Bug笔记

1. drawPicture ANR由               => 169215 161813(PM) 161646(news.baidu)

2.__pthread_cond_timedwai   =>  167845

3. 新浪微博编辑横屏分屏        =>   151337

Bug#166995

Bug#163868

4.0.3 选择相关的实现

 #00  pc 000b517c  /system/lib/libskia.so  #01  pc 000b540c  /system/lib/libskia.so  #02  pc 000a9de8  /system/lib/libskia.so (FT_Get_Next_Char+68)  #03  pc 000532d4  /system/lib/libskia.so (SkScalerContext_FreeType::generateGlyphToChar(unsigned short)+76)  #04  pc 00093e28  /system/lib/libskia.so (SkScalerContext::glyphIDToChar(unsigned short)+96)  #05  pc 00086d04  /system/lib/libskia.so (SkPaint::glyphsToUnichars(unsigned short const*, int, int*) const+48)  #06  pc 002a2673  /system/lib/libwebcore.so  #07  pc 002a387d  /system/lib/libwebcore.so  #08  pc 00075b30  /system/lib/libskia.so (SkBounder::doIRectGlyph(SkIRect const&, int, int, SkGlyph const&)+264)  #09  pc 00076bd0  /system/lib/libskia.so  #10  pc 00076a98  /system/lib/libskia.so (SkDraw::drawPosText(char const*, unsigned int, float const*, float, int, SkPaint const&) const+1276)  #11  pc 0007156c  /system/lib/libskia.so (SkCanvas::drawPosTextH(void const*, unsigned int, float const*, float, SkPaint const&)+720)  #12  pc 002a1f47  /system/lib/libwebcore.so  #13  pc 0008fd98  /system/lib/libskia.so (SkPicturePlayback::draw(SkCanvas&)+1536)  #14  pc 0006d9dc  /system/lib/libskia.so (SkCanvas::drawPicture(SkPicture&)+40)  #15  pc 002a3e2b  /system/lib/libwebcore.so buildSelection() SelectText.cpp  #16  pc 002a3fa7  /system/lib/libwebcore.so wordSelection() SelectText.cpp  #17  pc 002a4345  /system/lib/libwebcore.so wordSelection() WebView.cpp  #18  pc 002a67d7  /system/lib/libwebcore.so nativeWordSelection() WebView.cpp  #19  pc 00023670  /system/lib/libdvm.so (dvmPlatformInvoke+112)  at android.webkit.WebView.nativeWordSelection(Native Method)  at android.webkit.WebView.setUpSelect(WebView.java:5516)  at android.webkit.WebView.selectText(WebView.java:4442)  at android.webkit.WebView.selectText(WebView.java:4435)  at android.webkit.WebView.performLongClick(WebView.java:4420)  at android.webkit.WebView$PrivateHandler.handleMessage(WebView.java:8468)  at android.os.Handler.dispatchMessage(Handler.java:99)  at android.os.Looper.loop(Looper.java:148)  at android.app.ActivityThread.main(ActivityThread.java:4477)  at java.lang.reflect.Method.invokeNative(Native Method)  at java.lang.reflect.Method.invoke(Method.java:511)  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:824)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:591)  at dalvik.system.NativeStart.main(Native Method)

  #00  pc 000a9990  /system/lib/libskia.so (FT_Get_Next_Char+72)

  #01  pc 00053224  /system/lib/libskia.so (SkScalerContext_FreeType::generateGlyphToChar(unsigned short)+76)

  #02  pc 00093a4c  /system/lib/libskia.so (SkScalerContext::glyphIDToChar(unsigned short)+96)

  #03  pc 00086a9c  /system/lib/libskia.so (SkPaint::glyphsToUnichars(unsigned short const*, int, int*) const+48)

  #04  pc 0029e73d  /system/lib/libwebcore.so( RingCheck::onIRectGlyph CachedRoot.cpp:844)

  #05  pc 0007595c  /system/lib/libskia.so (SkBounder::doIRectGlyph(SkIRect const&, int, int, SkGlyph const&)+264)

