| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.internal.widget; |
| |
| import android.view.ViewGroup; |
| import com.android.internal.app.ActionBarImpl; |
| |
| import android.content.Context; |
| import android.content.res.TypedArray; |
| import android.graphics.Rect; |
| import android.util.AttributeSet; |
| import android.view.View; |
| |
| /** |
| * Special layout for the containing of an overlay action bar (and its |
| * content) to correctly handle fitting system windows when the content |
| * has request that its layout ignore them. |
| */ |
| public class ActionBarOverlayLayout extends ViewGroup { |
| private int mActionBarHeight; |
| private ActionBarImpl mActionBar; |
| private int mWindowVisibility = View.VISIBLE; |
| |
| // The main UI elements that we handle the layout of. |
| private View mContent; |
| private View mActionBarTop; |
| private View mActionBarBottom; |
| |
| // Some interior UI elements. |
| private ActionBarContainer mContainerView; |
| private ActionBarView mActionView; |
| |
| private boolean mOverlayMode; |
| private int mLastSystemUiVisibility; |
| private final Rect mBaseContentInsets = new Rect(); |
| private final Rect mLastBaseContentInsets = new Rect(); |
| private final Rect mContentInsets = new Rect(); |
| private final Rect mBaseInnerInsets = new Rect(); |
| private final Rect mInnerInsets = new Rect(); |
| private final Rect mLastInnerInsets = new Rect(); |
| |
| static final int[] mActionBarSizeAttr = new int [] { |
| com.android.internal.R.attr.actionBarSize |
| }; |
| |
| public ActionBarOverlayLayout(Context context) { |
| super(context); |
| init(context); |
| } |
| |
| public ActionBarOverlayLayout(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| init(context); |
| } |
| |
| private void init(Context context) { |
| TypedArray ta = getContext().getTheme().obtainStyledAttributes(mActionBarSizeAttr); |
| mActionBarHeight = ta.getDimensionPixelSize(0, 0); |
| ta.recycle(); |
| } |
| |
| public void setActionBar(ActionBarImpl impl, boolean overlayMode) { |
| mActionBar = impl; |
| mOverlayMode = overlayMode; |
| if (getWindowToken() != null) { |
| // This is being initialized after being added to a window; |
| // make sure to update all state now. |
| mActionBar.setWindowVisibility(mWindowVisibility); |
| if (mLastSystemUiVisibility != 0) { |
| int newVis = mLastSystemUiVisibility; |
| onWindowSystemUiVisibilityChanged(newVis); |
| requestFitSystemWindows(); |
| } |
| } |
| } |
| |
| public void setShowingForActionMode(boolean showing) { |
| if (showing) { |
| // Here's a fun hack: if the status bar is currently being hidden, |
| // and the application has asked for stable content insets, then |
| // we will end up with the action mode action bar being shown |
| // without the status bar, but moved below where the status bar |
| // would be. Not nice. Trying to have this be positioned |
| // correctly is not easy (basically we need yet *another* content |
| // inset from the window manager to know where to put it), so |
| // instead we will just temporarily force the status bar to be shown. |
| if ((getWindowSystemUiVisibility() & (SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN |
| | SYSTEM_UI_FLAG_LAYOUT_STABLE)) |
| == (SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | SYSTEM_UI_FLAG_LAYOUT_STABLE)) { |
| setDisabledSystemUiVisibility(SYSTEM_UI_FLAG_FULLSCREEN); |
| } |
| } else { |
| setDisabledSystemUiVisibility(0); |
| } |
| } |
| |
| @Override |
| public void onWindowSystemUiVisibilityChanged(int visible) { |
| super.onWindowSystemUiVisibilityChanged(visible); |
| pullChildren(); |
| final int diff = mLastSystemUiVisibility ^ visible; |
| mLastSystemUiVisibility = visible; |
| final boolean barVisible = (visible&SYSTEM_UI_FLAG_FULLSCREEN) == 0; |
| final boolean wasVisible = mActionBar != null ? mActionBar.isSystemShowing() : true; |
| final boolean stable = (visible&SYSTEM_UI_FLAG_LAYOUT_STABLE) != 0; |
| if (mActionBar != null) { |
| // We want the bar to be visible if it is not being hidden, |
| // or the app has not turned on a stable UI mode (meaning they |
| // are performing explicit layout around the action bar). |
| mActionBar.enableContentAnimations(!stable); |
| if (barVisible || !stable) mActionBar.showForSystem(); |
| else mActionBar.hideForSystem(); |
| } |
| if ((diff&SYSTEM_UI_FLAG_LAYOUT_STABLE) != 0) { |
| if (mActionBar != null) { |
| requestFitSystemWindows(); |
| } |
| } |
| } |
