michael@0: /* vim: set shiftwidth=4 tabstop=8 autoindent cindent expandtab: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /* the features that media queries can test */
michael@0: 
michael@0: #include "nsMediaFeatures.h"
michael@0: #include "nsGkAtoms.h"
michael@0: #include "nsCSSKeywords.h"
michael@0: #include "nsStyleConsts.h"
michael@0: #include "nsPresContext.h"
michael@0: #include "nsCSSValue.h"
michael@0: #ifdef XP_WIN
michael@0: #include "mozilla/LookAndFeel.h"
michael@0: #endif
michael@0: #include "nsCSSRuleProcessor.h"
michael@0: #include "nsDeviceContext.h"
michael@0: #include "nsIDocument.h"
michael@0: 
michael@0: using namespace mozilla;
michael@0: 
michael@0: static const nsCSSProps::KTableValue kOrientationKeywords[] = {
michael@0:   eCSSKeyword_portrait,                 NS_STYLE_ORIENTATION_PORTRAIT,
michael@0:   eCSSKeyword_landscape,                NS_STYLE_ORIENTATION_LANDSCAPE,
michael@0:   eCSSKeyword_UNKNOWN,                  -1
michael@0: };
michael@0: 
michael@0: static const nsCSSProps::KTableValue kScanKeywords[] = {
michael@0:   eCSSKeyword_progressive,              NS_STYLE_SCAN_PROGRESSIVE,
michael@0:   eCSSKeyword_interlace,                NS_STYLE_SCAN_INTERLACE,
michael@0:   eCSSKeyword_UNKNOWN,                  -1
michael@0: };
michael@0: 
michael@0: #ifdef XP_WIN
michael@0: struct WindowsThemeName {
michael@0:     LookAndFeel::WindowsTheme id;
michael@0:     const wchar_t* name;
michael@0: };
michael@0: 
michael@0: // Windows theme identities used in the -moz-windows-theme media query.
michael@0: const WindowsThemeName themeStrings[] = {
michael@0:     { LookAndFeel::eWindowsTheme_Aero,       L"aero" },
michael@0:     { LookAndFeel::eWindowsTheme_AeroLite,   L"aero-lite" },
michael@0:     { LookAndFeel::eWindowsTheme_LunaBlue,   L"luna-blue" },
michael@0:     { LookAndFeel::eWindowsTheme_LunaOlive,  L"luna-olive" },
michael@0:     { LookAndFeel::eWindowsTheme_LunaSilver, L"luna-silver" },
michael@0:     { LookAndFeel::eWindowsTheme_Royale,     L"royale" },
michael@0:     { LookAndFeel::eWindowsTheme_Zune,       L"zune" },
michael@0:     { LookAndFeel::eWindowsTheme_Generic,    L"generic" }
michael@0: };
michael@0: 
michael@0: struct OperatingSystemVersionInfo {
michael@0:     LookAndFeel::OperatingSystemVersion id;
michael@0:     const wchar_t* name;
michael@0: };
michael@0: 
michael@0: // Os version identities used in the -moz-os-version media query.
michael@0: const OperatingSystemVersionInfo osVersionStrings[] = {
michael@0:     { LookAndFeel::eOperatingSystemVersion_WindowsXP,     L"windows-xp" },
michael@0:     { LookAndFeel::eOperatingSystemVersion_WindowsVista,  L"windows-vista" },
michael@0:     { LookAndFeel::eOperatingSystemVersion_Windows7,      L"windows-win7" },
michael@0:     { LookAndFeel::eOperatingSystemVersion_Windows8,      L"windows-win8" },
michael@0: };
michael@0: #endif
michael@0: 
michael@0: // A helper for four features below
michael@0: static nsSize
michael@0: GetSize(nsPresContext* aPresContext)
michael@0: {
michael@0:     nsSize size;
michael@0:     if (aPresContext->IsRootPaginatedDocument())
michael@0:         // We want the page size, including unprintable areas and margins.