  #06  pc 000769fc  /system/lib/libskia.so

  #07  pc 000768c4  /system/lib/libskia.so (SkDraw::drawPosText(char const*, unsigned int, float const*, float, int, SkPaint const&) const+1276)

  #08  pc 000713e4  /system/lib/libskia.so (SkCanvas::drawPosTextH(void const*, unsigned int, float const*, float, SkPaint const&)+720)

  #09  pc 0029efa1 /system/lib/libwebcore.so (BoundsCanvas::drawPosText CachedRoot.cpp:202)

  #10  pc 0029f08f  /system/lib/libwebcore.so (RingCanvas::drawPosTextH CachedRoot.cpp:998)

  #11  pc 0008f9f8  /system/lib/libskia.so (SkPicturePlayback::draw(SkCanvas&)+1536)

  #12  pc 0006d894  /system/lib/libskia.so (SkCanvas::drawPicture(SkPicture&)+40)

  #13  pc 002a0111  /system/lib/libwebcore.so(BoundsCanvas::drawPicture CachedRoot.cpp:231)

  #14  pc 0029d7cb  /system/lib/libwebcore.so(CachedFrame::checkRings CachedFrame.cpp:140)

  #15  pc 0029de19 /system/lib/libwebcore.so(CachedNode::fixUpCursorRects CachedNode.cpp:111)

  #16  pc 0029ffe7  /system/lib/libwebcore.so(CachedRoot::maskIfHidden CachedRoot.cpp:1521)

  #17  pc 0029cde3  /system/lib/libwebcore.so(CachedFrame::findBestAt CachedFrame.cpp:407)

  #18  pc 0029faa7  /system/lib/libwebcore.so(CachedRoot::findAt CachedRoot.cpp:1171)

  #19  pc 002a5e11  /system/lib/libwebcore.so(WebView::fixCursor WebView.cpp:643)

  #20  pc 002a8471  /system/lib/libwebcore.so(nativeCursorPosition WebView.cpp:1801)

//BuilderCheck

#0  BuilderCheck () SelectText.cpp:825

#1  MultilineBuilder () SelectText.cpp:970

#2  buildSelection () SelectText.cpp:1274

#3  android::SelectText::getSelectionRegion () SelectText.cpp:1500

#4  android::WebView::getTextSelectionRegion () WebView.cpp:1488

#5  nativeGetTextSelectionRegion () WebView.cpp:1951

//EdgeCheck::onIRectGlyph

#0  android::SelectText::EdgeCheck::onIRectGlyph () SelectText.cpp:696

#1  SkBounder::doIRectGlyph () SkDraw.cpp:2472

#2  D1G_Bounder () SkDraw.cpp:1458

#3  SkDraw::drawPosText () SkDraw.cpp:1812

#4  SkCanvas::drawPosTextH () SkCanvas.cpp:1420

#5  android::TextCanvas::drawPosTextH () SelectText.cpp:1250

#6  SkPicturePlayback::draw () SkPicturePlayback.cpp:713

#7  SkCanvas::drawPicture () SkCanvas.cpp:1621

#8  android::SelectText::findEdge () SelectText.cpp:1718

#9  android::SelectText::findLeft () SelectText.cpp:1754

#10 android::SelectText::wordSelection () SelectText.cpp:2031

#11 android::WebView::wordSelection () WebView.cpp:1210

#12 nativeWordSelection () WebView.cpp:2488

#13 setUpSelect() WebView.java

 

选择基本上可以分为以下几个步骤：

1.用户长安WebView界面

2.默认是选中一行或一个单词，所以首先会计算选择区域

3.获取选中的文本区域或选中的字符都是通过重载不同的SkBounder和SkCanvas来实现的

 

selectText()   WebView.java

{

    //首先设置Select环境，setUpSelect的第一个参数是表示是否选择一个单词，进入

    //setUpSelect会先判断选择一个单词是否成功，如果不成功就返回false了。

    if (!setUpSelect(true, x, y)) {

        return false;

