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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/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";
}
AccessibilityTreeFormatter::AccessibilityTreeFormatter(
BrowserAccessibility* node)
: node_(node) {
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() {
}
void AccessibilityTreeFormatter::FormatAccessibilityTree(
string16* contents) {
RecursiveFormatAccessibilityTree(node_, contents, 0);
}
void AccessibilityTreeFormatter::RecursiveFormatAccessibilityTree(
BrowserAccessibility* node, string16* contents, int indent) {
scoped_ptr<char[]> prefix(new char[indent + 1]);
for (int i = 0; i < indent; ++i)
prefix[i] = ' ';
prefix[indent] = '\0';
string16 line = ToString(node, prefix.get());
if (line.find(ASCIIToUTF16(kSkipString)) != string16::npos)
return;
*contents += line;
for (size_t i = 0; i < node->children().size(); ++i) {
RecursiveFormatAccessibilityTree(node->children()[i], contents,
indent + kIndentSpaces);
}
}
#if (!defined(OS_WIN) && !defined(OS_MACOSX))
string16 AccessibilityTreeFormatter::ToString(BrowserAccessibility* node,
char* prefix) {
return UTF8ToUTF16(prefix) + base::IntToString16(node->renderer_id()) +
ASCIIToUTF16("\n");
}
void AccessibilityTreeFormatter::Initialize() {}
// static
const base::FilePath::StringType
AccessibilityTreeFormatter::GetActualFileSuffix() {
return FILE_PATH_LITERAL(std::string());
}
// static
const base::FilePath::StringType
AccessibilityTreeFormatter::GetExpectedFileSuffix() {
return FILE_PATH_LITERAL(std::string());
}
// 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;
}
void AccessibilityTreeFormatter::StartLine() {
line_.clear();
}
void AccessibilityTreeFormatter::Add(
bool include_by_default, const string16& attr) {
if (attr.empty())
return;
if (!MatchesFilters(attr, include_by_default))
return;
if (!line_.empty())
line_ += ASCIIToUTF16(" ");
line_ += attr;
}
string16 AccessibilityTreeFormatter::FinishLine() {
return line_;
}
} // namespace content
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