moebius#90: CSS - implement text-justify property

layout/style/nsCSSKeywordList.h

@@ -238,6 +238,7 @@ CSS_KEY(disc, disc)
 CSS_KEY(disclosure-closed, disclosure_closed)
 CSS_KEY(disclosure-open, disclosure_open)
 CSS_KEY(discretionary-ligatures, discretionary_ligatures)
+CSS_KEY(distribute, distribute)
 CSS_KEY(dot, dot)
 CSS_KEY(dotted, dotted)
 CSS_KEY(double, double)
@@ -333,7 +334,8 @@ CSS_KEY(inline-start, inline_start)
 CSS_KEY(inline-table, inline_table)
 CSS_KEY(inset, inset)
 CSS_KEY(inside, inside)
-// CSS_KEY(inter-character, inter_character) // TODO see bug 1055672
+CSS_KEY(inter-character, inter_character)
+CSS_KEY(inter-word, inter_word)
 CSS_KEY(interpolatematrix, interpolatematrix)
 CSS_KEY(intersect, intersect)
 CSS_KEY(isolate, isolate)

layout/style/nsCSSPropList.h

@@ -4027,6 +4027,17 @@ CSS_PROP_TEXT(
     nullptr,
     offsetof(nsStyleText, mTextIndent),
     eStyleAnimType_Coord)
+CSS_PROP_TEXT(
+    text-justify,
+    text_justify,
+    TextJustify,
+    CSS_PROPERTY_PARSE_VALUE |
+        CSS_PROPERTY_APPLIES_TO_PLACEHOLDER,
+    "layout.css.text-justify.enabled",
+    VARIANT_HK,
+    kTextJustifyKTable,
+    CSS_PROP_NO_OFFSET,
+    eStyleAnimType_Discrete)
 CSS_PROP_VISIBILITY(
     text-orientation,
     text_orientation,

layout/style/nsCSSProps.cpp

@@ -2035,6 +2035,17 @@ KTableEntry nsCSSProps::kTextAlignLastKTable[] = {
   { eCSSKeyword_UNKNOWN, -1 }
 };
 
+const KTableEntry nsCSSProps::kTextJustifyKTable[] = {
+  { eCSSKeyword_none, StyleTextJustify::None },
+  { eCSSKeyword_auto, StyleTextJustify::Auto },
+  { eCSSKeyword_inter_word, StyleTextJustify::InterWord },
+  { eCSSKeyword_inter_character, StyleTextJustify::InterCharacter },
+  // For legacy reasons, UAs must also support the keyword "distribute" with
+  // the exact same meaning and behavior as "inter-character".
+  { eCSSKeyword_distribute, StyleTextJustify::InterCharacter },
+  { eCSSKeyword_UNKNOWN, -1 }
+};
+
 const KTableEntry nsCSSProps::kTextCombineUprightKTable[] = {
   { eCSSKeyword_none, NS_STYLE_TEXT_COMBINE_UPRIGHT_NONE },
   { eCSSKeyword_all, NS_STYLE_TEXT_COMBINE_UPRIGHT_ALL },

layout/style/nsCSSProps.h

@@ -869,6 +869,7 @@ public:
   static const KTableEntry kTextEmphasisPositionKTable[];
   static const KTableEntry kTextEmphasisStyleFillKTable[];
   static const KTableEntry kTextEmphasisStyleShapeKTable[];
+  static const KTableEntry kTextJustifyKTable[];
   static const KTableEntry kTextOrientationKTable[];
   static const KTableEntry kTextOverflowKTable[];
   static const KTableEntry kTextTransformKTable[];

layout/style/nsComputedDOMStyle.cpp

@@ -3874,6 +3874,16 @@ nsComputedDOMStyle::DoGetTextIndent()
   return val.forget();
 }
 
+already_AddRefed<CSSValue>
+nsComputedDOMStyle::DoGetTextJustify()
+{
+  RefPtr<nsROCSSPrimitiveValue> val = new nsROCSSPrimitiveValue;
+  val->SetIdent(
+    nsCSSProps::ValueToKeywordEnum(StyleText()->mTextJustify,
+                                   nsCSSProps::kTextJustifyKTable));
+  return val.forget();
+}
+
 already_AddRefed<CSSValue>
 nsComputedDOMStyle::DoGetTextOrientation()
 {

layout/style/nsComputedDOMStyle.h

@@ -421,6 +421,7 @@ private:
   already_AddRefed<CSSValue> DoGetTextEmphasisPosition();
   already_AddRefed<CSSValue> DoGetTextEmphasisStyle();
   already_AddRefed<CSSValue> DoGetTextIndent();
+  already_AddRefed<CSSValue> DoGetTextJustify();
   already_AddRefed<CSSValue> DoGetTextOrientation();
   already_AddRefed<CSSValue> DoGetTextOverflow();
   already_AddRefed<CSSValue> DoGetTextTransform();

layout/style/nsComputedDOMStylePropertyList.h

@@ -239,6 +239,7 @@ COMPUTED_STYLE_PROP(text_emphasis_color,           TextEmphasisColor)
 COMPUTED_STYLE_PROP(text_emphasis_position,        TextEmphasisPosition)
 COMPUTED_STYLE_PROP(text_emphasis_style,           TextEmphasisStyle)
 COMPUTED_STYLE_PROP(text_indent,                   TextIndent)
+COMPUTED_STYLE_PROP(text_justify,                  TextJustify)
 COMPUTED_STYLE_PROP(text_orientation,              TextOrientation)
 COMPUTED_STYLE_PROP(text_overflow,                 TextOverflow)
 COMPUTED_STYLE_PROP(text_shadow,                   TextShadow)