michael@0:         size = aPresContext->GetPageSize();
michael@0:     else
michael@0:         size = aPresContext->GetVisibleArea().Size();
michael@0:     return size;
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: GetWidth(nsPresContext* aPresContext, const nsMediaFeature*,
michael@0:          nsCSSValue& aResult)
michael@0: {
michael@0:     nsSize size = GetSize(aPresContext);
michael@0:     float pixelWidth = aPresContext->AppUnitsToFloatCSSPixels(size.width);
michael@0:     aResult.SetFloatValue(pixelWidth, eCSSUnit_Pixel);
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: GetHeight(nsPresContext* aPresContext, const nsMediaFeature*,
michael@0:           nsCSSValue& aResult)
michael@0: {
michael@0:     nsSize size = GetSize(aPresContext);
michael@0:     float pixelHeight = aPresContext->AppUnitsToFloatCSSPixels(size.height);
michael@0:     aResult.SetFloatValue(pixelHeight, eCSSUnit_Pixel);
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: inline static nsDeviceContext*
michael@0: GetDeviceContextFor(nsPresContext* aPresContext)
michael@0: {
michael@0:   // It would be nice to call
michael@0:   // nsLayoutUtils::GetDeviceContextForScreenInfo here, except for two
michael@0:   // things:  (1) it can flush, and flushing is bad here, and (2) it
michael@0:   // doesn't really get us consistency in multi-monitor situations
michael@0:   // *anyway*.
michael@0:   return aPresContext->DeviceContext();
michael@0: }
michael@0: 
michael@0: // A helper for three features below.
michael@0: static nsSize
michael@0: GetDeviceSize(nsPresContext* aPresContext)
michael@0: {
michael@0:     nsSize size;
michael@0: 
michael@0:     if (!aPresContext->IsChrome() || aPresContext->IsDeviceSizePageSize()) {
michael@0:         size = GetSize(aPresContext);
michael@0:     } else if (aPresContext->IsRootPaginatedDocument()) {
michael@0:         // We want the page size, including unprintable areas and margins.
michael@0:         // XXX The spec actually says we want the "page sheet size", but
michael@0:         // how is that different?
michael@0:         size = aPresContext->GetPageSize();
michael@0:     } else {
michael@0:         GetDeviceContextFor(aPresContext)->
michael@0:             GetDeviceSurfaceDimensions(size.width, size.height);
michael@0:     }
michael@0:     return size;
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: GetDeviceWidth(nsPresContext* aPresContext, const nsMediaFeature*,
michael@0:                nsCSSValue& aResult)
michael@0: {
michael@0:     nsSize size = GetDeviceSize(aPresContext);
michael@0:     float pixelWidth = aPresContext->AppUnitsToFloatCSSPixels(size.width);
michael@0:     aResult.SetFloatValue(pixelWidth, eCSSUnit_Pixel);
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: GetDeviceHeight(nsPresContext* aPresContext, const nsMediaFeature*,
michael@0:                 nsCSSValue& aResult)
michael@0: {
michael@0:     nsSize size = GetDeviceSize(aPresContext);
michael@0:     float pixelHeight = aPresContext->AppUnitsToFloatCSSPixels(size.height);
michael@0:     aResult.SetFloatValue(pixelHeight, eCSSUnit_Pixel);
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: GetOrientation(nsPresContext* aPresContext, const nsMediaFeature*,
michael@0:                nsCSSValue& aResult)
michael@0: {
michael@0:     nsSize size = GetSize(aPresContext);
michael@0:     int32_t orientation;
michael@0:     if (size.width > size.height) {
michael@0:         orientation = NS_STYLE_ORIENTATION_LANDSCAPE;
michael@0:     } else {
michael@0:         // Per spec, square viewports should be 'portrait'
michael@0:         orientation = NS_STYLE_ORIENTATION_PORTRAIT;
michael@0:     }
michael@0: 
michael@0:     aResult.SetIntValue(orientation, eCSSUnit_Enumerated);
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: GetDeviceOrientation(nsPresContext* aPresContext, const nsMediaFeature*,
michael@0:                      nsCSSValue& aResult)
michael@0: {
michael@0:     nsSize size = GetDeviceSize(aPresContext);
michael@0:     int32_t orientation;
michael@0:     if (size.width > size.height) {
michael@0:         orientation = NS_STYLE_ORIENTATION_LANDSCAPE;
michael@0:     } else {
