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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"
#import <Cocoa/Cocoa.h>
#include "base/basictypes.h"
#include "base/files/file_path.h"
#include "base/json/json_writer.h"
#include "base/strings/stringprintf.h"
#include "base/strings/sys_string_conversions.h"
#include "base/strings/utf_string_conversions.h"
#include "content/browser/accessibility/browser_accessibility_cocoa.h"
#include "content/browser/accessibility/browser_accessibility_mac.h"
#include "content/browser/accessibility/browser_accessibility_manager.h"
using base::StringPrintf;
using base::SysNSStringToUTF8;
using base::SysNSStringToUTF16;
using std::string;
namespace content {
namespace {
const char* kPositionDictAttr = "position";
const char* kXCoordDictAttr = "x";
const char* kYCoordDictAttr = "y";
const char* kSizeDictAttr = "size";
const char* kWidthDictAttr = "width";
const char* kHeightDictAttr = "height";
const char* kRangeLocDictAttr = "loc";
const char* kRangeLenDictAttr = "len";
scoped_ptr<base::DictionaryValue> PopulatePosition(
const BrowserAccessibility& node) {
scoped_ptr<base::DictionaryValue> position(new base::DictionaryValue);
// The NSAccessibility position of an object is in global coordinates and
// based on the lower-left corner of the object. To make this easier and less
// confusing, convert it to local window coordinates using the top-left
// corner when dumping the position.
BrowserAccessibility* root = node.manager()->GetRoot();
BrowserAccessibilityCocoa* cocoa_root = root->ToBrowserAccessibilityCocoa();
NSPoint root_position = [[cocoa_root position] pointValue];
NSSize root_size = [[cocoa_root size] sizeValue];
int root_top = -static_cast<int>(root_position.y + root_size.height);
int root_left = static_cast<int>(root_position.x);
BrowserAccessibilityCocoa* cocoa_node =
const_cast<BrowserAccessibility*>(&node)->ToBrowserAccessibilityCocoa();
NSPoint node_position = [[cocoa_node position] pointValue];
NSSize node_size = [[cocoa_node size] sizeValue];
position->SetInteger(kXCoordDictAttr,
static_cast<int>(node_position.x - root_left));
position->SetInteger(kYCoordDictAttr,
static_cast<int>(-node_position.y - node_size.height - root_top));
return position.Pass();
}
scoped_ptr<base::DictionaryValue>
PopulateSize(const BrowserAccessibilityCocoa* cocoa_node) {
scoped_ptr<base::DictionaryValue> size(new base::DictionaryValue);
NSSize node_size = [[cocoa_node size] sizeValue];
size->SetInteger(kHeightDictAttr, static_cast<int>(node_size.height));
size->SetInteger(kWidthDictAttr, static_cast<int>(node_size.width));
return size.Pass();
}
scoped_ptr<base::DictionaryValue> PopulateRange(NSRange range) {
scoped_ptr<base::DictionaryValue> rangeDict(new base::DictionaryValue);
rangeDict->SetInteger(kRangeLocDictAttr, static_cast<int>(range.location));
rangeDict->SetInteger(kRangeLenDictAttr, static_cast<int>(range.length));
return rangeDict.Pass();
}
// Returns true if |value| is an NSValue containing a NSRange.
bool IsRangeValue(id value) {
if (![value isKindOfClass:[NSValue class]])
return false;
return 0 == strcmp([value objCType], @encode(NSRange));
}
NSArray* BuildAllAttributesArray() {
NSArray* array = [NSArray arrayWithObjects:
NSAccessibilityRoleDescriptionAttribute,
NSAccessibilityTitleAttribute,
NSAccessibilityValueAttribute,
NSAccessibilityMinValueAttribute,
NSAccessibilityMaxValueAttribute,
NSAccessibilityValueDescriptionAttribute,
NSAccessibilityDescriptionAttribute,
NSAccessibilityHelpAttribute,
@"AXInvalid",
NSAccessibilityDisclosingAttribute,
NSAccessibilityDisclosureLevelAttribute,
@"AXAccessKey",
@"AXARIAAtomic",
@"AXARIABusy",
@"AXARIALive",
@"AXARIARelevant",
NSAccessibilityColumnIndexRangeAttribute,
NSAccessibilityEnabledAttribute,
NSAccessibilityFocusedAttribute,
NSAccessibilityIndexAttribute,
@"AXLoaded",
@"AXLoadingProcess",
NSAccessibilityNumberOfCharactersAttribute,
NSAccessibilityOrientationAttribute,
@"AXRequired",
NSAccessibilityRowIndexRangeAttribute,
NSAccessibilityURLAttribute,
