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// Copyright (c) 2012 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.
#include "content/browser/accessibility/accessibility_tree_formatter.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/string_util.h"
#include "base/stringprintf.h"
#include "base/strings/string_number_conversions.h"
#include "base/utf_string_conversions.h"
#include "content/browser/accessibility/browser_accessibility_manager.h"
#include "content/port/browser/render_widget_host_view_port.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/web_contents.h"
namespace content {
namespace {
const int kIndentSpaces = 4;
const char* kSkipString = "@NO_DUMP";
const char* kChildrenDictAttr = "children";
}
AccessibilityTreeFormatter::AccessibilityTreeFormatter(
BrowserAccessibility* root)
: root_(root) {
Initialize();
}
// static
AccessibilityTreeFormatter* AccessibilityTreeFormatter::Create(
RenderViewHost* rvh) {
RenderWidgetHostViewPort* host_view = static_cast<RenderWidgetHostViewPort*>(
WebContents::FromRenderViewHost(rvh)->GetRenderWidgetHostView());
BrowserAccessibilityManager* manager =
host_view->GetBrowserAccessibilityManager();
if (!manager)
return NULL;
BrowserAccessibility* root = manager->GetRoot();
return new AccessibilityTreeFormatter(root);
}
AccessibilityTreeFormatter::~AccessibilityTreeFormatter() {
}
scoped_ptr<DictionaryValue>
AccessibilityTreeFormatter::BuildAccessibilityTree() {
scoped_ptr<DictionaryValue> dict(new DictionaryValue);
RecursiveBuildAccessibilityTree(*root_, dict.get());
return dict.Pass();
}
void AccessibilityTreeFormatter::FormatAccessibilityTree(
string16* contents) {
scoped_ptr<DictionaryValue> dict = BuildAccessibilityTree();
RecursiveFormatAccessibilityTree(*(dict.get()), contents);
}
void AccessibilityTreeFormatter::RecursiveBuildAccessibilityTree(
const BrowserAccessibility& node, DictionaryValue* dict) {
AddProperties(node, dict);
ListValue* children = new ListValue;
dict->Set(kChildrenDictAttr, children);
for (size_t i = 0; i < node.children().size(); ++i) {
BrowserAccessibility* child_node = node.children()[i];
DictionaryValue* child_dict = new DictionaryValue;
children->Append(child_dict);
RecursiveBuildAccessibilityTree(*child_node, child_dict);
}
}
void AccessibilityTreeFormatter::RecursiveFormatAccessibilityTree(
const DictionaryValue& dict, string16* contents, int depth) {
string16 line = ToString(dict, string16(depth * kIndentSpaces, ' '));
if (line.find(ASCIIToUTF16(kSkipString)) != string16::npos)
return;
*contents += line;
const ListValue* children;
dict.GetList(kChildrenDictAttr, &children);
const DictionaryValue* child_dict;
for (size_t i = 0; i < children->GetSize(); i++) {
children->GetDictionary(i, &child_dict);
RecursiveFormatAccessibilityTree(*child_dict, contents, depth + 1);
}
}
#if (!defined(OS_WIN) && !defined(OS_MACOSX))
void AccessibilityTreeFormatter::AddProperties(const BrowserAccessibility& node,
DictionaryValue* dict) {
dict->SetInteger("id", node.renderer_id());
}
string16 AccessibilityTreeFormatter::ToString(const DictionaryValue& node,
const string16& indent) {
int id_value;
node.GetInteger("id", &id_value);
return indent + base::IntToString16(id_value) +
ASCIIToUTF16("\n");
}
void AccessibilityTreeFormatter::Initialize() {}
// static
const base::FilePath::StringType
AccessibilityTreeFormatter::GetActualFileSuffix() {
return base::FilePath::StringType();
}
// static
const base::FilePath::StringType
AccessibilityTreeFormatter::GetExpectedFileSuffix() {
return base::FilePath::StringType();
}
// static
const std::string AccessibilityTreeFormatter::GetAllowEmptyString() {
return std::string();
}
// static
const std::string AccessibilityTreeFormatter::GetAllowString() {
return std::string();
}
// static
const std::string AccessibilityTreeFormatter::GetDenyString() {
return std::string();
}
#endif
void AccessibilityTreeFormatter::SetFilters(
const std::vector<Filter>& filters) {
filters_ = filters;
}
bool AccessibilityTreeFormatter::MatchesFilters(
const string16& text, bool default_result) const {
std::vector<Filter>::const_iterator iter = filters_.begin();
bool allow = default_result;
for (iter = filters_.begin(); iter != filters_.end(); ++iter) {
if (MatchPattern(text, iter->match_str)) {
if (iter->type == Filter::ALLOW_EMPTY)
allow = true;
else if (iter->type == Filter::ALLOW)
allow = (!MatchPattern(text, UTF8ToUTF16("*=''")));
else
allow = false;
}
}
return allow;
}
string16 AccessibilityTreeFormatter::FormatCoordinates(
const char* name, const char* x_name, const char* y_name,
const DictionaryValue& value) {
int x, y;
value.GetInteger(x_name, &x);
value.GetInteger(y_name, &y);
std::string xy_str(base::StringPrintf("%s=(%d, %d)", name, x, y));
return UTF8ToUTF16(xy_str);
}
void AccessibilityTreeFormatter::WriteAttribute(
bool include_by_default, const std::string& attr, string16* line) {
WriteAttribute(include_by_default, UTF8ToUTF16(attr), line);
}
void AccessibilityTreeFormatter::WriteAttribute(
bool include_by_default, const string16& attr, string16* line) {
if (attr.empty())
return;
if (!MatchesFilters(attr, include_by_default))
return;
if (!line->empty())
*line += ASCIIToUTF16(" ");
*line += attr;
}
} // namespace content
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