michael@0:         // Per spec, square viewports should be 'portrait'
michael@0:         orientation = NS_STYLE_ORIENTATION_PORTRAIT;
michael@0:     }
michael@0: 
michael@0:     aResult.SetIntValue(orientation, eCSSUnit_Enumerated);
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: GetIsResourceDocument(nsPresContext* aPresContext, const nsMediaFeature*,
michael@0:                       nsCSSValue& aResult)
michael@0: {
michael@0:   nsIDocument* doc = aPresContext->Document();
michael@0:   aResult.SetIntValue(doc && doc->IsResourceDoc() ? 1 : 0, eCSSUnit_Integer);
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: // Helper for two features below
michael@0: static nsresult
michael@0: MakeArray(const nsSize& aSize, nsCSSValue& aResult)
michael@0: {
michael@0:     nsRefPtr<nsCSSValue::Array> a = nsCSSValue::Array::Create(2);
michael@0: 
michael@0:     a->Item(0).SetIntValue(aSize.width, eCSSUnit_Integer);
michael@0:     a->Item(1).SetIntValue(aSize.height, eCSSUnit_Integer);
michael@0: 
michael@0:     aResult.SetArrayValue(a, eCSSUnit_Array);
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: GetAspectRatio(nsPresContext* aPresContext, const nsMediaFeature*,
michael@0:                nsCSSValue& aResult)
michael@0: {
michael@0:     return MakeArray(GetSize(aPresContext), aResult);
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: GetDeviceAspectRatio(nsPresContext* aPresContext, const nsMediaFeature*,
michael@0:                      nsCSSValue& aResult)
michael@0: {
michael@0:     return MakeArray(GetDeviceSize(aPresContext), aResult);
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: GetColor(nsPresContext* aPresContext, const nsMediaFeature*,
michael@0:          nsCSSValue& aResult)
michael@0: {
michael@0:     uint32_t depth = 24; // Always assume 24-bit depth for non-chrome callers.
michael@0: 
michael@0:     if (aPresContext->IsChrome()) {
michael@0:         // FIXME:  This implementation is bogus.  nsDeviceContext
michael@0:         // doesn't provide reliable information (should be fixed in bug
michael@0:         // 424386).
michael@0:         // FIXME: On a monochrome device, return 0!
michael@0:         nsDeviceContext *dx = GetDeviceContextFor(aPresContext);
michael@0:         dx->GetDepth(depth);
michael@0:     }
michael@0: 
michael@0:     // The spec says to use bits *per color component*, so divide by 3,
michael@0:     // and round down, since the spec says to use the smallest when the
michael@0:     // color components differ.
michael@0:     depth /= 3;
michael@0:     aResult.SetIntValue(int32_t(depth), eCSSUnit_Integer);
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: GetColorIndex(nsPresContext* aPresContext, const nsMediaFeature*,
michael@0:               nsCSSValue& aResult)
michael@0: {
michael@0:     // We should return zero if the device does not use a color lookup
michael@0:     // table.  Stuart says that our handling of displays with 8-bit
michael@0:     // color is bad enough that we never change the lookup table to
michael@0:     // match what we're trying to display, so perhaps we should always
michael@0:     // return zero.  Given that there isn't any better information
michael@0:     // exposed, we don't have much other choice.
michael@0:     aResult.SetIntValue(0, eCSSUnit_Integer);
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: GetMonochrome(nsPresContext* aPresContext, const nsMediaFeature*,
michael@0:               nsCSSValue& aResult)
michael@0: {
michael@0:     // For color devices we should return 0.
michael@0:     // FIXME: On a monochrome device, return the actual color depth, not
michael@0:     // 0!
michael@0:     aResult.SetIntValue(0, eCSSUnit_Integer);
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: GetResolution(nsPresContext* aPresContext, const nsMediaFeature*,
michael@0:               nsCSSValue& aResult)
michael@0: {
michael@0:     float dpi = 96; // Always return 96 to non-chrome callers.
michael@0: 
michael@0:     if (aPresContext->IsChrome()) {
michael@0:       // Resolution measures device pixels per CSS (inch/cm/pixel).  We
michael@0:       // return it in device pixels per CSS inches.