layout/style/nsRuleNode.cpp

@@ -1414,6 +1414,7 @@ struct SetEnumValueHelper
   DEFINE_ENUM_CLASS_SETTER(StyleFillRule, Nonzero, Evenodd)
   DEFINE_ENUM_CLASS_SETTER(StyleFloat, None, InlineEnd)
   DEFINE_ENUM_CLASS_SETTER(StyleFloatEdge, ContentBox, MarginBox)
+  DEFINE_ENUM_CLASS_SETTER(StyleTextJustify, None, InterCharacter)
   DEFINE_ENUM_CLASS_SETTER(StyleUserFocus, None, SelectMenu)
   DEFINE_ENUM_CLASS_SETTER(StyleUserSelect, None, MozText)
   DEFINE_ENUM_CLASS_SETTER(StyleUserInput, None, Auto)
@@ -4783,6 +4784,12 @@ nsRuleNode::ComputeTextData(void* aStartStruct,
              SETCOORD_UNSET_INHERIT,
            aContext, mPresContext, conditions);
 
+  // text-justify: enum, inherit, initial
+  SetValue(*aRuleData->ValueForTextJustify(), text->mTextJustify, conditions,
+           SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,
+           parentText->mTextJustify,
+           StyleTextJustify::Auto);
+
   // text-transform: enum, inherit, initial
   SetValue(*aRuleData->ValueForTextTransform(), text->mTextTransform, conditions,
            SETVAL_ENUMERATED | SETVAL_UNSET_INHERIT,

layout/style/nsStyleConsts.h

@@ -185,6 +185,14 @@ enum class StyleShapeSourceType : uint8_t {
   Box,
 };
 
+// text-justify
+enum class StyleTextJustify : uint8_t {
+  None,
+  Auto,
+  InterWord,
+  InterCharacter,
+};
+
 // user-focus
 enum class StyleUserFocus : uint8_t {
   None,

layout/style/nsStyleStruct.cpp

@@ -3788,6 +3788,7 @@ nsStyleText::nsStyleText(StyleStructContext aContext)
   , mTextAlignLast(NS_STYLE_TEXT_ALIGN_AUTO)
   , mTextAlignTrue(false)
   , mTextAlignLastTrue(false)
+  , mTextJustify(StyleTextJustify::Auto)
   , mTextTransform(NS_STYLE_TEXT_TRANSFORM_NONE)
   , mWhiteSpace(NS_STYLE_WHITESPACE_NORMAL)
   , mWordBreak(NS_STYLE_WORDBREAK_NORMAL)
@@ -3824,6 +3825,7 @@ nsStyleText::nsStyleText(const nsStyleText& aSource)
   , mTextAlignLast(aSource.mTextAlignLast)
   , mTextAlignTrue(false)
   , mTextAlignLastTrue(false)
+  , mTextJustify(aSource.mTextJustify)
   , mTextTransform(aSource.mTextTransform)
   , mWhiteSpace(aSource.mWhiteSpace)
   , mWordBreak(aSource.mWordBreak)
@@ -3885,6 +3887,7 @@ nsStyleText::CalcDifference(const nsStyleText& aNewData) const
       (mTextSizeAdjust != aNewData.mTextSizeAdjust) ||
       (mLetterSpacing != aNewData.mLetterSpacing) ||
       (mLineHeight != aNewData.mLineHeight) ||
+      (mTextJustify != aNewData.mTextJustify) ||
       (mTextIndent != aNewData.mTextIndent) ||
       (mWordSpacing != aNewData.mWordSpacing) ||
       (mTabSize != aNewData.mTabSize)) {

layout/style/nsStyleStruct.h

@@ -2071,6 +2071,7 @@ struct MOZ_NEEDS_MEMMOVABLE_MEMBERS nsStyleText
   uint8_t mTextAlignLast;               // [inherited] see nsStyleConsts.h
   bool mTextAlignTrue : 1;              // [inherited] see nsStyleConsts.h
   bool mTextAlignLastTrue : 1;          // [inherited] see nsStyleConsts.h
+  mozilla::StyleTextJustify mTextJustify;   // [inherited]
   uint8_t mTextTransform;               // [inherited] see nsStyleConsts.h
   uint8_t mWhiteSpace;                  // [inherited] see nsStyleConsts.h
   uint8_t mWordBreak;                   // [inherited] see nsStyleConsts.h

layout/style/test/property_database.js

@@ -5694,6 +5694,17 @@ if (IsCSSPropertyPrefEnabled("layout.css.text-combine-upright.enabled")) {
   }
 }
 
+if (IsCSSPropertyPrefEnabled("layout.css.text-justify.enabled")) {
+  gCSSProperties["text-justify"] = {
+    domProp: "textJustify",
+    inherited: true,
+    type: CSS_TYPE_LONGHAND,
+    initial_values: [ "auto" ],
+    other_values: [ "none", "inter-word", "inter-character", "distribute" ],
+    invalid_values: []
+  };
+}
+
 if (IsCSSPropertyPrefEnabled("svg.paint-order.enabled")) {
   gCSSProperties["paint-order"] = {
     domProp: "paintOrder",