| |
| @Override |
| protected void onWindowVisibilityChanged(int visibility) { |
| super.onWindowVisibilityChanged(visibility); |
| mWindowVisibility = visibility; |
| if (mActionBar != null) { |
| mActionBar.setWindowVisibility(visibility); |
| } |
| } |
| |
| private boolean applyInsets(View view, Rect insets, boolean left, boolean top, |
| boolean bottom, boolean right) { |
| boolean changed = false; |
| LayoutParams lp = (LayoutParams)view.getLayoutParams(); |
| if (left && lp.leftMargin != insets.left) { |
| changed = true; |
| lp.leftMargin = insets.left; |
| } |
| if (top && lp.topMargin != insets.top) { |
| changed = true; |
| lp.topMargin = insets.top; |
| } |
| if (right && lp.rightMargin != insets.right) { |
| changed = true; |
| lp.rightMargin = insets.right; |
| } |
| if (bottom && lp.bottomMargin != insets.bottom) { |
| changed = true; |
| lp.bottomMargin = insets.bottom; |
| } |
| return changed; |
| } |
| |
| @Override |
| protected boolean fitSystemWindows(Rect insets) { |
| pullChildren(); |
| |
| final int vis = getWindowSystemUiVisibility(); |
| final boolean stable = (vis & SYSTEM_UI_FLAG_LAYOUT_STABLE) != 0; |
| |
| // The top and bottom action bars are always within the content area. |
| boolean changed = applyInsets(mActionBarTop, insets, true, true, false, true); |
| if (mActionBarBottom != null) { |
| changed |= applyInsets(mActionBarBottom, insets, true, false, true, true); |
| } |
| |
| mBaseInnerInsets.set(insets); |
| computeFitSystemWindows(mBaseInnerInsets, mBaseContentInsets); |
| if (!mLastBaseContentInsets.equals(mBaseContentInsets)) { |
| changed = true; |
| mLastBaseContentInsets.set(mBaseContentInsets); |
| } |
| |
| if (changed) { |
| requestLayout(); |
| } |
| |
| // We don't do any more at this point. To correctly compute the content/inner |
| // insets in all cases, we need to know the measured size of the various action |
| // bar elements. fitSystemWindows() happens before the measure pass, so we can't |
| // do that here. Instead we will take this up in onMeasure(). |
| return true; |
| } |
| |
| @Override |
| protected LayoutParams generateDefaultLayoutParams() { |
| return new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT); |
| } |
| |
| @Override |
| public LayoutParams generateLayoutParams(AttributeSet attrs) { |
| return new LayoutParams(getContext(), attrs); |
| } |
| |
| @Override |
| protected ViewGroup.LayoutParams generateLayoutParams(ViewGroup.LayoutParams p) { |
| return new LayoutParams(p); |
| } |
| |
| @Override |
| protected boolean checkLayoutParams(ViewGroup.LayoutParams p) { |
| return p instanceof LayoutParams; |
| } |
| |
| @Override |
| protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| pullChildren(); |
| |
| int maxHeight = 0; |
| int maxWidth = 0; |
| int childState = 0; |
| |
| int topInset = 0; |
| int bottomInset = 0; |
| |
| measureChildWithMargins(mActionBarTop, widthMeasureSpec, 0, heightMeasureSpec, 0); |
| LayoutParams lp = (LayoutParams) mActionBarTop.getLayoutParams(); |
| maxWidth = Math.max(maxWidth, |
| mActionBarTop.getMeasuredWidth() + lp.leftMargin + lp.rightMargin); |
| maxHeight = Math.max(maxHeight, |
| mActionBarTop.getMeasuredHeight() + lp.topMargin + lp.bottomMargin); |
| childState = combineMeasuredStates(childState, mActionBarTop.getMeasuredState()); |
| |
| // xlarge screen layout doesn't have bottom action bar. |
| if (mActionBarBottom != null) { |
| measureChildWithMargins(mActionBarBottom, widthMeasureSpec, 0, heightMeasureSpec, 0); |
| lp = (LayoutParams) mActionBarBottom.getLayoutParams(); |
| maxWidth = Math.max(maxWidth, |
| mActionBarBottom.getMeasuredWidth() + lp.leftMargin + lp.rightMargin); |
| maxHeight = Math.max(maxHeight, |
| mActionBarBottom.getMeasuredHeight() + lp.topMargin + lp.bottomMargin); |
| childState = combineMeasuredStates(childState, mActionBarBottom.getMeasuredState()); |
| } |
| |
| final int vis = getWindowSystemUiVisibility(); |
| final boolean stable = (vis & SYSTEM_UI_FLAG_LAYOUT_STABLE) != 0; |
| |
| if (stable) { |
| // This is the standard space needed for the action bar. For stable measurement, |
| // we can't depend on the size currently reported by it -- this must remain constant. |
| topInset = mActionBarHeight; |
| if (mActionBar != null && mActionBar.hasNonEmbeddedTabs()) { |
| View tabs = mContainerView.getTabContainer(); |
| if (tabs != null) { |
| // If tabs are not embedded, increase space on top to account for them. |
