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// Copyright 2014 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 "core/css/MediaValues.h"
#include "core/css/CSSHelper.h"
#include "core/css/MediaValuesCached.h"
#include "core/css/MediaValuesDynamic.h"
#include "core/dom/Document.h"
#include "core/dom/Element.h"
#include "core/frame/FrameHost.h"
#include "core/frame/FrameView.h"
#include "core/frame/LocalFrame.h"
#include "core/frame/Settings.h"
#include "core/html/imports/HTMLImportsController.h"
#include "core/layout/LayoutObject.h"
#include "core/layout/api/LayoutViewItem.h"
#include "core/layout/compositing/PaintLayerCompositor.h"
#include "core/page/ChromeClient.h"
#include "core/page/Page.h"
#include "core/style/ComputedStyle.h"
#include "public/platform/WebScreenInfo.h"
namespace blink {
PassRefPtrWillBeRawPtr<MediaValues> MediaValues::createDynamicIfFrameExists(LocalFrame* frame)
{
if (frame)
return MediaValuesDynamic::create(frame);
return MediaValuesCached::create();
}
double MediaValues::calculateViewportWidth(LocalFrame* frame)
{
ASSERT(frame && frame->view() && frame->document());
int viewportWidth = frame->view()->layoutSize(IncludeScrollbars).width();
return adjustDoubleForAbsoluteZoom(viewportWidth, *frame->document()->layoutView());
}
double MediaValues::calculateViewportHeight(LocalFrame* frame)
{
ASSERT(frame && frame->view() && frame->document());
int viewportHeight = frame->view()->layoutSize(IncludeScrollbars).height();
return adjustDoubleForAbsoluteZoom(viewportHeight, *frame->document()->layoutView());
}
int MediaValues::calculateDeviceWidth(LocalFrame* frame)
{
ASSERT(frame && frame->view() && frame->settings() && frame->host());
int deviceWidth = frame->host()->chromeClient().screenInfo().rect.width;
if (frame->settings()->reportScreenSizeInPhysicalPixelsQuirk())
deviceWidth = lroundf(deviceWidth * frame->host()->deviceScaleFactor());
return deviceWidth;
}
int MediaValues::calculateDeviceHeight(LocalFrame* frame)
{
ASSERT(frame && frame->view() && frame->settings() && frame->host());
int deviceHeight = frame->host()->chromeClient().screenInfo().rect.height;
if (frame->settings()->reportScreenSizeInPhysicalPixelsQuirk())
deviceHeight = lroundf(deviceHeight * frame->host()->deviceScaleFactor());
return deviceHeight;
}
bool MediaValues::calculateStrictMode(LocalFrame* frame)
{
ASSERT(frame && frame->document());
return !frame->document()->inQuirksMode();
}
float MediaValues::calculateDevicePixelRatio(LocalFrame* frame)
{
return frame->devicePixelRatio();
}
int MediaValues::calculateColorBitsPerComponent(LocalFrame* frame)
{
ASSERT(frame && frame->page() && frame->page()->mainFrame());
if (!frame->page()->mainFrame()->isLocalFrame()
|| frame->host()->chromeClient().screenInfo().isMonochrome)
return 0;
return frame->host()->chromeClient().screenInfo().depthPerComponent;
}
int MediaValues::calculateMonochromeBitsPerComponent(LocalFrame* frame)
{
ASSERT(frame && frame->page() && frame->page()->mainFrame());
if (!frame->page()->mainFrame()->isLocalFrame()
|| !frame->host()->chromeClient().screenInfo().isMonochrome)
return 0;
return frame->host()->chromeClient().screenInfo().depthPerComponent;
}
int MediaValues::calculateDefaultFontSize(LocalFrame* frame)
{
return frame->host()->settings().defaultFontSize();
}
const String MediaValues::calculateMediaType(LocalFrame* frame)
{
ASSERT(frame);
if (!frame->view())
return emptyAtom;
return frame->view()->mediaType();
}
WebDisplayMode MediaValues::calculateDisplayMode(LocalFrame* frame)
{
ASSERT(frame);
WebDisplayMode mode = frame->host()->settings().displayModeOverride();
if (mode != WebDisplayModeUndefined)
return mode;
if (!frame->view())