michael@0:       dpi = float(nsPresContext::AppUnitsPerCSSInch()) /
michael@0:             float(aPresContext->AppUnitsPerDevPixel());
michael@0:     }
michael@0: 
michael@0:     aResult.SetFloatValue(dpi, eCSSUnit_Inch);
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: GetScan(nsPresContext* aPresContext, const nsMediaFeature*,
michael@0:         nsCSSValue& aResult)
michael@0: {
michael@0:     // Since Gecko doesn't support the 'tv' media type, the 'scan'
michael@0:     // feature is never present.
michael@0:     aResult.Reset();
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: GetGrid(nsPresContext* aPresContext, const nsMediaFeature*,
michael@0:         nsCSSValue& aResult)
michael@0: {
michael@0:     // Gecko doesn't support grid devices (e.g., ttys), so the 'grid'
michael@0:     // feature is always 0.
michael@0:     aResult.SetIntValue(0, eCSSUnit_Integer);
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: GetDevicePixelRatio(nsPresContext* aPresContext, const nsMediaFeature*,
michael@0:                     nsCSSValue& aResult)
michael@0: {
michael@0:     if (aPresContext->IsChrome()) {
michael@0:         float ratio = aPresContext->CSSPixelsToDevPixels(1.0f);
michael@0:         aResult.SetFloatValue(ratio, eCSSUnit_Number);
michael@0:     } else {
michael@0:         aResult.SetFloatValue(1.0, eCSSUnit_Number);
michael@0:     }
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: GetSystemMetric(nsPresContext* aPresContext, const nsMediaFeature* aFeature,
michael@0:                 nsCSSValue& aResult)
michael@0: {
michael@0:     aResult.Reset();
michael@0:     if (aPresContext->IsChrome()) {
michael@0:         NS_ABORT_IF_FALSE(aFeature->mValueType == nsMediaFeature::eBoolInteger,
michael@0:                           "unexpected type");
michael@0:         nsIAtom *metricAtom = *aFeature->mData.mMetric;
michael@0:         bool hasMetric = nsCSSRuleProcessor::HasSystemMetric(metricAtom);
michael@0:         aResult.SetIntValue(hasMetric ? 1 : 0, eCSSUnit_Integer);
michael@0:     }
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: GetWindowsTheme(nsPresContext* aPresContext, const nsMediaFeature* aFeature,
michael@0:                 nsCSSValue& aResult)
michael@0: {
michael@0:     aResult.Reset();
michael@0: #ifdef XP_WIN
michael@0:     if (aPresContext->IsChrome()) {
michael@0:         uint8_t windowsThemeId =
michael@0:             nsCSSRuleProcessor::GetWindowsThemeIdentifier();
michael@0: 
michael@0:         // Classic mode should fail to match.
michael@0:         if (windowsThemeId == LookAndFeel::eWindowsTheme_Classic)
michael@0:             return NS_OK;
michael@0: 
michael@0:         // Look up the appropriate theme string
michael@0:         for (size_t i = 0; i < ArrayLength(themeStrings); ++i) {
michael@0:             if (windowsThemeId == themeStrings[i].id) {
michael@0:                 aResult.SetStringValue(nsDependentString(themeStrings[i].name),
michael@0:                                        eCSSUnit_Ident);
michael@0:                 break;
michael@0:             }
michael@0:         }
michael@0:     }
michael@0: #endif
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: GetOperatinSystemVersion(nsPresContext* aPresContext, const nsMediaFeature* aFeature,
michael@0:                          nsCSSValue& aResult)
michael@0: {
michael@0:     aResult.Reset();
michael@0:     if (!aPresContext->IsChrome()) return NS_OK;
michael@0: 
michael@0: #ifdef XP_WIN
michael@0:     int32_t metricResult;
michael@0:     if (NS_SUCCEEDED(
michael@0:           LookAndFeel::GetInt(LookAndFeel::eIntID_OperatingSystemVersionIdentifier,
michael@0:                               &metricResult))) {
michael@0:         for (size_t i = 0; i < ArrayLength(osVersionStrings); ++i) {
michael@0:             if (metricResult == osVersionStrings[i].id) {
michael@0:                 aResult.SetStringValue(nsDependentString(osVersionStrings[i].name),
michael@0:                                        eCSSUnit_Ident);
michael@0:                 break;
michael@0:             }
michael@0:         }
michael@0:     }
michael@0: #endif
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: static nsresult
michael@0: GetIsGlyph(nsPresContext* aPresContext, const nsMediaFeature* aFeature,
michael@0:           nsCSSValue& aResult)
michael@0: {
michael@0:     aResult.SetIntValue(aPresContext->IsGlyph() ? 1 : 0, eCSSUnit_Integer);
michael@0:     return NS_OK;
michael@0: }
michael@0: 
michael@0: /*
michael@0:  * Adding new media features requires (1) adding the new feature to this
michael@0:  * array, with appropriate entries (and potentially any new code needed
michael@0:  * to support new types in these entries and (2) ensuring that either
michael@0:  * nsPresContext::MediaFeatureValuesChanged or
michael@0:  * nsPresContext::PostMediaFeatureValuesChangedEvent is called when the
michael@0:  * value that would be returned by the entry's mGetter changes.
