A sizes attribute parser

Source/core/css/MediaValues.cpp

 // 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 "config.h"
 #include "core/css/MediaValues.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/page/Page.h"
 #include "core/rendering/RenderObject.h"
 #include "core/rendering/RenderView.h"
 #include "core/rendering/compositing/RenderLayerCompositor.h"
 #include "core/rendering/style/RenderStyle.h"
 #include "platform/PlatformScreen.h"
 
 namespace WebCore {
 
-static int calculateViewportWidth(LocalFrame* frame)
+Document* MediaValues::getExecutingDocument(Document& document)
+{
+    Document* executingDocument = document.importsController() ? document.importsController()->master() : &document;
+    ASSERT(executingDocument);
+    ASSERT(executingDocument->renderer());
+    return executingDocument;
+}
+
+int MediaValues::calculateViewportWidth(LocalFrame* frame) const
 {
     ASSERT(frame && frame->view() && frame->document());
     int viewportWidth = frame->view()->layoutSize(IncludeScrollbars).width();
     return adjustForAbsoluteZoom(viewportWidth, frame->document()->renderView());
 }
 
-static int calculateViewportHeight(LocalFrame* frame)
+int MediaValues::calculateViewportHeight(LocalFrame* frame) const
 {
     ASSERT(frame && frame->view() && frame->document());
     int viewportHeight = frame->view()->layoutSize(IncludeScrollbars).height();
     return adjustForAbsoluteZoom(viewportHeight, frame->document()->renderView());
 }
 
-static int calculateDeviceWidth(LocalFrame* frame)
+int MediaValues::calculateDeviceWidth(LocalFrame* frame) const
 {
     ASSERT(frame && frame->view() && frame->settings() && frame->host());
     int deviceWidth = static_cast<int>(screenRect(frame->view()).width());
     if (frame->settings()->reportScreenSizeInPhysicalPixelsQuirk())
         deviceWidth = lroundf(deviceWidth * frame->host()->deviceScaleFactor());
     return deviceWidth;
 }
 
-static int calculateDeviceHeight(LocalFrame* frame)
+int MediaValues::calculateDeviceHeight(LocalFrame* frame) const
 {
     ASSERT(frame && frame->view() && frame->settings() && frame->host());
     int deviceHeight = static_cast<int>(screenRect(frame->view()).height());
     if (frame->settings()->reportScreenSizeInPhysicalPixelsQuirk())
         deviceHeight = lroundf(deviceHeight * frame->host()->deviceScaleFactor());
     return deviceHeight;
 }
 
-static bool calculateStrictMode(LocalFrame* frame)
+bool MediaValues::calculateStrictMode(LocalFrame* frame) const
 {
     ASSERT(frame && frame->document());
     return !frame->document()->inQuirksMode();
 }
 
-static float calculateDevicePixelRatio(LocalFrame* frame)
+float MediaValues::calculateDevicePixelRatio(LocalFrame* frame) const
 {
     return frame->devicePixelRatio();
 }
 
-static int calculateColorBitsPerComponent(LocalFrame* frame)
+int MediaValues::calculateColorBitsPerComponent(LocalFrame* frame) const
 {
     ASSERT(frame && frame->page() && frame->page()->mainFrame());
     if (screenIsMonochrome(frame->page()->mainFrame()->view()))
         return 0;
     return screenDepthPerComponent(frame->view());
 }
 
-static int calculateMonochromeBitsPerComponent(LocalFrame* frame)
+int MediaValues::calculateMonochromeBitsPerComponent(LocalFrame* frame) const
 {
     ASSERT(frame && frame->page() && frame->page()->mainFrame());
     if (screenIsMonochrome(frame->page()->mainFrame()->view()))
         return screenDepthPerComponent(frame->view());
     return 0;
 }
 
-static int calculateDefaultFontSize(RenderStyle* style)
+int MediaValues::calculateDefaultFontSize(RenderStyle* style) const
 {
     return style->fontDescription().specifiedSize();
 }
 
-static bool calculateScanMediaType(LocalFrame* frame)
+int MediaValues::calculateComputedFontSize(RenderStyle* style) const
+{
+    return style->fontDescription().computedSize();
+}
+
+bool MediaValues::calculateScanMediaType(LocalFrame* frame) const
 {
     ASSERT(frame && frame->view());
     // Scan only applies to 'tv' media.
     return equalIgnoringCase(frame->view()->mediaType(), "tv");
 }
 
-static bool calculateScreenMediaType(LocalFrame* frame)
+bool MediaValues::calculateScreenMediaType(LocalFrame* frame) const
 {
     ASSERT(frame && frame->view());
     return equalIgnoringCase(frame->view()->mediaType(), "screen");
 }
 
