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gecko/layout/style/nsCSSProps.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Mats Palmgren <matspal@gmail.com>
* Jonathon Jongsma <jonathon.jongsma@collabora.co.uk>, Collabora Ltd.
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* methods for dealing with CSS properties and tables of the keyword
* values they accept
*/
#ifndef nsCSSProps_h___
#define nsCSSProps_h___
#include "nsString.h"
#include "nsChangeHint.h"
#include "nsCSSProperty.h"
#include "nsStyleStruct.h"
#include "nsCSSKeywords.h"
// Flags for the kFlagsTable bitfield (flags_ in nsCSSPropList.h)
// A property that is a *-ltr-source or *-rtl-source property for one of
// the directional pseudo-shorthand properties.
#define CSS_PROPERTY_DIRECTIONAL_SOURCE (1<<0)
#define CSS_PROPERTY_VALUE_LIST_USES_COMMAS (1<<1) /* otherwise spaces */
#define CSS_PROPERTY_APPLIES_TO_FIRST_LETTER (1<<2)
#define CSS_PROPERTY_APPLIES_TO_FIRST_LINE (1<<3)
#define CSS_PROPERTY_APPLIES_TO_FIRST_LETTER_AND_FIRST_LINE \
(CSS_PROPERTY_APPLIES_TO_FIRST_LETTER | CSS_PROPERTY_APPLIES_TO_FIRST_LINE)
// Note that 'background-color' is ignored differently from the other
// properties that have this set, but that's just special-cased.
#define CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED (1<<4)
// A property that needs to have image loads started when a URL value
// for the property is used for an element. This is supported only
// for a few possible value formats: image directly in the value; list
// of images; and with CSS_PROPERTY_IMAGE_IS_IN_ARRAY_0, image in slot
// 0 of an array, or list of such arrays.
#define CSS_PROPERTY_START_IMAGE_LOADS (1<<5)
// Should be set only for properties with START_IMAGE_LOADS. Indicates
// that the property has an array value with a URL/image value at index
// 0 in the array, rather than the URL/image being in the value or value
// list.
#define CSS_PROPERTY_IMAGE_IS_IN_ARRAY_0 (1<<6)
// This is a property for which the computed value should generally be
// reported as the computed value of a property of a different name. In
// particular, the directional box properties (margin-left-value, etc.)
// should be reported as being margin-left, etc. Call
// nsCSSProps::OtherNameFor to get the other property.
#define CSS_PROPERTY_REPORT_OTHER_NAME (1<<7)
// This property allows calc() between lengths and percentages and
// stores such calc() expressions in its style structs (typically in an
// nsStyleCoord, although this is not the case for 'background-position'
// and 'background-size').
#define CSS_PROPERTY_STORES_CALC (1<<8)
// Define what mechanism the CSS parser uses for parsing the property.
// See CSSParserImpl::ParseProperty(nsCSSProperty). Don't use 0 so that
// we can verify that every property sets one of the values.
//
// CSS_PROPERTY_PARSE_FUNCTION must be used for shorthand properties,
// since it's the only mechanism that allows appending values for
// separate properties. Longhand properties that require custom parsing
// functions should prefer using CSS_PROPERTY_PARSE_VALUE (or
// CSS_PROPERTY_PARSE_VALUE_LIST) and
// CSS_PROPERTY_VALUE_PARSER_FUNCTION, though a number of existing
// longhand properties use CSS_PROPERTY_PARSE_FUNCTION instead.
#define CSS_PROPERTY_PARSE_PROPERTY_MASK (7<<9)
#define CSS_PROPERTY_PARSE_INACCESSIBLE (1<<9)
#define CSS_PROPERTY_PARSE_FUNCTION (2<<9)
#define CSS_PROPERTY_PARSE_VALUE (3<<9)
#define CSS_PROPERTY_PARSE_VALUE_LIST (4<<9)
// See CSSParserImpl::ParseSingleValueProperty and comment above
// CSS_PROPERTY_PARSE_FUNCTION (which is different).
#define CSS_PROPERTY_VALUE_PARSER_FUNCTION (1<<12)
MOZ_STATIC_ASSERT((CSS_PROPERTY_PARSE_PROPERTY_MASK &
CSS_PROPERTY_VALUE_PARSER_FUNCTION) == 0,
"didn't leave enough room for the parse property constants");
#define CSS_PROPERTY_VALUE_RESTRICTION_MASK (3<<13)
// The parser (in particular, CSSParserImpl::ParseSingleValueProperty)
// should enforce that the value of this property must be 0 or larger.
#define CSS_PROPERTY_VALUE_NONNEGATIVE (1<<13)
// The parser (in particular, CSSParserImpl::ParseSingleValueProperty)
// should enforce that the value of this property must be 1 or larger.