michael@0:  */
michael@0: 
michael@0: /* static */ const nsMediaFeature
michael@0: nsMediaFeatures::features[] = {
michael@0:     {
michael@0:         &nsGkAtoms::width,
michael@0:         nsMediaFeature::eMinMaxAllowed,
michael@0:         nsMediaFeature::eLength,
michael@0:         { nullptr },
michael@0:         GetWidth
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::height,
michael@0:         nsMediaFeature::eMinMaxAllowed,
michael@0:         nsMediaFeature::eLength,
michael@0:         { nullptr },
michael@0:         GetHeight
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::deviceWidth,
michael@0:         nsMediaFeature::eMinMaxAllowed,
michael@0:         nsMediaFeature::eLength,
michael@0:         { nullptr },
michael@0:         GetDeviceWidth
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::deviceHeight,
michael@0:         nsMediaFeature::eMinMaxAllowed,
michael@0:         nsMediaFeature::eLength,
michael@0:         { nullptr },
michael@0:         GetDeviceHeight
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::orientation,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eEnumerated,
michael@0:         { kOrientationKeywords },
michael@0:         GetOrientation
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::aspectRatio,
michael@0:         nsMediaFeature::eMinMaxAllowed,
michael@0:         nsMediaFeature::eIntRatio,
michael@0:         { nullptr },
michael@0:         GetAspectRatio
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::deviceAspectRatio,
michael@0:         nsMediaFeature::eMinMaxAllowed,
michael@0:         nsMediaFeature::eIntRatio,
michael@0:         { nullptr },
michael@0:         GetDeviceAspectRatio
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::color,
michael@0:         nsMediaFeature::eMinMaxAllowed,
michael@0:         nsMediaFeature::eInteger,
michael@0:         { nullptr },
michael@0:         GetColor
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::colorIndex,
michael@0:         nsMediaFeature::eMinMaxAllowed,
michael@0:         nsMediaFeature::eInteger,
michael@0:         { nullptr },
michael@0:         GetColorIndex
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::monochrome,
michael@0:         nsMediaFeature::eMinMaxAllowed,
michael@0:         nsMediaFeature::eInteger,
michael@0:         { nullptr },
michael@0:         GetMonochrome
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::resolution,
michael@0:         nsMediaFeature::eMinMaxAllowed,
michael@0:         nsMediaFeature::eResolution,
michael@0:         { nullptr },
michael@0:         GetResolution
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::scan,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eEnumerated,
michael@0:         { kScanKeywords },
michael@0:         GetScan
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::grid,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eBoolInteger,
michael@0:         { nullptr },
michael@0:         GetGrid
michael@0:     },
michael@0: 
michael@0:     // Mozilla extensions
michael@0:     {
michael@0:         &nsGkAtoms::_moz_device_pixel_ratio,
michael@0:         nsMediaFeature::eMinMaxAllowed,
michael@0:         nsMediaFeature::eFloat,
michael@0:         { nullptr },
michael@0:         GetDevicePixelRatio
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::_moz_device_orientation,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eEnumerated,
michael@0:         { kOrientationKeywords },
michael@0:         GetDeviceOrientation
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::_moz_is_resource_document,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eBoolInteger,
michael@0:         { nullptr },
michael@0:         GetIsResourceDocument
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::_moz_color_picker_available,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eBoolInteger,
michael@0:         { &nsGkAtoms::color_picker_available },
michael@0:         GetSystemMetric
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::_moz_scrollbar_start_backward,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eBoolInteger,
michael@0:         { &nsGkAtoms::scrollbar_start_backward },
michael@0:         GetSystemMetric
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::_moz_scrollbar_start_forward,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eBoolInteger,
michael@0:         { &nsGkAtoms::scrollbar_start_forward },
michael@0:         GetSystemMetric
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::_moz_scrollbar_end_backward,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eBoolInteger,
michael@0:         { &nsGkAtoms::scrollbar_end_backward },
michael@0:         GetSystemMetric