    }

    //设置为扩展选择模式

    nativeSetExtendSelection();

}

setUpSelect()  WebView.java

 

选择区域的绘制是在WebView.java drawTextSelectionHandles()中完成的，但选择区域是从WebKit中获取的：

getSelectionRegion()

 

4.1.2 选择相关的实现

//调用createSelectText

void WebViewCore::initEditField(Node* node)

{

    SelectText* selectText = createSelectText(focusedFrame()->selection()->selection());

}

//EditorClientAndroid::respondToChangedSelection() 

1.创建SelectText时机

void WebViewCore::updateTextSelection()

{

    SelectText* selectText = createSelectText(selection);

}

2.createSelectText中根据focusedFrame()->selection()->selection()来构建选择区域和文本

SelectText* WebViewCore::createSelectText(const VisibleSelection& selection)

{

    bool isCaret = selection.isCaret();

    RefPtr<Range> range = selection.firstRange();

    Node* startContainer = range->startContainer();

    Node* endContainer = range->endContainer();

 

    if (!startContainer || !endContainer)

        return 0;

    if (!isCaret && startContainer == endContainer

            && range->startOffset() == range->endOffset())

        return 0;

 

    IntPoint frameOffset = convertGlobalContentToFrameContent(IntPoint());

    SelectText* selectTextContainer = new SelectText();

    if (isCaret) {

        setSelectionCaretInfo(selectTextContainer, selection.start(), frameOffset,

                SelectText::LeftHandle, 0, selection.affinity());

        setSelectionCaretInfo(selectTextContainer, selection.start(), frameOffset,

                SelectText::RightHandle, 0, selection.affinity());

    } else {

        bool ltr = isLtr(selection.start());

        Position left = ltr ? selection.start() : selection.end();

        Position right = ltr ? selection.end() : selection.start();

        int leftOffset = isLtr(left) ? 0 : -1;

        int rightOffset = isLtr(right) ? 0 : -1;

        setSelectionCaretInfo(selectTextContainer, left, frameOffset,

                SelectText::LeftHandle, leftOffset, selection.affinity());

        setSelectionCaretInfo(selectTextContainer, right, frameOffset,

                SelectText::RightHandle, rightOffset, selection.affinity());

 

        Node* stopNode = range->pastLastNode();

        for (Node* node = range->firstNode(); node != stopNode; node = node->traverseNextNode()) {

            RenderObject* r = node->renderer();

            if (!r || !r->isText() || r->style()->visibility() != VISIBLE)

                continue;

            RenderText* renderText = toRenderText(r);

            int startOffset = node == startContainer ? range->startOffset() : 0;

            int endOffset = node == endContainer ? range->endOffset() : numeric_limits<int>::max();

            LayerAndroid* layer = 0;

            int layerId = platformLayerIdFromNode(node, &layer);

            Vector<IntRect> rects;

            renderText->absoluteRectsForRange(rects, startOffset, endOffset, true);

            selectTextContainer->addHighlightRegion(layer, rects, frameOffset);

        }

    }

    selectTextContainer->setText(range->text());

    return selectTextContainer;

}

 

3.使用前面两步构建的选择区域

static jobject nativeGetSelection(JNIEnv *env, jobject obj)

{

    WebView* view = GET_NATIVE_VIEW(env, obj);

    String selection = view->getSelection();

    return wtfStringToJstring(env, selection);

}

 

4.绘制选择区域

void RegionLayerDrawExtra::draw(SkCanvas* canvas, LayerAndroid* layer)

{

    SkRegion* region = getHighlightRegionsForLayer(layer);

    if (!region || region->isEmpty())

        return;

    SkRegion::Iterator rgnIter(*region);

    SkPaint paint;

    paint.setColor(m_highlightColor.rgb());

    while (!rgnIter.done()) {

        const SkIRect& rect = rgnIter.rect();

        canvas->drawIRect(rect, paint);

        rgnIter.next();

