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1 // Copyright 2017 The Chromium Authors. All rights reserved. | 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 package org.chromium.chrome.browser.contextmenu; | 5 package org.chromium.chrome.browser.contextmenu; |
6 | 6 |
7 import android.animation.Animator; | |
8 import android.animation.AnimatorListenerAdapter; | |
9 import android.animation.ValueAnimator; | |
10 import android.animation.ValueAnimator.AnimatorUpdateListener; | |
7 import android.content.Context; | 11 import android.content.Context; |
12 import android.graphics.Canvas; | |
13 import android.graphics.Rect; | |
14 import android.graphics.drawable.Drawable; | |
8 import android.support.v4.view.ViewPager; | 15 import android.support.v4.view.ViewPager; |
16 import android.support.v4.view.animation.LinearOutSlowInInterpolator; | |
9 import android.util.AttributeSet; | 17 import android.util.AttributeSet; |
10 import android.view.View; | 18 import android.view.View; |
11 | 19 |
20 import org.chromium.base.ApiCompatibilityUtils; | |
12 import org.chromium.chrome.R; | 21 import org.chromium.chrome.R; |
22 import org.chromium.chrome.browser.util.MathUtils; | |
13 | 23 |
14 /** | 24 /** |
15 * When there is more than one view for the context menu to display, it wraps th e display in a view | 25 * When there is more than one view for the context menu to display, it wraps th e display in a view |
16 * pager. | 26 * pager. |
17 */ | 27 */ |
18 public class TabularContextMenuViewPager extends ViewPager { | 28 public class TabularContextMenuViewPager extends ViewPager { |
29 private static final int ANIMATION_DURATION_MS = 250; | |
30 | |
31 private ValueAnimator mAnimator; | |
32 private int mOldHeight; | |
33 private int mCanvasWidth; | |
34 private int mClipHeight; | |
35 | |
36 private int mDifferenceInHeight = 0; | |
37 private int mPreviousChildIndex = 1; | |
19 private final int mContextMenuMinimumPaddingPx = | 38 private final int mContextMenuMinimumPaddingPx = |
20 getResources().getDimensionPixelSize(R.dimen.context_menu_min_paddin g); | 39 getResources().getDimensionPixelSize(R.dimen.context_menu_min_paddin g); |
40 private Canvas mCanvas; | |
41 private final Drawable mDrawable = ApiCompatibilityUtils.getDrawable( | |
42 getResources(), R.drawable.white_with_rounded_corners); | |
21 | 43 |
22 public TabularContextMenuViewPager(Context context) { | 44 public TabularContextMenuViewPager(Context context) { |
23 super(context); | 45 super(context); |
46 mDrawable.mutate(); | |
24 } | 47 } |
25 | 48 |
26 public TabularContextMenuViewPager(Context context, AttributeSet attrs) { | 49 public TabularContextMenuViewPager(Context context, AttributeSet attrs) { |
27 super(context, attrs); | 50 super(context, attrs); |
51 mDrawable.mutate(); | |
28 } | 52 } |
29 | 53 |
30 /** | 54 /** |
31 * Used to show the full ViewPager dialog. Without this the dialog would hav e no height or | 55 * Used to show the full ViewPager dialog. Without this the dialog would hav e no height or |
32 * width. | 56 * width. |
33 */ | 57 */ |
34 @Override | 58 @Override |
35 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { | 59 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
60 int tabHeight = 0; | |
36 int menuHeight = 0; | 61 int menuHeight = 0; |
37 int tabHeight = 0; | |
38 | |
39 // getCurrentItem() does not take into account the tab layout unlike get ChildCount(). | |
40 int currentItemsIndex = getCurrentItem() + 1; | |
41 | 62 |
42 // The width of the context menu is defined so that it leaves space betw een itself and the | 63 // The width of the context menu is defined so that it leaves space betw een itself and the |
43 // screen's edges. It is also bounded to a max size to prevent the menu from stretching | 64 // screen's edges. It is also bounded to a max size to prevent the menu from stretching |
44 // across a large display (e.g. a tablet screen). | 65 // across a large display (e.g. a tablet screen). |
45 int deviceWidthPx = getResources().getDisplayMetrics().widthPixels; | 66 int appWindowWidthPx = getResources().getDisplayMetrics().widthPixels; |
46 int contextMenuWidth = Math.min(deviceWidthPx - 2 * mContextMenuMinimumP addingPx, | 67 int contextMenuWidth = Math.min(appWindowWidthPx - 2 * mContextMenuMinim umPaddingPx, |