#define CSS_PROPERTY_VALUE_AT_LEAST_ONE (2<<13)
// NOTE: next free bit is (1<<15)
/**
* Types of animatable values.
*/
enum nsStyleAnimType {
// requires a custom implementation in
// nsStyleAnimation::ExtractComputedValue
eStyleAnimType_Custom,
// nsStyleCoord with animatable values
eStyleAnimType_Coord,
// same as Coord, except for one side of an nsStyleSides
// listed in the same order as the NS_STYLE_* constants
eStyleAnimType_Sides_Top,
eStyleAnimType_Sides_Right,
eStyleAnimType_Sides_Bottom,
eStyleAnimType_Sides_Left,
// similar, but for the *pair* of coord members of an nsStyleCorners
// for the relevant corner
eStyleAnimType_Corner_TopLeft,
eStyleAnimType_Corner_TopRight,
eStyleAnimType_Corner_BottomRight,
eStyleAnimType_Corner_BottomLeft,
// nscoord values
eStyleAnimType_nscoord,
// enumerated values (stored in a PRUint8)
// In order for a property to use this unit, _all_ of its enumerated values
// must be listed in its keyword table, so that any enumerated value can be
// converted into a string via a nsCSSValue of type eCSSUnit_Enumerated.
eStyleAnimType_EnumU8,
// float values
eStyleAnimType_float,
// nscolor values
eStyleAnimType_Color,
// nsStyleSVGPaint values
eStyleAnimType_PaintServer,
// nsRefPtr<nsCSSShadowArray> values
eStyleAnimType_Shadow,
// property not animatable
eStyleAnimType_None
};
class nsCSSProps {
public:
static void AddRefTable(void);
static void ReleaseTable(void);
// Given a property string, return the enum value
static nsCSSProperty LookupProperty(const nsAString& aProperty);
static nsCSSProperty LookupProperty(const nsACString& aProperty);
static inline bool IsShorthand(nsCSSProperty aProperty) {
NS_ABORT_IF_FALSE(0 <= aProperty && aProperty < eCSSProperty_COUNT,
"out of range");
return (aProperty >= eCSSProperty_COUNT_no_shorthands);
}
// Same but for @font-face descriptors
static nsCSSFontDesc LookupFontDesc(const nsAString& aProperty);
static nsCSSFontDesc LookupFontDesc(const nsACString& aProperty);
// Given a property enum, get the string value
static const nsAFlatCString& GetStringValue(nsCSSProperty aProperty);
static const nsAFlatCString& GetStringValue(nsCSSFontDesc aFontDesc);
// Get the property to report the computed value of aProperty as being
// the computed value of. aProperty must have the
// CSS_PROPERTY_REPORT_OTHER_NAME bit set.
static nsCSSProperty OtherNameFor(nsCSSProperty aProperty);
// Given a CSS Property and a Property Enum Value
// Return back a const nsString& representation of the
// value. Return back nullstr if no value is found
static const nsAFlatCString& LookupPropertyValue(nsCSSProperty aProperty, PRInt32 aValue);
// Get a color name for a predefined color value like buttonhighlight or activeborder
// Sets the aStr param to the name of the propertyID
static bool GetColorName(PRInt32 aPropID, nsCString &aStr);
// Find |aKeyword| in |aTable|, if found set |aValue| to its corresponding value.
// If not found, return false and do not set |aValue|.
static bool FindKeyword(nsCSSKeyword aKeyword, const PRInt32 aTable[], PRInt32& aValue);
// Return the first keyword in |aTable| that has the corresponding value |aValue|.
// Return |eCSSKeyword_UNKNOWN| if not found.
static nsCSSKeyword ValueToKeywordEnum(PRInt32 aValue, const PRInt32 aTable[]);
// Ditto but as a string, return "" when not found.
static const nsAFlatCString& ValueToKeyword(PRInt32 aValue, const PRInt32 aTable[]);
static const nsStyleStructID kSIDTable[eCSSProperty_COUNT_no_shorthands];
static const PRInt32* const kKeywordTableTable[eCSSProperty_COUNT_no_shorthands];
static const nsStyleAnimType kAnimTypeTable[eCSSProperty_COUNT_no_shorthands];
static const ptrdiff_t
kStyleStructOffsetTable[eCSSProperty_COUNT_no_shorthands];
private:
static const PRUint32 kFlagsTable[eCSSProperty_COUNT];
public:
static inline bool PropHasFlags(nsCSSProperty aProperty, PRUint32 aFlags)
{
NS_ABORT_IF_FALSE(0 <= aProperty && aProperty < eCSSProperty_COUNT,
"out of range");
return (nsCSSProps::kFlagsTable[aProperty] & aFlags) == aFlags;
}
static inline PRUint32 PropertyParseType(nsCSSProperty aProperty)
{
NS_ABORT_IF_FALSE(0 <= aProperty && aProperty < eCSSProperty_COUNT,
"out of range");
return nsCSSProps::kFlagsTable[aProperty] &
CSS_PROPERTY_PARSE_PROPERTY_MASK;
}
static inline PRUint32 ValueRestrictions(nsCSSProperty aProperty)
{
NS_ABORT_IF_FALSE(0 <= aProperty && aProperty < eCSSProperty_COUNT,
"out of range");
return nsCSSProps::kFlagsTable[aProperty] &
CSS_PROPERTY_VALUE_RESTRICTION_MASK;
}
private:
// Lives in nsCSSParser.cpp for the macros it depends on.