    }

}

 

void RegionLayerDrawExtra::drawGL(GLExtras* glExtras, const LayerAndroid* layer)

{

    SkRegion* region = getHighlightRegionsForLayer(layer);

    if (!region || region->isEmpty())

        return;

    const TransformationMatrix* transform = layer ? layer->drawTransform() : 0;

    glExtras->drawRegion(*region, true, false, transform, m_highlightColor);

}

 

//////////

void WebViewCore::selectText(int startX, int startY, int endX, int endY)

{

    SelectionController* sc = focusedFrame()->selection();

    IntPoint startPoint = convertGlobalContentToFrameContent(IntPoint(startX, startY));

    VisiblePosition startPosition(visiblePositionForContentPoint(startPoint));

    IntPoint endPoint = convertGlobalContentToFrameContent(IntPoint(endX, endY));

    VisiblePosition endPosition(visiblePositionForContentPoint(endPoint));

 

    if (startPosition.isNull() || endPosition.isNull())

        return;

 

    // Ensure startPosition is before endPosition

    if (comparePositions(startPosition, endPosition) > 0)

        swap(startPosition, endPosition);

 

    if (sc->isContentEditable()) {

        startPosition = sc->selection().visibleStart().honorEditableBoundaryAtOrAfter(startPosition);

        endPosition = sc->selection().visibleEnd().honorEditableBoundaryAtOrBefore(endPosition);

        if (startPosition.isNull() || endPosition.isNull()) {

            return;

        }

    }

 

    // Ensure startPosition is not at end of block

    if (startPosition != endPosition && isEndOfBlock(startPosition)) {

        VisiblePosition nextStartPosition(startPosition.next());

        if (!nextStartPosition.isNull())

            startPosition = nextStartPosition;

    }

    // Ensure endPosition is not at start of block

    if (startPosition != endPosition && isStartOfBlock(endPosition)) {

        VisiblePosition prevEndPosition(endPosition.previous());

        if (!prevEndPosition.isNull())

            endPosition = prevEndPosition;

    }

 

    Position start = startPosition.deepEquivalent();

    Position end = endPosition.deepEquivalent();

    start = trimSelectionPosition(start, end);

    end = trimSelectionPosition(end, start);

    VisibleSelection selection(start, end);

    // Only allow changes between caret positions or to text selection.

    bool selectChangeAllowed = (!selection.isCaret() || sc->isCaret());

    if (selectChangeAllowed && sc->shouldChangeSelection(selection))

        sc->setSelection(selection);

}

 #0  SkScalerContext_FreeType::generateGlyphToChar() SkFontHost_FreeType.cpp:842

#1  SkScalerContext::glyphIDToChar() SkScalerContext.cpp:273

#2  SkPaint::glyphsToUnichars() SkPaint.cpp:510

#3  android::RingCheck::onIRectGlyph () CachedRoot.cpp:844

#4  SkBounder::doIRectGlyph () SkDraw.cpp:2472

#5  D1G_Bounder () SkDraw.cpp:1458

#6  SkDraw::drawPosText () SkDraw.cpp:1812

#7  SkCanvas::drawPosTextH () SkCanvas.cpp:1420

#8  android::BoundsCanvas::drawPosTextH () CachedRoot.cpp:202

#9  android::RingCanvas::drawPosTextH () CachedRoot.cpp:998

#10 SkPicturePlayback::draw () SkPicturePlayback.cpp:658

#11 SkCanvas::drawPicture () SkCanvas.cpp:1621

#12 android::BoundsCanvas::drawPicture () CachedRoot.cpp:231

#13 android::CachedRoot::maskIfHidden () CachedRoot.cpp:1495

#14 android::CachedFrame::findBestAt () CachedFrame.cpp:407

#15 android::CachedRoot::findAt () CachedRoot.cpp:1171

#16 android::WebView::findAt () WebView.cpp:948

#17 android::WebView::selectBestAt () WebView.cpp:967

#18 nativeSelectBestAt ()