NSAccessibilityVisibleCharacterRangeAttribute,
@"AXVisited",
nil];
return [array retain];
}
} // namespace
void AccessibilityTreeFormatter::Initialize() {
}
void AccessibilityTreeFormatter::AddProperties(const BrowserAccessibility& node,
base::DictionaryValue* dict) {
BrowserAccessibilityCocoa* cocoa_node =
const_cast<BrowserAccessibility*>(&node)->ToBrowserAccessibilityCocoa();
NSArray* supportedAttributes = [cocoa_node accessibilityAttributeNames];
string role = SysNSStringToUTF8(
[cocoa_node accessibilityAttributeValue:NSAccessibilityRoleAttribute]);
dict->SetString(SysNSStringToUTF8(NSAccessibilityRoleAttribute), role);
NSString* subrole =
[cocoa_node accessibilityAttributeValue:NSAccessibilitySubroleAttribute];
if (subrole != nil) {
dict->SetString(SysNSStringToUTF8(NSAccessibilitySubroleAttribute),
SysNSStringToUTF8(subrole));
}
CR_DEFINE_STATIC_LOCAL(NSArray*, all_attributes, (BuildAllAttributesArray()));
for (NSString* requestedAttribute in all_attributes) {
if (![supportedAttributes containsObject:requestedAttribute]) {
continue;
}
id value = [cocoa_node accessibilityAttributeValue:requestedAttribute];
if (IsRangeValue(value)) {
dict->Set(
SysNSStringToUTF8(requestedAttribute),
PopulateRange([value rangeValue]).release());
} else if (value != nil) {
dict->SetString(
SysNSStringToUTF8(requestedAttribute),
SysNSStringToUTF16([NSString stringWithFormat:@"%@", value]));
}
}
dict->Set(kPositionDictAttr, PopulatePosition(node).release());
dict->Set(kSizeDictAttr, PopulateSize(cocoa_node).release());
}
base::string16 AccessibilityTreeFormatter::ToString(
const base::DictionaryValue& dict,
const base::string16& indent) {
base::string16 line;
NSArray* defaultAttributes =
[NSArray arrayWithObjects:NSAccessibilityTitleAttribute,
NSAccessibilityValueAttribute,
nil];
string s_value;
dict.GetString(SysNSStringToUTF8(NSAccessibilityRoleAttribute), &s_value);
WriteAttribute(true, base::UTF8ToUTF16(s_value), &line);
string subroleAttribute = SysNSStringToUTF8(NSAccessibilitySubroleAttribute);
if (dict.GetString(subroleAttribute, &s_value)) {
WriteAttribute(false,
StringPrintf("%s=%s",
subroleAttribute.c_str(), s_value.c_str()),
&line);
}
CR_DEFINE_STATIC_LOCAL(NSArray*, all_attributes, (BuildAllAttributesArray()));
for (NSString* requestedAttribute in all_attributes) {
string requestedAttributeUTF8 = SysNSStringToUTF8(requestedAttribute);
const base::DictionaryValue* d_value;
if (dict.GetDictionary(requestedAttributeUTF8, &d_value)) {
std::string json_value;
base::JSONWriter::Write(d_value, &json_value);
WriteAttribute(
[defaultAttributes containsObject:requestedAttribute],
StringPrintf("%s=%s",
requestedAttributeUTF8.c_str(),
json_value.c_str()),
&line);
}
if (!dict.GetString(requestedAttributeUTF8, &s_value))
continue;
WriteAttribute([defaultAttributes containsObject:requestedAttribute],
StringPrintf("%s='%s'",
requestedAttributeUTF8.c_str(),
s_value.c_str()),
&line);
}
const base::DictionaryValue* d_value = NULL;
if (dict.GetDictionary(kPositionDictAttr, &d_value)) {
WriteAttribute(false,
FormatCoordinates(kPositionDictAttr,
kXCoordDictAttr, kYCoordDictAttr,
*d_value),
&line);
}
if (dict.GetDictionary(kSizeDictAttr, &d_value)) {
WriteAttribute(false,
FormatCoordinates(kSizeDictAttr,
kWidthDictAttr, kHeightDictAttr, *d_value),
&line);
}
return indent + line + base::ASCIIToUTF16("\n");
}
// static
const base::FilePath::StringType
AccessibilityTreeFormatter::GetActualFileSuffix() {
return FILE_PATH_LITERAL("-actual-mac.txt");
}
// static
const base::FilePath::StringType
AccessibilityTreeFormatter::GetExpectedFileSuffix() {
return FILE_PATH_LITERAL("-expected-mac.txt");
}
// static
const string AccessibilityTreeFormatter::GetAllowEmptyString() {
return "@MAC-ALLOW-EMPTY:";
}
// static
const string AccessibilityTreeFormatter::GetAllowString() {
return "@MAC-ALLOW:";
}
// static
const string AccessibilityTreeFormatter::GetDenyString() {
return "@MAC-DENY:";
}
} // namespace content
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