static const PRUint32 kParserVariantTable[eCSSProperty_COUNT_no_shorthands];
public:
static inline PRUint32 ParserVariant(nsCSSProperty aProperty) {
NS_ABORT_IF_FALSE(0 <= aProperty &&
aProperty < eCSSProperty_COUNT_no_shorthands,
"out of range");
return nsCSSProps::kParserVariantTable[aProperty];
}
private:
// A table for shorthand properties. The appropriate index is the
// property ID minus eCSSProperty_COUNT_no_shorthands.
static const nsCSSProperty *const
kSubpropertyTable[eCSSProperty_COUNT - eCSSProperty_COUNT_no_shorthands];
public:
static inline
const nsCSSProperty * SubpropertyEntryFor(nsCSSProperty aProperty) {
NS_ABORT_IF_FALSE(eCSSProperty_COUNT_no_shorthands <= aProperty &&
aProperty < eCSSProperty_COUNT,
"out of range");
return nsCSSProps::kSubpropertyTable[aProperty -
eCSSProperty_COUNT_no_shorthands];
}
// Returns an eCSSProperty_UNKNOWN-terminated array of the shorthand
// properties containing |aProperty|, sorted from those that contain
// the most properties to those that contain the least.
static const nsCSSProperty * ShorthandsContaining(nsCSSProperty aProperty) {
NS_ABORT_IF_FALSE(gShorthandsContainingPool, "uninitialized");
NS_ABORT_IF_FALSE(0 <= aProperty &&
aProperty < eCSSProperty_COUNT_no_shorthands,
"out of range");
return gShorthandsContainingTable[aProperty];
}
private:
// gShorthandsContainingTable is an array of the return values for
// ShorthandsContaining (arrays of nsCSSProperty terminated by
// eCSSProperty_UNKNOWN) pointing into memory in
// gShorthandsContainingPool (which contains all of those arrays in a
// single allocation, and is the one pointer that should be |free|d).
static nsCSSProperty *gShorthandsContainingTable[eCSSProperty_COUNT_no_shorthands];
static nsCSSProperty* gShorthandsContainingPool;
static bool BuildShorthandsContainingTable();
private:
static const size_t gPropertyCountInStruct[nsStyleStructID_Length];
static const size_t gPropertyIndexInStruct[eCSSProperty_COUNT_no_shorthands];
public:
/**
* Return the number of properties that must be cascaded when
* nsRuleNode builds the nsStyle* for aSID.
*/
static size_t PropertyCountInStruct(nsStyleStructID aSID) {
NS_ABORT_IF_FALSE(0 <= aSID && aSID < nsStyleStructID_Length,
"out of range");
return gPropertyCountInStruct[aSID];
}
/**
* Return an index for aProperty that is unique within its SID and in
* the range 0 <= index < PropertyCountInStruct(aSID).