-static bool calculatePrintMediaType(LocalFrame* frame)
+bool MediaValues::calculatePrintMediaType(LocalFrame* frame) const
 {
     ASSERT(frame && frame->view());
     return equalIgnoringCase(frame->view()->mediaType(), "print");
 }
 
-static bool calculateThreeDEnabled(LocalFrame* frame)
+bool MediaValues::calculateThreeDEnabled(LocalFrame* frame) const
 {
     ASSERT(frame && frame->contentRenderer() && frame->contentRenderer()->compositor());
     bool threeDEnabled = false;
     if (RenderView* view = frame->contentRenderer())
         threeDEnabled = view->compositor()->canRender3DTransforms();
     return threeDEnabled;
 }
 
-static MediaValues::PointerDeviceType calculateLeastCapablePrimaryPointerDeviceType(LocalFrame* frame)
+MediaValues::PointerDeviceType MediaValues::calculateLeastCapablePrimaryPointerDeviceType(LocalFrame* frame) const
 {
     ASSERT(frame && frame->settings());
     if (frame->settings()->deviceSupportsTouch())
         return MediaValues::TouchPointer;
 
     // FIXME: We should also try to determine if we know we have a mouse.
     // When we do this, we'll also need to differentiate between known not to
     // have mouse or touch screen (NoPointer) and unknown (UnknownPointer).
     // We could also take into account other preferences like accessibility
     // settings to decide which of the available pointers should be considered
     // "primary".
 
