Auto merge of #11445 - mbrubeck:line-height, r=emilio

Support line-height in geckolib

r? @bholley

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components/style/properties/longhand/inherited_text.mako.rs

@@ -15,6 +15,9 @@
     #[derive(Debug, Clone, PartialEq, Copy, HeapSizeOf)]
     pub enum SpecifiedValue {
         Normal,
+        % if product == "gecko":
+            MozBlockHeight,
+        % endif
         Number(CSSFloat),
         LengthOrPercentage(specified::LengthOrPercentage),
     }
@@ -23,6 +26,9 @@
         fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
             match *self {
                 SpecifiedValue::Normal => dest.write_str("normal"),
+                % if product == "gecko":
+                    SpecifiedValue::MozBlockHeight => dest.write_str("-moz-block-height"),
+                % endif
                 SpecifiedValue::LengthOrPercentage(value) => value.to_css(dest),
                 SpecifiedValue::Number(number) => write!(dest, "{}", number),
             }
@@ -42,6 +48,11 @@
                 Token::Ident(ref value) if value.eq_ignore_ascii_case("normal") => {
                     Ok(SpecifiedValue::Normal)
                 }
+                % if product == "gecko":
+                Token::Ident(ref value) if value.eq_ignore_ascii_case("-moz-block-height") => {
+                    Ok(SpecifiedValue::MozBlockHeight)
+                }
+                % endif
                 _ => Err(()),
             }
         })
@@ -53,6 +64,9 @@
         #[derive(PartialEq, Copy, Clone, HeapSizeOf, Debug)]
         pub enum T {
             Normal,
+            % if product == "gecko":
+                MozBlockHeight,
+            % endif
             Length(Au),
             Number(CSSFloat),
         }
@@ -61,6 +75,9 @@
         fn to_css<W>(&self, dest: &mut W) -> fmt::Result where W: fmt::Write {
             match *self {
                 computed_value::T::Normal => dest.write_str("normal"),
+                % if product == "gecko":
+                    computed_value::T::MozBlockHeight => dest.write_str("-moz-block-height"),
+                % endif
                 computed_value::T::Length(length) => length.to_css(dest),
                 computed_value::T::Number(number) => write!(dest, "{}", number),
             }
@@ -76,6 +93,9 @@
         fn to_computed_value<Cx: TContext>(&self, context: &Cx) -> computed_value::T {
             match *self {
                 SpecifiedValue::Normal => computed_value::T::Normal,
+                % if product == "gecko":
+                    SpecifiedValue::MozBlockHeight => computed_value::T::MozBlockHeight,
+                % endif
                 SpecifiedValue::Number(value) => computed_value::T::Number(value),
                 SpecifiedValue::LengthOrPercentage(value) => {
                     match value {

ports/geckolib/properties.mako.rs

@@ -20,7 +20,6 @@ use gecko_bindings::bindings::{Gecko_CopyMozBindingFrom, Gecko_CopyListStyleType
 use gecko_bindings::bindings::{Gecko_SetMozBinding, Gecko_SetListStyleType};
 use gecko_bindings::structs;
 use glue::ArcHelpers;
-use heapsize::HeapSizeOf;
 use std::fmt::{self, Debug};
 use std::mem::{transmute, zeroed};
 use std::sync::Arc;
@@ -149,6 +148,12 @@ pub struct ${style_struct.gecko_struct_name} {
     }
 </%def>
 
+<%def name="impl_coord_copy(ident, gecko_ffi_name)">
+    fn copy_${ident}_from(&mut self, other: &Self) {
+        self.gecko.${gecko_ffi_name}.copy_from(&other.gecko.${gecko_ffi_name});
+    }
+</%def>
+
 <%!
 def is_border_style_masked(ffi_name):
     return ffi_name.split("[")[0] in ["mBorderStyle", "mOutlineStyle", "mTextDecorationStyle"]
@@ -673,11 +678,8 @@ fn static_assert() {
             T::LengthOrPercentage(v) => self.gecko.mVerticalAlign.set(v),
         }
     }
-    fn copy_vertical_align_from(&mut self, other: &Self) {
+
-        debug_assert_unit_is_safe_to_copy(self.gecko.mVerticalAlign.mUnit);
+    <%call expr="impl_coord_copy('vertical_align', 'mVerticalAlign')"></%call>
-        self.gecko.mVerticalAlign.mUnit = other.gecko.mVerticalAlign.mUnit;
-        self.gecko.mVerticalAlign.mValue = other.gecko.mVerticalAlign.mValue;
-    }
 
     fn set__moz_binding(&mut self, v: longhands::_moz_binding::computed_value::T) {
         use style::properties::longhands::_moz_binding::SpecifiedValue as BindingValue;
@@ -719,12 +721,26 @@ fn static_assert() {
 </%self:impl_trait>
 