*/
static size_t PropertyIndexInStruct(nsCSSProperty aProperty) {
NS_ABORT_IF_FALSE(0 <= aProperty &&
aProperty < eCSSProperty_COUNT_no_shorthands,
"out of range");
return gPropertyIndexInStruct[aProperty];
}
public:
#define CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(iter_, prop_) \
for (const nsCSSProperty* iter_ = nsCSSProps::SubpropertyEntryFor(prop_); \
*iter_ != eCSSProperty_UNKNOWN; ++iter_)
// Keyword/Enum value tables
static const PRInt32 kAnimationDirectionKTable[];
static const PRInt32 kAnimationFillModeKTable[];
static const PRInt32 kAnimationIterationCountKTable[];
static const PRInt32 kAnimationPlayStateKTable[];
static const PRInt32 kAnimationTimingFunctionKTable[];
static const PRInt32 kAppearanceKTable[];
static const PRInt32 kAzimuthKTable[];
static const PRInt32 kBackfaceVisibilityKTable[];
static const PRInt32 kTransformStyleKTable[];
static const PRInt32 kBackgroundAttachmentKTable[];
static const PRInt32 kBackgroundInlinePolicyKTable[];
static const PRInt32 kBackgroundOriginKTable[];
static const PRInt32 kBackgroundPositionKTable[];
static const PRInt32 kBackgroundRepeatKTable[];
static const PRInt32 kBackgroundRepeatPartKTable[];
static const PRInt32 kBackgroundSizeKTable[];
static const PRInt32 kBorderCollapseKTable[];
static const PRInt32 kBorderColorKTable[];
static const PRInt32 kBorderImageRepeatKTable[];
static const PRInt32 kBorderImageSliceKTable[];
static const PRInt32 kBorderStyleKTable[];
static const PRInt32 kBorderWidthKTable[];
static const PRInt32 kBoxAlignKTable[];
static const PRInt32 kBoxDirectionKTable[];
static const PRInt32 kBoxOrientKTable[];
static const PRInt32 kBoxPackKTable[];
static const PRInt32 kDominantBaselineKTable[];
static const PRInt32 kFillRuleKTable[];
static const PRInt32 kImageRenderingKTable[];
static const PRInt32 kShapeRenderingKTable[];
static const PRInt32 kStrokeLinecapKTable[];
static const PRInt32 kStrokeLinejoinKTable[];
static const PRInt32 kTextAnchorKTable[];
static const PRInt32 kTextRenderingKTable[];
static const PRInt32 kColorInterpolationKTable[];
static const PRInt32 kColumnFillKTable[];
static const PRInt32 kBoxPropSourceKTable[];
static const PRInt32 kBoxShadowTypeKTable[];
static const PRInt32 kBoxSizingKTable[];
static const PRInt32 kCaptionSideKTable[];
static const PRInt32 kClearKTable[];
static const PRInt32 kColorKTable[];
static const PRInt32 kContentKTable[];
static const PRInt32 kCursorKTable[];
static const PRInt32 kDirectionKTable[];
static const PRInt32 kDisplayKTable[];
static const PRInt32 kElevationKTable[];
static const PRInt32 kEmptyCellsKTable[];
static const PRInt32 kFloatKTable[];
static const PRInt32 kFloatEdgeKTable[];
static const PRInt32 kFontKTable[];
static const PRInt32 kFontSizeKTable[];
static const PRInt32 kFontStretchKTable[];
static const PRInt32 kFontStyleKTable[];
static const PRInt32 kFontVariantKTable[];
static const PRInt32 kFontWeightKTable[];
static const PRInt32 kIMEModeKTable[];
static const PRInt32 kLineHeightKTable[];
static const PRInt32 kListStylePositionKTable[];
static const PRInt32 kListStyleKTable[];
static const PRInt32 kOrientKTable[];
static const PRInt32 kOutlineStyleKTable[];
static const PRInt32 kOutlineColorKTable[];
static const PRInt32 kOverflowKTable[];
static const PRInt32 kOverflowSubKTable[];
static const PRInt32 kPageBreakKTable[];
static const PRInt32 kPageBreakInsideKTable[];
static const PRInt32 kPageMarksKTable[];
static const PRInt32 kPageSizeKTable[];
static const PRInt32 kPitchKTable[];
static const PRInt32 kPointerEventsKTable[];
static const PRInt32 kPositionKTable[];
static const PRInt32 kRadialGradientShapeKTable[];
static const PRInt32 kRadialGradientSizeKTable[];
static const PRInt32 kResizeKTable[];
static const PRInt32 kSpeakKTable[];
static const PRInt32 kSpeakHeaderKTable[];
static const PRInt32 kSpeakNumeralKTable[];
static const PRInt32 kSpeakPunctuationKTable[];
static const PRInt32 kSpeechRateKTable[];
static const PRInt32 kStackSizingKTable[];
static const PRInt32 kTableLayoutKTable[];
static const PRInt32 kTextAlignKTable[];
static const PRInt32 kTextAlignLastKTable[];
static const PRInt32 kTextBlinkKTable[];
static const PRInt32 kTextDecorationLineKTable[];
static const PRInt32 kTextDecorationStyleKTable[];
static const PRInt32 kTextOverflowKTable[];
static const PRInt32 kTextTransformKTable[];
static const PRInt32 kTransitionTimingFunctionKTable[];
static const PRInt32 kUnicodeBidiKTable[];
static const PRInt32 kUserFocusKTable[];
static const PRInt32 kUserInputKTable[];
static const PRInt32 kUserModifyKTable[];
static const PRInt32 kUserSelectKTable[];
static const PRInt32 kVerticalAlignKTable[];
static const PRInt32 kVisibilityKTable[];
static const PRInt32 kVolumeKTable[];
static const PRInt32 kWhitespaceKTable[];
static const PRInt32 kWidthKTable[]; // also min-width, max-width
static const PRInt32 kWindowShadowKTable[];
static const PRInt32 kWordwrapKTable[];
static const PRInt32 kHyphensKTable[];
};
#endif /* nsCSSProps_h___ */
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