     return MediaValues::UnknownPointer;
 }
 
-PassRefPtr<MediaValues> MediaValues::create(MediaValuesMode mode,
-    int viewportWidth,
-    int viewportHeight,
-    int deviceWidth,
-    int deviceHeight,
-    float devicePixelRatio,
-    int colorBitsPerComponent,
-    int monochromeBitsPerComponent,
-    PointerDeviceType pointer,
-    int defaultFontSize,
-    bool threeDEnabled,
-    bool scanMediaType,
-    bool screenMediaType,
-    bool printMediaType,
-    bool strictMode)
-{
-    ASSERT(mode == CachingMode);
-    RefPtr<MediaValues> mediaValues = adoptRef(new MediaValues(0, nullptr, mode));
-    mediaValues->m_viewportWidth = viewportWidth;
-    mediaValues->m_viewportHeight = viewportHeight;
-    mediaValues->m_deviceWidth = deviceWidth;
-    mediaValues->m_deviceHeight = deviceHeight;
-    mediaValues->m_devicePixelRatio = devicePixelRatio;
-    mediaValues->m_colorBitsPerComponent = colorBitsPerComponent;
-    mediaValues->m_monochromeBitsPerComponent = monochromeBitsPerComponent;
-    mediaValues->m_pointer = pointer;
-    mediaValues->m_defaultFontSize = defaultFontSize;
-    mediaValues->m_threeDEnabled = threeDEnabled;
-    mediaValues->m_scanMediaType = scanMediaType;
-    mediaValues->m_screenMediaType = screenMediaType;
-    mediaValues->m_printMediaType = printMediaType;
-    mediaValues->m_strictMode = strictMode;
-
-    return mediaValues;
-}
-
-PassRefPtr<MediaValues> MediaValues::create(LocalFrame* frame, RenderStyle* style, MediaValuesMode mode)
-{
-    ASSERT(frame && style);
-    RefPtr<MediaValues> mediaValues;
-    mediaValues = adoptRef(new MediaValues(frame, style, mode));
-    if (mode == CachingMode) {
-        mediaValues->m_viewportWidth = calculateViewportWidth(frame);
-        mediaValues->m_viewportHeight = calculateViewportHeight(frame),
-        mediaValues->m_deviceWidth = calculateDeviceWidth(frame),
-        mediaValues->m_deviceHeight = calculateDeviceHeight(frame),
-        mediaValues->m_devicePixelRatio = calculateDevicePixelRatio(frame),
-        mediaValues->m_colorBitsPerComponent = calculateColorBitsPerComponent(frame),
-        mediaValues->m_monochromeBitsPerComponent = calculateMonochromeBitsPerComponent(frame),
-        mediaValues->m_pointer = calculateLeastCapablePrimaryPointerDeviceType(frame),
-        mediaValues->m_defaultFontSize = calculateDefaultFontSize(style),
-        mediaValues->m_threeDEnabled = calculateThreeDEnabled(frame),
-        mediaValues->m_scanMediaType = calculateScanMediaType(frame),
-        mediaValues->m_screenMediaType = calculateScreenMediaType(frame),
-        mediaValues->m_printMediaType = calculatePrintMediaType(frame),
-        mediaValues->m_strictMode = calculateStrictMode(frame);
-
-        mediaValues->m_style.clear();
-        mediaValues->m_frame = 0;
-    }
-
-    return mediaValues;
-}
-
-PassRefPtr<MediaValues> MediaValues::create(Document* document, MediaValuesMode mode)
-{
-    ASSERT(document);
-    Document* executingDocument = document->importsController() ? document->importsController()->master() : document;
-    ASSERT(executingDocument->frame());
-    ASSERT(executingDocument->renderer());
-    ASSERT(executingDocument->renderer()->style());
-    LocalFrame* frame = executingDocument->frame();
-    RenderStyle* style = executingDocument->renderer()->style();
-
-    return MediaValues::create(frame, style, mode);
-}
-
-PassRefPtr<MediaValues> MediaValues::copy() const
-{
-    ASSERT(m_mode == CachingMode && !m_style.get() && !m_frame);
-    RefPtr<MediaValues> mediaValues = adoptRef(new MediaValues(0, nullptr, m_mode));
-    mediaValues->m_viewportWidth = m_viewportWidth;
-    mediaValues->m_viewportHeight = m_viewportHeight;
-    mediaValues->m_deviceWidth = m_deviceWidth;
-    mediaValues->m_deviceHeight = m_deviceHeight;
-    mediaValues->m_devicePixelRatio = m_devicePixelRatio;
-    mediaValues->m_colorBitsPerComponent = m_colorBitsPerComponent;
-    mediaValues->m_monochromeBitsPerComponent = m_monochromeBitsPerComponent;
-    mediaValues->m_pointer = m_pointer;
-    mediaValues->m_defaultFontSize = m_defaultFontSize;
-    mediaValues->m_threeDEnabled = m_threeDEnabled;
-    mediaValues->m_scanMediaType = m_scanMediaType;
-    mediaValues->m_screenMediaType = m_screenMediaType;
-    mediaValues->m_printMediaType = m_printMediaType;
-    mediaValues->m_strictMode = m_strictMode;
-
-    return mediaValues;
-}
-
-bool MediaValues::isSafeToSendToAnotherThread() const
-{
-    return (!m_frame && !m_style && m_mode == CachingMode && hasOneRef());
-}
-
-int MediaValues::viewportWidth() const
-{
-    if (m_mode == DynamicMode)
-        return calculateViewportWidth(m_frame);
-    return m_viewportWidth;
-}
-
-int MediaValues::viewportHeight() const
-{
-    if (m_mode == DynamicMode)
-        return calculateViewportHeight(m_frame);
-    return m_viewportHeight;
-}
-
-int MediaValues::deviceWidth() const
-{
-    if (m_mode == DynamicMode)
-        return calculateDeviceWidth(m_frame);
-    return m_deviceWidth;
-}
-
-int MediaValues::deviceHeight() const
-{
-    if (m_mode == DynamicMode)
-        return calculateDeviceHeight(m_frame);
-    return m_deviceHeight;
-}
-
-float MediaValues::devicePixelRatio() const
-{
-    if (m_mode == DynamicMode)
-        return calculateDevicePixelRatio(m_frame);
-    return m_devicePixelRatio;
-}
-
-int MediaValues::colorBitsPerComponent() const
-{
-    if (m_mode == DynamicMode)
-        return calculateColorBitsPerComponent(m_frame);
-    return m_colorBitsPerComponent;
-}
-
-int MediaValues::monochromeBitsPerComponent() const
-{
-    if (m_mode == DynamicMode)
-        return calculateMonochromeBitsPerComponent(m_frame);
-    return m_monochromeBitsPerComponent;
-}
-
-MediaValues::PointerDeviceType MediaValues::pointer() const
-{
-    if (m_mode == DynamicMode)
-        return calculateLeastCapablePrimaryPointerDeviceType(m_frame);
-    return m_pointer;
-}
-
-int MediaValues::defaultFontSize() const
-{
-    if (m_mode == DynamicMode)
-        return calculateDefaultFontSize(m_style.get());
-    return m_defaultFontSize;
-}
-
-bool MediaValues::threeDEnabled() const
-{
-    if (m_mode == DynamicMode)
-        return calculateThreeDEnabled(m_frame);
-    return m_threeDEnabled;
-}
-
-bool MediaValues::scanMediaType() const
-{
-    if (m_mode == DynamicMode)
-        return calculateScanMediaType(m_frame);
-    return m_scanMediaType;
-}
-
-bool MediaValues::screenMediaType() const
-{
-    if (m_mode == DynamicMode)
-        return calculateScreenMediaType(m_frame);
-    return m_screenMediaType;
-}
-
-bool MediaValues::printMediaType() const
-{
-    if (m_mode == DynamicMode)
-        return calculatePrintMediaType(m_frame);
-    return m_printMediaType;
-}
-
-bool MediaValues::strictMode() const
-{
-    if (m_mode == DynamicMode)
-        return calculateStrictMode(m_frame);
-    return m_strictMode;
-}
-
-Document* MediaValues::document() const
-{
-    if (!m_frame)
-        return 0;
-    return m_frame->document();
-}
-
 } // namespace