third_party/WebKit/Source/core/layout/TracedLayoutObject.cpp

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "config.h"
   6 #include "core/layout/TracedLayoutObject.h"
   7
   8 #include "core/layout/LayoutInline.h"
   9 #include "core/layout/LayoutTableCell.h"
  10 #include "core/layout/LayoutText.h"
  11 #include "core/layout/LayoutView.h"
  12 #include "platform/JSONValues.h"
  13
  14 namespace blink {
  15
  16 PassRefPtr<TraceEvent::ConvertableToTraceFormat> TracedLayoutObject::create(const LayoutView& view, bool traceGeometry)
  17 {
  18     return adoptRef(new TracedLayoutObject(view, traceGeometry));
  19 }
  20
  21 String TracedLayoutObject::asTraceFormat() const
  22 {
  23     StringBuilder builder;
  24     RefPtr<JSONObject> json(toJSON());
  25     json->writeJSON(&builder);
  26     return builder.toString();
  27 }
  28
  29 TracedLayoutObject::TracedLayoutObject(const LayoutObject& object, bool traceGeometry)
  30     : m_address((unsigned long) &object)
  31     , m_isAnonymous(object.isAnonymous())
  32     , m_isPositioned(object.isOutOfFlowPositioned())
  33     , m_isRelPositioned(object.isRelPositioned())
  34     , m_isStickyPositioned(object.isStickyPositioned())
  35     , m_isFloating(object.isFloating())
  36     , m_selfNeeds(object.selfNeedsLayout())
  37     , m_positionedMovement(object.needsPositionedMovementLayout())
  38     , m_childNeeds(object.normalChildNeedsLayout())
  39     , m_posChildNeeds(object.posChildNeedsLayout())
  40     , m_isTableCell(object.isTableCell())
  41     , m_name(String(object.name()).isolatedCopy())
  42     , m_absRect(traceGeometry ? object.absoluteBoundingBoxRect() : IntRect())
  43 {
  44     if (Node* node = object.node()) {
  45         m_tag = String(node->nodeName()).isolatedCopy();
  46         if (node->isElementNode()) {
  47             Element& element = toElement(*node);
  48             if (element.hasID())
  49                 m_id = String(element.getIdAttribute()).isolatedCopy();
  50             if (element.hasClass()) {
  51                 for (size_t i = 0; i < element.classNames().size(); ++i) {
  52                     m_classNames.append(
  53                         String(element.classNames()[i]).isolatedCopy());
  54                 }
  55             }
  56         }
  57     }
  58
  59     // FIXME: When the fixmes in LayoutTreeAsText::writeLayoutObject() are
  60     // fixed, deduplicate it with this.
  61     if (traceGeometry) {
  62         if (object.isText()) {
  63             m_rect = LayoutRect(toLayoutText(object).linesBoundingBox());
  64         } else if (object.isLayoutInline()) {
  65             m_rect = LayoutRect(toLayoutInline(object).linesBoundingBox());
  66         } else if (object.isBox()) {
  67             m_rect = toLayoutBox(&object)->frameRect();
  68         }
  69     }
  70
  71     if (m_isTableCell) {
  72         const LayoutTableCell& c = toLayoutTableCell(object);
  73         if (c.row() && c.row()->rowIndexWasSet() && c.hasCol()
  74             && (!c.row()->section() || !c.row()->section()->needsCellRecalc())) {
  75             m_row = c.rowIndex();
  76             m_col = c.col();
  77             m_rowSpan = c.rowSpan();
  78             m_colSpan = c.colSpan();
  79         }
  80     }
  81
  82     for (LayoutObject* child = object.slowFirstChild(); child; child = child->nextSibling()) {
  83         m_children.append(adoptRef(new TracedLayoutObject(*child, traceGeometry)));
  84     }
  85 }
  86
  87 PassRefPtr<JSONObject> TracedLayoutObject::toJSON() const
  88 {
  89     RefPtr<JSONObject> json(JSONObject::create());
  90     json->setNumber("address", m_address);
  91     json->setString("name", m_name);
  92     if (!m_tag.isEmpty())
  93         json->setString("tag", m_tag);
  94     if (!m_id.isEmpty())
  95         json->setString("htmlId", m_id);
  96     if (m_classNames.size()) {
  97         RefPtr<JSONArray> classNames(JSONArray::create());
  98         for (const auto& className : m_classNames) {
  99             classNames->pushString(className);
 100         }
 101         json->setArray("classNames", classNames);
 102     }
 103     json->setNumber("absX", m_absRect.x());
 104     json->setNumber("absY", m_absRect.y());
 105     json->setNumber("relX", m_rect.x());
 106     json->setNumber("relY", m_rect.y());
 107     json->setNumber("width", m_rect.width());
 108     json->setNumber("height", m_rect.height());
 109     if (m_isPositioned)
 110         json->setBoolean("positioned", m_isPositioned);
 111     if (m_selfNeeds)
 112         json->setBoolean("selfNeeds", m_selfNeeds);
 113     if (m_positionedMovement)
 114         json->setBoolean("positionedMovement", m_positionedMovement);
 115     if (m_childNeeds)
 116         json->setBoolean("childNeeds", m_childNeeds);
 117     if (m_posChildNeeds)
 118         json->setBoolean("posChildNeeds", m_posChildNeeds);
 119     if (m_isTableCell) {
 120         json->setNumber("row", m_row);
 121         json->setNumber("col", m_col);
 122         if (m_rowSpan != 1)
 123             json->setNumber("rowSpan", m_rowSpan);
 124         if (m_colSpan != 1)
 125             json->setNumber("colSpan", m_colSpan);
 126     }
 127     if (m_isAnonymous)
 128         json->setBoolean("anonymous", m_isAnonymous);
 129     if (m_isRelPositioned)
 130         json->setBoolean("relativePositioned", m_isRelPositioned);
 131     if (m_isStickyPositioned)
 132         json->setBoolean("stickyPositioned", m_isStickyPositioned);
 133     if (m_isFloating)
 134         json->setBoolean("float", m_isFloating);
 135     if (m_children.size()) {
 136         RefPtr<JSONArray> children(JSONArray::create());
 137         for (const auto& child : m_children) {
 138             children->pushObject(child->toJSON());
 139         }
 140         json->setArray("children", children);
 141     }
 142     return json.release();
 143 }
 144
 145 } // namespace blink