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// Copyright (c) 2013 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 "ash/display/display_layout.h"
#include "ash/display/display_pref_util.h"
#include "base/json/json_value_converter.h"
#include "base/logging.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_piece.h"
#include "base/strings/stringprintf.h"
#include "base/values.h"
#include "ui/gfx/display.h"
namespace ash {
namespace {
// The maximum value for 'offset' in DisplayLayout in case of outliers. Need
// to change this value in case to support even larger displays.
const int kMaxValidOffset = 10000;
// Persistent key names
const char kPositionKey[] = "position";
const char kOffsetKey[] = "offset";
const char kMirroredKey[] = "mirrored";
const char kPrimaryIdKey[] = "primary-id";
typedef std::map<DisplayLayout::Position, std::string> PositionToStringMap;
const PositionToStringMap* GetPositionToStringMap() {
static const PositionToStringMap* map = CreateToStringMap(
DisplayLayout::TOP, "top",
DisplayLayout::BOTTOM, "bottom",
DisplayLayout::RIGHT, "right",
DisplayLayout::LEFT, "left");
return map;
}
bool GetPositionFromString(const base::StringPiece& position,
DisplayLayout::Position* field) {
if (ReverseFind(GetPositionToStringMap(), position, field))
return true;
LOG(ERROR) << "Invalid position value:" << position;
return false;
}
std::string GetStringFromPosition(DisplayLayout::Position position) {
const PositionToStringMap* map = GetPositionToStringMap();
PositionToStringMap::const_iterator iter = map->find(position);
return iter != map->end() ? iter->second : std::string("unknown");
}
bool GetDisplayIdFromString(const base::StringPiece& position, int64* field) {
return base::StringToInt64(position, field);
}
} // namespace
////////////////////////////////////////////////////////////////////////////////
// DisplayLayout
// static
DisplayLayout DisplayLayout::FromInts(int position, int offsets) {
return DisplayLayout(static_cast<Position>(position), offsets);
}
DisplayLayout::DisplayLayout()
: position(RIGHT),
offset(0),
mirrored(false),
primary_id(gfx::Display::kInvalidDisplayID) {
}
DisplayLayout::DisplayLayout(DisplayLayout::Position position, int offset)
: position(position),
offset(offset),
mirrored(false),
primary_id(gfx::Display::kInvalidDisplayID) {
DCHECK_LE(TOP, position);
DCHECK_GE(LEFT, position);
// Set the default value to |position| in case position is invalid. DCHECKs
// above doesn't stop in Release builds.
if (TOP > position || LEFT < position)
this->position = RIGHT;
DCHECK_GE(kMaxValidOffset, abs(offset));
}
DisplayLayout DisplayLayout::Invert() const {
Position inverted_position = RIGHT;
switch (position) {
case TOP:
inverted_position = BOTTOM;
break;
case BOTTOM:
inverted_position = TOP;
break;
case RIGHT:
inverted_position = LEFT;
break;
case LEFT:
inverted_position = RIGHT;
break;
}
DisplayLayout ret = DisplayLayout(inverted_position, -offset);
ret.primary_id = primary_id;
return ret;
}
// static
bool DisplayLayout::ConvertFromValue(const base::Value& value,
DisplayLayout* layout) {
base::JSONValueConverter<DisplayLayout> converter;
return converter.Convert(value, layout);
}
// static
bool DisplayLayout::ConvertToValue(const DisplayLayout& layout,
base::Value* value) {
base::DictionaryValue* dict_value = NULL;
if (!value->GetAsDictionary(&dict_value) || dict_value == NULL)
return false;
const std::string position_str = GetStringFromPosition(layout.position);
dict_value->SetString(kPositionKey, position_str);
dict_value->SetInteger(kOffsetKey, layout.offset);
dict_value->SetBoolean(kMirroredKey, layout.mirrored);
dict_value->SetString(kPrimaryIdKey, base::Int64ToString(layout.primary_id));
return true;
}
std::string DisplayLayout::ToString() const {
const std::string position_str = GetStringFromPosition(position);
return base::StringPrintf(
"%s, %d%s",
position_str.c_str(), offset, mirrored ? ", mirrored" : "");
}
// static
void DisplayLayout::RegisterJSONConverter(
base::JSONValueConverter<DisplayLayout>* converter) {
converter->RegisterCustomField<Position>(
kPositionKey, &DisplayLayout::position, &GetPositionFromString);
converter->RegisterIntField(kOffsetKey, &DisplayLayout::offset);
converter->RegisterBoolField(kMirroredKey, &DisplayLayout::mirrored);
converter->RegisterCustomField<int64>(
kPrimaryIdKey, &DisplayLayout::primary_id, &GetDisplayIdFromString);
}
} // namespace ash
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