdered[i].isVisible()) {
- mStripTabsToRender[renderIndex++] = mStripTabsVisuallyOrdered[i];
- }
- }
- }
-
- private void updateNewTabButtonState() {
- // 1. Don't display the new tab button if we're in reorder mode.
- if (mInReorderMode || mStripTabs.length == 0) {
- mNewTabButton.setVisible(false);
- return;
- }
- mNewTabButton.setVisible(true);
-
- float leftEdge = mWidth - mRightMargin;
- float rightEdge = mLeftMargin;
-
- for (int i = 0; i < mStripTabs.length; i++) {
- StripLayoutTab tab = mStripTabs[i];
- float layoutWidth = (tab.getWidth() - mTabOverlapWidth) * tab.getWidthWeight();
- rightEdge = Math.max(tab.getDrawX() + layoutWidth, rightEdge);
- leftEdge = Math.min(tab.getDrawX(), leftEdge);
- }
- rightEdge = Math.min(rightEdge + mTabOverlapWidth, mWidth - mRightMargin);
- leftEdge = Math.max(leftEdge, mLeftMargin);
-
- rightEdge -= mTabOverlapWidth / 2;
-
- // 3. Position the new tab button.
- if (!LocalizationUtils.isLayoutRtl()) {
- mNewTabButton.setX(rightEdge);
- } else {
- mNewTabButton.setX(leftEdge - mNewTabButtonWidth);
- }
- }
-
- private float calculateOffsetToMakeTabVisible(StripLayoutTab tab, boolean canExpandSelectedTab,
- boolean canExpandLeft, boolean canExpandRight) {
- if (tab == null) return 0.f;
-
- final int selIndex = mModel.index();
- final int index = TabModelUtils.getTabIndexById(mModel, tab.getId());
-
- // 1. The selected tab is always visible. Early out unless we want to unstack it.
- if (selIndex == index && !canExpandSelectedTab) return 0.f;
-
- // TODO(dtrainor): Use real tab widths here?
- float stripWidth = mWidth - mLeftMargin - mRightMargin;
- final float tabWidth = mCachedTabWidth - mTabOverlapWidth;
-
- // TODO(dtrainor): Handle maximum number of tabs that can be visibly stacked in these
- // optimal positions.
-
- // 2. Calculate the optimal minimum and maximum scroll offsets to show the tab.
- float optimalLeft = -index * tabWidth;
- float optimalRight = stripWidth - (index + 1) * tabWidth;
-
- // 3. Account for the selected tab always being visible. Need to buffer by one extra
- // tab width depending on if the tab is to the left or right of the selected tab.
- if (index < selIndex) {
- optimalRight -= tabWidth;
- } else if (index > selIndex) {
- optimalLeft += tabWidth;
- }
-
- // 4. Return the proper deltaX that has to be applied to the current scroll to see the
- // tab.
- if (mScrollOffset < optimalLeft && canExpandLeft) {
- return optimalLeft - mScrollOffset;
- } else if (mScrollOffset > optimalRight && canExpandRight) {
- return optimalRight - mScrollOffset;
- }
-
- // 5. We don't have to do anything. Return no delta.
- return 0.f;
- }
-
- private StripLayoutTab getTabAtPosition(float x) {
- for (int i = mStripTabsVisuallyOrdered.length - 1; i >= 0; i--) {
- final StripLayoutTab tab = mStripTabsVisuallyOrdered[i];
- if (tab.isVisible() && tab.getDrawX() <= x && x <= (tab.getDrawX() + tab.getWidth())) {
- return tab;
- }
- }
-
- return null;
- }
-
- /**
- * @param tab The StripLayoutTab to look for.
- * @return The index of the tab in the visual ordering.
- */
- @VisibleForTesting
- public int visualIndexOfTab(StripLayoutTab tab) {
- for (int i = 0; i < mStripTabsVisuallyOrdered.length; i++) {
- if (mStripTabsVisuallyOrdered[i] == tab) {
- return i;
- }
- }
- return -1;
- }
-
- /**
- * @param tab The StripLayoutTab you're looking at.
- * @return Whether or not this tab is the foreground tab.
- */
- @VisibleForTesting
- public boolean isForegroundTab(StripLayoutTab tab) {
- return tab == mStripTabsVisuallyOrdered[mStripTabsVisuallyOrdered.length - 1];
- }
-
- private void startReorderMode(long time, float currentX, float startX) {
- if (mInReorderMode) return;
-
- // 1. Reset the last pressed close button state.
- if (mLastPressedCloseButton != null && mLastPressedCloseButton.isPressed()) {
- mLastPressedCloseButton.setPressed(false);
- }
- mLastPressedCloseButton = null;
-
- // 2. Check to see if we have a valid tab to start dragging.