 <%self:impl_trait style_struct_name="InheritedText"
-                  skip_longhands="text-align">
+                  skip_longhands="text-align line-height">
 
     <% text_align_keyword = Keyword("text-align", "start end left right center justify -moz-center -moz-left " +
                                                   "-moz-right match-parent") %>
     <%call expr="impl_keyword('text_align', 'mTextAlign', text_align_keyword, need_clone=False)"></%call>
 
+    fn set_line_height(&mut self, v: longhands::line_height::computed_value::T) {
+        use style::properties::longhands::line_height::computed_value::T;
+        // FIXME: Align binary representations and ditch |match| for cast + static_asserts
+        match v {
+            T::Normal => self.gecko.mLineHeight.set_normal(),
+            T::Length(val) => self.gecko.mLineHeight.set_coord(val),
+            T::Number(val) => self.gecko.mLineHeight.set_factor(val),
+            T::MozBlockHeight =>
+                self.gecko.mLineHeight.set_enum(structs::NS_STYLE_LINE_HEIGHT_BLOCK_HEIGHT as i32),
+        }
+    }
+
+    <%call expr="impl_coord_copy('line_height', 'mLineHeight')"></%call>
+
 </%self:impl_trait>
 
 <%self:impl_trait style_struct_name="Text"

ports/geckolib/values.rs

@@ -9,15 +9,25 @@ use std::cmp::max;
 use style::values::computed::{LengthOrPercentage, LengthOrPercentageOrAuto, LengthOrPercentageOrNone};
 
 pub trait StyleCoordHelpers {
+    fn copy_from(&mut self, other: &Self);
     fn set<T: ToGeckoStyleCoord>(&mut self, val: T);
     fn set_auto(&mut self);
+    fn set_normal(&mut self);
     fn set_coord(&mut self, val: Au);
     fn set_int(&mut self, val: i32);
     fn set_enum(&mut self, val: i32);
     fn set_percent(&mut self, val: f32);
+    fn set_factor(&mut self, val: f32);
 }
 
 impl StyleCoordHelpers for nsStyleCoord {
+    fn copy_from(&mut self, other: &Self) {
+        debug_assert_unit_is_safe_to_copy(self.mUnit);
+        debug_assert_unit_is_safe_to_copy(other.mUnit);
+        self.mUnit = other.mUnit;
+        self.mValue = other.mValue;
+    }
+
     fn set<T: ToGeckoStyleCoord>(&mut self, val: T) {
         val.to_gecko_style_coord(&mut self.mUnit, &mut self.mValue);
     }
@@ -27,6 +37,11 @@ impl StyleCoordHelpers for nsStyleCoord {
         unsafe { *self.mValue.mInt.as_mut() = 0; }
     }
 
+    fn set_normal(&mut self) {
+        self.mUnit = nsStyleUnit::eStyleUnit_Normal;
+        unsafe { *self.mValue.mInt.as_mut() = 0; }
+    }
+
     fn set_coord(&mut self, val: Au) {
         self.mUnit = nsStyleUnit::eStyleUnit_Coord;
         unsafe { *self.mValue.mInt.as_mut() = val.0; }
@@ -46,6 +61,11 @@ impl StyleCoordHelpers for nsStyleCoord {
         self.mUnit = nsStyleUnit::eStyleUnit_Enumerated;
         unsafe { *self.mValue.mInt.as_mut() = val; }
     }
+
+    fn set_factor(&mut self, val: f32) {
+        self.mUnit = nsStyleUnit::eStyleUnit_Factor;
+        unsafe { *self.mValue.mFloat.as_mut() = val; }
+    }
 }
 
 pub trait ToGeckoStyleCoord {

ports/geckolib/wrapper.rs

@@ -41,6 +41,7 @@ use style::dom::{TDocument, TElement, TNode, TRestyleDamage, UnsafeNode};
 use style::element_state::ElementState;
 #[allow(unused_imports)] // Used in commented-out code.
 use style::error_reporting::StdoutErrorReporter;
+#[allow(unused_imports)] // Used in commented-out code.
 use style::parser::ParserContextExtraData;
 #[allow(unused_imports)] // Used in commented-out code.
 use style::properties::parse_style_attribute;