47 getResources().getDimensionPixelSize(R.dimen.context_menu_max_wi dth)); | 68 getResources().getDimensionPixelSize(R.dimen.context_menu_max_wi dth)); |
48 | 69 |
49 widthMeasureSpec = MeasureSpec.makeMeasureSpec(contextMenuWidth, Measure Spec.EXACTLY); | 70 widthMeasureSpec = MeasureSpec.makeMeasureSpec(contextMenuWidth, Measure Spec.EXACTLY); |
50 | 71 |
51 // The height of the context menu is calculated as the sum of: | 72 // getCurrentItem() does not take into account the tab layout unlike get ChildCount(). |
52 // 1. The tab bar's height, which is only visible when the context menu requires it | 73 int currentChildIndex = getCurrentItem() + 1; |
53 // (i.e. an ImageLink is clicked) | |
54 // 2. The height of the View being displayed for the current tab. | |
55 for (int i = 0; i < getChildCount(); i++) { | |
56 View child = getChildAt(i); | |
57 | 74 |
58 child.measure( | 75 // Handles the case where this is called while the pager is scrolling be tween views. |
59 widthMeasureSpec, MeasureSpec.makeMeasureSpec(0, MeasureSpec .UNSPECIFIED)); | 76 if (getScrollX() != 0 && getScrollX() != mCanvasWidth) { |
60 int measuredHeight = child.getMeasuredHeight(); | 77 heightMeasureSpec = MeasureSpec.makeMeasureSpec(mOldHeight, MeasureS pec.EXACTLY); |
78 } else { | |
79 // The height of the context menu is calculated as the sum of: | |
80 // 1. The tab bar's height, which is only visible when the context m enu requires it | |
81 // (i.e. an ImageLink is clicked) | |
82 // 2. The height of the View being displayed for the current tab. | |
83 for (int i = 0; i < getChildCount(); i++) { | |
84 View child = getChildAt(i); | |
85 child.measure( | |
86 widthMeasureSpec, MeasureSpec.makeMeasureSpec(0, Measure Spec.UNSPECIFIED)); | |
87 int measuredHeight = child.getMeasuredHeight(); | |
61 | 88 |
62 // The ViewPager also considers the tab layout one of its children, and needs to be | 89 // The ViewPager also considers the tab layout one of its childr en, and needs to be |
63 // treated separately from getting the largest height. | 90 // treated separately from getting the largest height. |
64 if (child.getId() == R.id.tab_layout && child.getVisibility() != GON E) { | 91 if (child.getId() == R.id.tab_layout && child.getVisibility() != GONE) { |
65 tabHeight = measuredHeight; | 92 tabHeight = measuredHeight; |
66 } else if (i == currentItemsIndex) { | 93 } else if (i == currentChildIndex) { |
67 menuHeight = child.getMeasuredHeight(); | 94 menuHeight = child.getMeasuredHeight(); |
68 break; | 95 break; |
96 } | |
97 } | |
98 int fullHeight = menuHeight + tabHeight; | |
99 int appWindowHeightPx = getResources().getDisplayMetrics().heightPix els; | |
100 fullHeight = Math.min(fullHeight, appWindowHeightPx - 2 * mContextMe nuMinimumPaddingPx); | |
101 mDifferenceInHeight = fullHeight - mOldHeight; | |
102 | |
103 if (currentChildIndex == mPreviousChildIndex) { | |
104 // Handles the snapping and re-clipping of the view when its hei ght changes | |
105 // (i.e. an image finished loading or the link became fully visi ble). | |
106 mClipHeight = fullHeight; | |
107 if (menuHeight != 0) mOldHeight = fullHeight; | |
108 heightMeasureSpec = MeasureSpec.makeMeasureSpec(fullHeight, Meas ureSpec.EXACTLY); | |
109 // Clip logic is not called on orientation changes, so it must b e set here. | |
110 setClipDimensionsForResize(contextMenuWidth); | |
111 } else { | |
112 // Handles the case where the view pager has completely scrolled to a different | |
113 // child. | |
114 initAnimator(); | |
115 heightMeasureSpec = MeasureSpec.makeMeasureSpec( | |
116 Math.max(mOldHeight, fullHeight), MeasureSpec.EXACTLY); | |
117 mAnimator.start(); | |
69 } | 118 } |
70 } | 119 } |
120 super.onMeasure(widthMeasureSpec, heightMeasureSpec); | |
121 mPreviousChildIndex = currentChildIndex; | |
122 } | |
71 | 123 |
72 // Cap the height of the context menu so that it fits on the screen with out touching the | 124 public void setClipDimensionsForResize(int width) { |
73 // screen's edges. | 125 if (mCanvas != null) mCanvas.clipRect(new Rect(0, 0, width, mClipHeight) ); |
Theresa
2017/07/19 15:23:20
Is this needed now that you're setting the clipRec
Daniel Park
2017/07/19 20:26:44
Removed.
