1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
7 /* representation of a SMIL-animatable CSS property on an element */
9 #include "SMILCSSProperty.h"
13 #include "mozilla/SMILCSSValueType.h"
14 #include "mozilla/SMILValue.h"
15 #include "mozilla/ServoBindings.h"
16 #include "mozilla/StyleAnimationValue.h"
17 #include "mozilla/dom/Element.h"
18 #include "nsCSSProps.h"
19 #include "nsDOMCSSAttrDeclaration.h"
24 SMILCSSProperty::SMILCSSProperty(nsCSSPropertyID aPropID
,
25 dom::Element
* aElement
,
26 const ComputedStyle
* aBaseComputedStyle
)
29 mBaseComputedStyle(aBaseComputedStyle
) {
30 MOZ_ASSERT(IsPropertyAnimatable(mPropID
),
31 "Creating a SMILCSSProperty for a property "
32 "that's not supported for animation");
35 SMILValue
SMILCSSProperty::GetBaseValue() const {
36 // To benefit from Return Value Optimization and avoid copy constructor calls
37 // due to our use of return-by-value, we must return the exact same object
38 // from ALL return points. This function must only return THIS variable:
41 // SPECIAL CASE: (a) Shorthands
43 // (c) No base ComputedStyle
44 if (nsCSSProps::IsShorthand(mPropID
) || mPropID
== eCSSProperty_display
||
45 !mBaseComputedStyle
) {
46 // We can't look up the base (computed-style) value of shorthand
47 // properties because they aren't guaranteed to have a consistent computed
50 // Also, although we can look up the base value of the display property,
51 // doing so involves clearing and resetting the property which can cause
52 // frames to be recreated which we'd like to avoid.
54 // Furthermore, if we don't (yet) have a base ComputedStyle we obviously
55 // can't resolve a base value.
57 // In any case, just return a dummy value (initialized with the right
58 // type, so as not to indicate failure).
59 SMILValue
tmpVal(&SMILCSSValueType::sSingleton
);
60 std::swap(baseValue
, tmpVal
);
64 AnimationValue computedValue
;
65 computedValue
.mServo
=
66 Servo_ComputedValues_ExtractAnimationValue(mBaseComputedStyle
, mPropID
)
68 if (!computedValue
.mServo
) {
72 baseValue
= SMILCSSValueType::ValueFromAnimationValue(mPropID
, mElement
,
77 nsresult
SMILCSSProperty::ValueFromString(
78 const nsAString
& aStr
, const dom::SVGAnimationElement
* aSrcElement
,
79 SMILValue
& aValue
, bool& aPreventCachingOfSandwich
) const {
80 NS_ENSURE_TRUE(IsPropertyAnimatable(mPropID
), NS_ERROR_FAILURE
);
82 SMILCSSValueType::ValueFromString(mPropID
, mElement
, aStr
, aValue
,
83 &aPreventCachingOfSandwich
);
85 if (aValue
.IsNull()) {
86 return NS_ERROR_FAILURE
;
89 // XXX Due to bug 536660 (or at least that seems to be the most likely
90 // culprit), when we have animation setting display:none on a <use> element,
91 // if we DON'T set the property every sample, chaos ensues.
92 if (!aPreventCachingOfSandwich
&& mPropID
== eCSSProperty_display
) {
93 aPreventCachingOfSandwich
= true;
98 nsresult
SMILCSSProperty::SetAnimValue(const SMILValue
& aValue
) {
99 NS_ENSURE_TRUE(IsPropertyAnimatable(mPropID
), NS_ERROR_FAILURE
);
100 return mElement
->SMILOverrideStyle()->SetSMILValue(mPropID
, aValue
);
103 void SMILCSSProperty::ClearAnimValue() {
104 // Put empty string in override style for our property
105 mElement
->SMILOverrideStyle()->SetPropertyValue(mPropID
, ""_ns
, nullptr,
109 // Based on http://www.w3.org/TR/SVG/propidx.html
111 bool SMILCSSProperty::IsPropertyAnimatable(nsCSSPropertyID aPropID
) {
112 // NOTE: Right now, Gecko doesn't recognize the following properties from
113 // the SVG Property Index:
114 // alignment-baseline
117 // glyph-orientation-horizontal
118 // glyph-orientation-vertical
123 case eCSSProperty_clip
:
124 case eCSSProperty_clip_rule
:
125 case eCSSProperty_clip_path
:
126 case eCSSProperty_color
:
127 case eCSSProperty_color_interpolation
:
128 case eCSSProperty_color_interpolation_filters
:
129 case eCSSProperty_cursor
:
130 case eCSSProperty_display
:
131 case eCSSProperty_dominant_baseline
:
132 case eCSSProperty_fill
:
133 case eCSSProperty_fill_opacity
:
134 case eCSSProperty_fill_rule
:
135 case eCSSProperty_filter
:
136 case eCSSProperty_flood_color
:
137 case eCSSProperty_flood_opacity
:
138 case eCSSProperty_font
:
139 case eCSSProperty_font_family
:
140 case eCSSProperty_font_size
:
141 case eCSSProperty_font_size_adjust
:
142 case eCSSProperty_font_stretch
:
143 case eCSSProperty_font_style
:
144 case eCSSProperty_font_variant
:
145 case eCSSProperty_font_weight
:
146 case eCSSProperty_height
:
147 case eCSSProperty_image_rendering
:
148 case eCSSProperty_letter_spacing
:
149 case eCSSProperty_lighting_color
:
150 case eCSSProperty_marker
:
151 case eCSSProperty_marker_end
:
152 case eCSSProperty_marker_mid
:
153 case eCSSProperty_marker_start
:
154 case eCSSProperty_mask
:
155 case eCSSProperty_mask_type
:
156 case eCSSProperty_opacity
:
157 case eCSSProperty_overflow
:
158 case eCSSProperty_pointer_events
:
159 case eCSSProperty_shape_rendering
:
160 case eCSSProperty_stop_color
:
161 case eCSSProperty_stop_opacity
:
162 case eCSSProperty_stroke
:
163 case eCSSProperty_stroke_dasharray
:
164 case eCSSProperty_stroke_dashoffset
:
165 case eCSSProperty_stroke_linecap
:
166 case eCSSProperty_stroke_linejoin
:
167 case eCSSProperty_stroke_miterlimit
:
168 case eCSSProperty_stroke_opacity
:
169 case eCSSProperty_stroke_width
:
170 case eCSSProperty_text_anchor
:
171 case eCSSProperty_text_decoration
:
172 case eCSSProperty_text_decoration_line
:
173 case eCSSProperty_text_rendering
:
174 case eCSSProperty_vector_effect
:
175 case eCSSProperty_width
:
176 case eCSSProperty_visibility
:
177 case eCSSProperty_word_spacing
:
180 // EXPLICITLY NON-ANIMATABLE PROPERTIES:
181 // (Some of these aren't supported at all in Gecko -- I've commented those
182 // ones out. If/when we add support for them, uncomment their line here)
183 // ----------------------------------------------------------------------
184 // case eCSSProperty_enable_background:
185 // case eCSSProperty_glyph_orientation_horizontal:
186 // case eCSSProperty_glyph_orientation_vertical:
187 // case eCSSProperty_writing_mode:
188 case eCSSProperty_direction
:
189 case eCSSProperty_unicode_bidi
:
197 } // namespace mozilla