- mInteractingTab = getTabAtPosition(startX);
- if (mInteractingTab == null) return;
-
- // 3. Set initial state parameters.
- mLastReorderScrollTime = 0;
- mReorderState = REORDER_SCROLL_NONE;
- mLastReorderX = startX;
- mInReorderMode = true;
-
- // 4. Select this tab so that it is always in the foreground.
- TabModelUtils.setIndex(
- mModel, TabModelUtils.getTabIndexById(mModel, mInteractingTab.getId()));
-
- // 5. Fast expand to make sure this tab is visible.
- float fastExpandDelta = calculateOffsetToMakeTabVisible(mInteractingTab, true, true, true);
- mScroller.startScroll(mScrollOffset, 0, (int) fastExpandDelta, 0, time, EXPAND_DURATION_MS);
-
- // 6. Request an update.
- mUpdateHost.requestUpdate();
- }
-
- private void stopReorderMode() {
- if (!mInReorderMode) return;
-
- // 1. Reset the state variables.
- mLastReorderScrollTime = 0;
- mReorderState = REORDER_SCROLL_NONE;
- mLastReorderX = 0.f;
- mInReorderMode = false;
-
- // 2. Clear any drag offset.
- startAnimation(buildTabMoveAnimation(mInteractingTab, mInteractingTab.getOffsetX()), true);
-
- // 3. Request an update.
- mUpdateHost.requestUpdate();
- }
-
- private void updateReorderPosition(float deltaX) {
- if (!mInReorderMode || mInteractingTab == null) return;
-
- float offset = mInteractingTab.getOffsetX() + deltaX;
- int curIndex = findIndexForTab(mInteractingTab.getId());
-
- // 1. Compute the reorder threshold values.
- final float flipWidth = mCachedTabWidth - mTabOverlapWidth;
- final float flipThreshold = REORDER_OVERLAP_SWITCH_PERCENTAGE * flipWidth;
-
- // 2. Check if we should swap tabs and track the new destination index.
- int destIndex = TabModel.INVALID_TAB_INDEX;
- boolean pastLeftThreshold = offset < -flipThreshold;
- boolean pastRightThreshold = offset > flipThreshold;
- boolean isNotRightMost = curIndex < mStripTabs.length - 1;
- boolean isNotLeftMost = curIndex > 0;
-
- if (LocalizationUtils.isLayoutRtl()) {
- boolean oldLeft = pastLeftThreshold;
- pastLeftThreshold = pastRightThreshold;
- pastRightThreshold = oldLeft;
- }
-
- if (pastRightThreshold && isNotRightMost) {
- destIndex = curIndex + 2;
- } else if (pastLeftThreshold && isNotLeftMost) {
- destIndex = curIndex - 1;
- }
-
- // 3. If we should swap tabs, make the swap.
- if (destIndex != TabModel.INVALID_TAB_INDEX) {
- // 3.a. Since we're about to move the tab we're dragging, adjust it's offset so it
- // stays in the same apparent position.
- boolean shouldFlip =
- LocalizationUtils.isLayoutRtl() ? destIndex < curIndex : destIndex > curIndex;
- offset += MathUtils.flipSignIf(flipWidth, shouldFlip);
-
- // 3.b. Swap the tabs.
- reorderTab(mInteractingTab.getId(), curIndex, destIndex, true);
- mModel.moveTab(mInteractingTab.getId(), destIndex);
-
- // 3.c. Update our curIndex as we have just moved the tab.
- curIndex += destIndex > curIndex ? 1 : -1;
-
- // 3.d. Update visual tab ordering.
- updateVisualTabOrdering();
- }
-
- // 4. Limit offset based on tab position. First tab can't drag left, last tab can't drag
- // right.
- if (curIndex == 0) {
- offset =
- LocalizationUtils.isLayoutRtl() ? Math.min(0.f, offset) : Math.max(0.f, offset);
- }
- if (curIndex == mStripTabs.length - 1) {
- offset =
- LocalizationUtils.isLayoutRtl() ? Math.max(0.f, offset) : Math.min(0.f, offset);
- }
-
- // 5. Set the new offset.
- mInteractingTab.setOffsetX(offset);
- }
-
- private void reorderTab(int id, int oldIndex, int newIndex, boolean animate) {
- StripLayoutTab tab = findTabById(id);
- if (tab == null || oldIndex == newIndex) return;
-
- // 1. If the tab is already at the right spot, don't do anything.
- int index = findIndexForTab(id);
- if (index == newIndex) return;
-
- // 2. Check if it's the tab we are dragging, but we have an old source index. Ignore in
- // this case because we probably just already moved it.