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::_moz_scrollbar_end_forward,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eBoolInteger,
michael@0:         { &nsGkAtoms::scrollbar_end_forward },
michael@0:         GetSystemMetric
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::_moz_scrollbar_thumb_proportional,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eBoolInteger,
michael@0:         { &nsGkAtoms::scrollbar_thumb_proportional },
michael@0:         GetSystemMetric
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::_moz_images_in_menus,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eBoolInteger,
michael@0:         { &nsGkAtoms::images_in_menus },
michael@0:         GetSystemMetric
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::_moz_images_in_buttons,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eBoolInteger,
michael@0:         { &nsGkAtoms::images_in_buttons },
michael@0:         GetSystemMetric
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::_moz_overlay_scrollbars,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eBoolInteger,
michael@0:         { &nsGkAtoms::overlay_scrollbars },
michael@0:         GetSystemMetric
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::_moz_windows_default_theme,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eBoolInteger,
michael@0:         { &nsGkAtoms::windows_default_theme },
michael@0:         GetSystemMetric
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::_moz_mac_graphite_theme,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eBoolInteger,
michael@0:         { &nsGkAtoms::mac_graphite_theme },
michael@0:         GetSystemMetric
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::_moz_mac_lion_theme,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eBoolInteger,
michael@0:         { &nsGkAtoms::mac_lion_theme },
michael@0:         GetSystemMetric
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::_moz_windows_compositor,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eBoolInteger,
michael@0:         { &nsGkAtoms::windows_compositor },
michael@0:         GetSystemMetric
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::_moz_windows_classic,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eBoolInteger,
michael@0:         { &nsGkAtoms::windows_classic },
michael@0:         GetSystemMetric
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::_moz_windows_glass,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eBoolInteger,
michael@0:         { &nsGkAtoms::windows_glass },
michael@0:         GetSystemMetric
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::_moz_touch_enabled,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eBoolInteger,
michael@0:         { &nsGkAtoms::touch_enabled },
michael@0:         GetSystemMetric
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::_moz_menubar_drag,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eBoolInteger,
michael@0:         { &nsGkAtoms::menubar_drag },
michael@0:         GetSystemMetric
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::_moz_windows_theme,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eIdent,
michael@0:         { nullptr },
michael@0:         GetWindowsTheme
michael@0:     },
michael@0:     {
michael@0:         &nsGkAtoms::_moz_os_version,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eIdent,
michael@0:         { nullptr },
michael@0:         GetOperatinSystemVersion
michael@0:     },
michael@0: 
michael@0:     {
michael@0:         &nsGkAtoms::_moz_swipe_animation_enabled,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eBoolInteger,
michael@0:         { &nsGkAtoms::swipe_animation_enabled },
michael@0:         GetSystemMetric
michael@0:     },
michael@0: 
michael@0:     {
michael@0:         &nsGkAtoms::_moz_physical_home_button,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eBoolInteger,
michael@0:         { &nsGkAtoms::physical_home_button },
michael@0:         GetSystemMetric
michael@0:     },
michael@0: 
michael@0:     // Internal -moz-is-glyph media feature: applies only inside SVG glyphs.
michael@0:     // Internal because it is really only useful in the user agent anyway
michael@0:     //  and therefore not worth standardizing.
michael@0:     {
michael@0:         &nsGkAtoms::_moz_is_glyph,
michael@0:         nsMediaFeature::eMinMaxNotAllowed,
michael@0:         nsMediaFeature::eBoolInteger,
michael@0:         { nullptr },
michael@0:         GetIsGlyph
michael@0:     },
michael@0:     // Null-mName terminator:
michael@0:     {
michael@0:         nullptr,
michael@0:         nsMediaFeature::eMinMaxAllowed,
michael@0:         nsMediaFeature::eInteger,
michael@0:         { nullptr },
michael@0:         nullptr
michael@0:     },
michael@0: };