return WebDisplayModeBrowser;
return frame->view()->displayMode();
}
bool MediaValues::calculateThreeDEnabled(LocalFrame* frame)
{
ASSERT(frame && frame->contentLayoutObject() && LayoutViewItem(frame->contentLayoutObject()).compositor());
bool threeDEnabled = false;
if (LayoutViewItem view = LayoutViewItem(frame->contentLayoutObject()))
threeDEnabled = view.compositor()->hasAcceleratedCompositing();
return threeDEnabled;
}
PointerType MediaValues::calculatePrimaryPointerType(LocalFrame* frame)
{
ASSERT(frame && frame->settings());
return frame->settings()->primaryPointerType();
}
int MediaValues::calculateAvailablePointerTypes(LocalFrame* frame)
{
ASSERT(frame && frame->settings());
return frame->settings()->availablePointerTypes();
}
HoverType MediaValues::calculatePrimaryHoverType(LocalFrame* frame)
{
ASSERT(frame && frame->settings());
return frame->settings()->primaryHoverType();
}
int MediaValues::calculateAvailableHoverTypes(LocalFrame* frame)
{
ASSERT(frame && frame->settings());
return frame->settings()->availableHoverTypes();
}
bool MediaValues::computeLengthImpl(double value, CSSPrimitiveValue::UnitType type, unsigned defaultFontSize, double viewportWidth, double viewportHeight, double& result)
{
// The logic in this function is duplicated from CSSToLengthConversionData::zoomedComputedPixels()
// because MediaValues::computeLength() needs nearly identical logic, but we haven't found a way to make
// CSSToLengthConversionData::zoomedComputedPixels() more generic (to solve both cases) without hurting performance.
// FIXME - Unite the logic here with CSSToLengthConversionData in a performant way.
double factor = 0;
switch (type) {
case CSSPrimitiveValue::UnitType::Ems:
case CSSPrimitiveValue::UnitType::Rems:
factor = defaultFontSize;
break;
case CSSPrimitiveValue::UnitType::Pixels:
case CSSPrimitiveValue::UnitType::UserUnits:
factor = 1;
break;
case CSSPrimitiveValue::UnitType::Exs:
// FIXME: We have a bug right now where the zoom will be applied twice to EX units.
// FIXME: We don't seem to be able to cache fontMetrics related values.
// Trying to access them is triggering some sort of microtask. Serving the spec's default instead.
factor = defaultFontSize / 2.0;
break;
case CSSPrimitiveValue::UnitType::Chs:
// FIXME: We don't seem to be able to cache fontMetrics related values.
// Trying to access them is triggering some sort of microtask. Serving the (future) spec default instead.
factor = defaultFontSize / 2.0;
break;
case CSSPrimitiveValue::UnitType::ViewportWidth:
factor = viewportWidth / 100.0;
break;
case CSSPrimitiveValue::UnitType::ViewportHeight:
factor = viewportHeight / 100.0;
break;
case CSSPrimitiveValue::UnitType::ViewportMin:
factor = std::min(viewportWidth, viewportHeight) / 100.0;
break;
case CSSPrimitiveValue::UnitType::ViewportMax:
factor = std::max(viewportWidth, viewportHeight) / 100.0;
break;
case CSSPrimitiveValue::UnitType::Centimeters:
factor = cssPixelsPerCentimeter;
break;
case CSSPrimitiveValue::UnitType::Millimeters:
factor = cssPixelsPerMillimeter;
break;
case CSSPrimitiveValue::UnitType::Inches:
factor = cssPixelsPerInch;
break;
case CSSPrimitiveValue::UnitType::Points:
factor = cssPixelsPerPoint;
break;
case CSSPrimitiveValue::UnitType::Picas:
factor = cssPixelsPerPica;
break;
default:
return false;
}
ASSERT(factor >= 0);
result = value * factor;
return true;
}
LocalFrame* MediaValues::frameFrom(Document& document)
{
Document* executingDocument = document.importsController() ? document.importsController()->master() : &document;
ASSERT(executingDocument);
return executingDocument->frame();
}
} // namespace blink
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