- if (mInReorderMode && index != oldIndex && tab == mInteractingTab) return;
-
- // 3. Swap the tabs.
- moveElement(mStripTabs, index, newIndex);
-
- // 4. Update newIndex to point to the proper element.
- if (index < newIndex) newIndex--;
-
- // 5. Animate if necessary.
- if (animate) {
- final float flipWidth = mCachedTabWidth - mTabOverlapWidth;
- final int direction = oldIndex <= newIndex ? 1 : -1;
- final float animationLength =
- MathUtils.flipSignIf(direction * flipWidth, LocalizationUtils.isLayoutRtl());
- StripLayoutTab slideTab = mStripTabs[newIndex - direction];
- startAnimation(buildTabMoveAnimation(slideTab, animationLength), true);
- }
- }
-
- private void handleReorderAutoScrolling(long time) {
- if (!mInReorderMode) return;
-
- // 1. Track the delta time since the last auto scroll.
- final float deltaSec =
- mLastReorderScrollTime == 0 ? 0.f : (time - mLastReorderScrollTime) / 1000.f;
- mLastReorderScrollTime = time;
-
- final float x = mInteractingTab.getDrawX();
-
- // 2. Calculate the gutters for accelerating the scroll speed.
- // Speed: MAX MIN MIN MAX
- // |-------|======|--------------------|======|-------|
- final float dragRange = REORDER_EDGE_SCROLL_START_MAX_DP - REORDER_EDGE_SCROLL_START_MIN_DP;
- final float leftMinX = REORDER_EDGE_SCROLL_START_MIN_DP + mLeftMargin;
- final float leftMaxX = REORDER_EDGE_SCROLL_START_MAX_DP + mLeftMargin;
- final float rightMinX =
- mWidth - mLeftMargin - mRightMargin - REORDER_EDGE_SCROLL_START_MIN_DP;
- final float rightMaxX =
- mWidth - mLeftMargin - mRightMargin - REORDER_EDGE_SCROLL_START_MAX_DP;
-
- // 3. See if the current draw position is in one of the gutters and figure out how far in.
- // Note that we only allow scrolling in each direction if the user has already manually
- // moved that way.
- float dragSpeedRatio = 0.f;
- if ((mReorderState & REORDER_SCROLL_LEFT) != 0 && x < leftMinX) {
- dragSpeedRatio = -(leftMinX - Math.max(x, leftMaxX)) / dragRange;
- } else if ((mReorderState & REORDER_SCROLL_RIGHT) != 0 && x + mCachedTabWidth > rightMinX) {
- dragSpeedRatio = (Math.min(x + mCachedTabWidth, rightMaxX) - rightMinX) / dragRange;
- }
-
- dragSpeedRatio = MathUtils.flipSignIf(dragSpeedRatio, LocalizationUtils.isLayoutRtl());
-
- if (dragSpeedRatio != 0.f) {
- // 4.a. We're in a gutter. Update the scroll offset.
- float dragSpeed = REORDER_EDGE_SCROLL_MAX_SPEED_DP * dragSpeedRatio;
- updateScrollOffsetPosition((int) (mScrollOffset + dragSpeed * deltaSec));
-
- mUpdateHost.requestUpdate();
- } else {
- // 4.b. We're not in a gutter. Reset the scroll delta time tracker.