| topInset += mActionBarHeight; |
| } |
| } |
| } else if (mActionBarTop.getVisibility() == VISIBLE) { |
| // This is the space needed on top of the window for all of the action bar |
| // and tabs. |
| topInset = mActionBarTop.getMeasuredHeight(); |
| } |
| |
| if (mActionView.isSplitActionBar()) { |
| // If action bar is split, adjust bottom insets for it. |
| if (mActionBarBottom != null) { |
| if (stable) { |
| bottomInset = mActionBarHeight; |
| } else { |
| bottomInset = mActionBarBottom.getMeasuredHeight(); |
| } |
| } |
| } |
| |
| // If the window has not requested system UI layout flags, we need to |
| // make sure its content is not being covered by system UI... though it |
| // will still be covered by the action bar if they have requested it to |
| // overlay. |
| mContentInsets.set(mBaseContentInsets); |
| mInnerInsets.set(mBaseInnerInsets); |
| if (!mOverlayMode && !stable) { |
| mContentInsets.top += topInset; |
| mContentInsets.bottom += bottomInset; |
| } else { |
| mInnerInsets.top += topInset; |
| mInnerInsets.bottom += bottomInset; |
| } |
| applyInsets(mContent, mContentInsets, true, true, true, true); |
| |
| if (!mLastInnerInsets.equals(mInnerInsets)) { |
| // If the inner insets have changed, we need to dispatch this down to |
| // the app's fitSystemWindows(). We do this before measuring the content |
| // view to keep the same semantics as the normal fitSystemWindows() call. |
| mLastInnerInsets.set(mInnerInsets); |
| super.fitSystemWindows(mInnerInsets); |
| } |
| |
| measureChildWithMargins(mContent, widthMeasureSpec, 0, heightMeasureSpec, 0); |
| lp = (LayoutParams) mContent.getLayoutParams(); |
| maxWidth = Math.max(maxWidth, |
| mContent.getMeasuredWidth() + lp.leftMargin + lp.rightMargin); |
| maxHeight = Math.max(maxHeight, |
| mContent.getMeasuredHeight() + lp.topMargin + lp.bottomMargin); |
| childState = combineMeasuredStates(childState, mContent.getMeasuredState()); |
| |
| // Account for padding too |
| maxWidth += getPaddingLeft() + getPaddingRight(); |
| maxHeight += getPaddingTop() + getPaddingBottom(); |
| |
| // Check against our minimum height and width |
| maxHeight = Math.max(maxHeight, getSuggestedMinimumHeight()); |
| maxWidth = Math.max(maxWidth, getSuggestedMinimumWidth()); |
| |
| setMeasuredDimension(resolveSizeAndState(maxWidth, widthMeasureSpec, childState), |
| resolveSizeAndState(maxHeight, heightMeasureSpec, |
| childState << MEASURED_HEIGHT_STATE_SHIFT)); |
| } |
| |
| @Override |
| protected void onLayout(boolean changed, int left, int top, int right, int bottom) { |
| final int count = getChildCount(); |
| |
| final int parentLeft = getPaddingLeft(); |
| final int parentRight = right - left - getPaddingRight(); |
| |
| final int parentTop = getPaddingTop(); |
| final int parentBottom = bottom - top - getPaddingBottom(); |
| |
| for (int i = 0; i < count; i++) { |
| final View child = getChildAt(i); |
| if (child.getVisibility() != GONE) { |
| final LayoutParams lp = (LayoutParams) child.getLayoutParams(); |
| |
| final int width = child.getMeasuredWidth(); |
| final int height = child.getMeasuredHeight(); |
| |
| int childLeft = parentLeft + lp.leftMargin; |
| int childTop; |
| if (child == mActionBarBottom) { |
| childTop = parentBottom - height - lp.bottomMargin; |
| } else { |
| childTop = parentTop + lp.topMargin; |
| } |
| |
| child.layout(childLeft, childTop, childLeft + width, childTop + height); |
| } |
| } |
| } |
| |
| @Override |
| public boolean shouldDelayChildPressedState() { |
| return false; |
| } |
| |
| void pullChildren() { |
| if (mContent == null) { |
| mContent = findViewById(com.android.internal.R.id.content); |
| mActionBarTop = findViewById(com.android.internal.R.id.top_action_bar); |
| mContainerView = (ActionBarContainer)findViewById( |
| com.android.internal.R.id.action_bar_container); |
| mActionView = (ActionBarView) findViewById(com.android.internal.R.id.action_bar); |
| mActionBarBottom = findViewById(com.android.internal.R.id.split_action_bar); |
| } |
| } |
| |
| |
| public static class LayoutParams extends MarginLayoutParams { |
| public LayoutParams(Context c, AttributeSet attrs) { |
| super(c, attrs); |
| } |
| |
| public LayoutParams(int width, int height) { |
| super(width, height); |
| } |
| |
| public LayoutParams(ViewGroup.LayoutParams source) { |
| super(source); |
| } |
| |
| public LayoutParams(ViewGroup.MarginLayoutParams source) { |
| super(source); |
| } |
| } |
| } |