| |
74 int fullHeight = menuHeight + tabHeight; | 126 } |
75 int deviceHeightPx = getResources().getDisplayMetrics().heightPixels; | |
76 fullHeight = Math.min(fullHeight, deviceHeightPx - 2 * mContextMenuMinim umPaddingPx); | |
77 | 127 |
78 heightMeasureSpec = MeasureSpec.makeMeasureSpec(fullHeight, MeasureSpec. EXACTLY); | 128 private void initAnimator() { |
79 super.onMeasure(widthMeasureSpec, heightMeasureSpec); | 129 if (mAnimator != null) return; |
130 mAnimator = ValueAnimator.ofFloat(0f, 1f); | |
131 mAnimator.setDuration(ANIMATION_DURATION_MS); | |
132 mAnimator.setInterpolator(new LinearOutSlowInInterpolator()); | |
133 mAnimator.addUpdateListener(new AnimatorUpdateListener() { | |
134 | |
135 @Override | |
136 public void onAnimationUpdate(ValueAnimator animation) { | |
137 float animatedValue = (float) animation.getAnimatedValue(); | |
138 // If the animation duration is long enough (e.g. 5x, 10x), anim atedValue will | |
139 // undesirably be set to 1f more than once. | |
140 if (mDifferenceInHeight < 0) { | |
141 setTranslationY(animatedValue * -mDifferenceInHeight / 2); | |
142 } else { | |
143 setTranslationY((1 - animatedValue) * mDifferenceInHeight / 2); | |
144 } | |
145 mClipHeight = mOldHeight + (int) (mDifferenceInHeight * animated Value); | |
146 invalidate(); | |
147 if (MathUtils.areFloatsEqual(animatedValue, 1f)) { | |
148 return; | |
149 } | |
150 } | |
151 }); | |
152 mAnimator.addListener(new AnimatorListenerAdapter() { | |
153 @Override | |
154 public void onAnimationEnd(Animator animation) { | |
155 mOldHeight = mClipHeight; | |
156 setTranslationY(0); | |
157 if (mDifferenceInHeight < 0) requestLayout(); | |
158 } | |
159 }); | |
160 } | |
161 | |
162 @Override | |
163 public void onDraw(Canvas canvas) { | |
164 mCanvasWidth = canvas.getWidth(); | |
165 int backgroundOffsetX = getScrollX(); | |
166 mDrawable.setBounds( | |
167 backgroundOffsetX, 0, canvas.getWidth() + backgroundOffsetX, mCl ipHeight); | |
168 mDrawable.draw(canvas); | |
169 boolean clipped = false; | |
170 if (mClipHeight != 0) { | |
171 canvas.save(); | |
172 canvas.clipRect(0, 0, mCanvasWidth, mClipHeight); | |
173 clipped = true; | |
174 } | |
175 super.onDraw(canvas); | |
176 if (clipped) { | |
177 canvas.restore(); | |
178 } | |
179 mCanvas = canvas; | |
80 } | 180 } |
81 } | 181 } |
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