- mLastReorderScrollTime = 0;
- }
- }
-
- private void resetResizeTimeout(boolean postIfNotPresent) {
- final boolean present = mStripTabEventHandler.hasMessages(MESSAGE_RESIZE);
-
- if (present) mStripTabEventHandler.removeMessages(MESSAGE_RESIZE);
-
- if (present || postIfNotPresent) {
- mStripTabEventHandler.sendEmptyMessageAtTime(MESSAGE_RESIZE, RESIZE_DELAY_MS);
- }
- }
-
- private class StripTabEventHandler extends Handler {
- @Override
- public void handleMessage(Message m) {
- switch (m.what) {
- case MESSAGE_RESIZE:
- computeAndUpdateTabWidth(true);
- mUpdateHost.requestUpdate();
- break;
- case MESSAGE_UPDATE_SPINNER:
- mUpdateHost.requestUpdate();
- break;
- default:
- assert false : "StripTabEventHandler got unknown message " + m.what;
- }
- }
- }
-
- private class TabLoadTrackerCallbackImpl implements TabLoadTrackerCallback {
- @Override
- public void loadStateChanged(int id) {
- mUpdateHost.requestUpdate();
- }
- }
-
- private static Animation<Animatable<?>> buildTabCreatedAnimation(StripLayoutTab tab) {
- return createAnimation(tab, StripLayoutTab.Property.Y_OFFSET, tab.getHeight(), 0.f,
- ANIM_TAB_CREATED_MS, 0, false, ChromeAnimation.getLinearInterpolator());
- }
-
- private static Animation<Animatable<?>> buildTabClosedAnimation(StripLayoutTab tab) {
- return createAnimation(tab, StripLayoutTab.Property.Y_OFFSET, tab.getOffsetY(),
- tab.getHeight(), ANIM_TAB_CLOSED_MS, 0, false,
- ChromeAnimation.getLinearInterpolator());
- }
-
- private static Animation<Animatable<?>> buildTabResizeAnimation(
- StripLayoutTab tab, float width) {
- return createAnimation(tab, StripLayoutTab.Property.WIDTH, tab.getWidth(), width,
- ANIM_TAB_RESIZE_MS, 0, false, ChromeAnimation.getLinearInterpolator());
- }
-
- private static Animation<Animatable<?>> buildTabMoveAnimation(
- StripLayoutTab tab, float startX) {
- return createAnimation(tab, StripLayoutTab.Property.X_OFFSET, startX, 0.f, ANIM_TAB_MOVE_MS,
- 0, false, ChromeAnimation.getLinearInterpolator());
- }
-
- private static <T> void moveElement(T[] array, int oldIndex, int newIndex) {
- if (oldIndex <= newIndex) {
- moveElementUp(array, oldIndex, newIndex);
- } else {
- moveElementDown(array, oldIndex, newIndex);
- }
- }
-
- private static <T> void moveElementUp(T[] array, int oldIndex, int newIndex) {
- assert oldIndex <= newIndex;
- if (oldIndex == newIndex || oldIndex + 1 == newIndex) return;
-
- T elem = array[oldIndex];
- for (int i = oldIndex; i < newIndex - 1; i++) {
- array[i] = array[i + 1];
- }
- array[newIndex - 1] = elem;
- }
-
- private static <T> void moveElementDown(T[] array, int oldIndex, int newIndex) {
- assert oldIndex >= newIndex;
- if (oldIndex == newIndex) return;
-
- T elem = array[oldIndex];
- for (int i = oldIndex - 1; i >= newIndex; i--) {
- array[i + 1] = array[i];
- }
- array[newIndex] = elem;
- }
-
- /**
- * Sets the current scroll offset of the TabStrip.
- * @param offset The offset to set the TabStrip's scroll state to.
- */
- @VisibleForTesting
- public void testSetScrollOffset(int offset) {
- mScrollOffset = offset;
- }
-
- /**
- * Starts a fling with the specified velocity.
- * @param velocity The velocity to trigger the fling with. Negative to go left, positive to go
- * right.
- */
- @VisibleForTesting
- public void testFling(float velocity) {
- fling(SystemClock.uptimeMillis(), 0, 0, velocity, 0);
- }
-
- /**
- * Displays the tab menu below the anchor tab.
- * @param anchorTab The tab the menu will be anchored to
- */
- private void showTabMenu(StripLayoutTab anchorTab) {
- // 1. Bring the anchor tab to the foreground.
- int tabIndex = TabModelUtils.getTabIndexById(mModel, anchorTab.getId());
- TabModelUtils.setIndex(mModel, tabIndex);
-
- // 2. Anchor the popupMenu to the view associated with the tab
- View tabView = TabModelUtils.getCurrentTab(mModel).getView();
- mTabMenu.setAnchorView(tabView);
-
- // 3. Set the vertical offset to align the tab menu with bottom of the tab strip
- int verticalOffset =
- -(tabView.getHeight()
- - (int) mContext.getResources().getDimension(R.dimen.tab_strip_height))
- - ((MarginLayoutParams) tabView.getLayoutParams()).topMargin;
- mTabMenu.setVerticalOffset(verticalOffset);
-
- // 4. Set the horizontal offset to align the tab menu with the right side of the tab
- int horizontalOffset = Math.round((anchorTab.getDrawX() + anchorTab.getWidth())
- * mContext.getResources().getDisplayMetrics().density)
- - mTabMenu.getWidth()
- - ((MarginLayoutParams) tabView.getLayoutParams()).leftMargin;
- mTabMenu.setHorizontalOffset(horizontalOffset);
-
- mTabMenu.show();
- }
-
- /**
- * @return true if the tab menu is showing
- */
- @VisibleForTesting
- public boolean isTabMenuShowing() {
- return mTabMenu.isShowing();
- }
-
- /**
- * @param menuItemId The id of the menu item to click
- */
- @VisibleForTesting
- public void clickTabMenuItem(int menuItemId) {
- mTabMenu.performItemClick(menuItemId);
- }
-}
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