From 5d740e4eddcb5c96ea879e0fadee5c95aae73a6e Mon Sep 17 00:00:00 2001
From: Ravi Shankar <wafflespeanut@gmail.com>
Date: Sat, 18 Feb 2017 11:13:19 +0530
Subject: [PATCH] Add gecko glue for grid <track-size>

---
 components/style/gecko/values.rs          | 36 ++++++++++++++++++++++-
 components/style/properties/gecko.mako.rs | 32 +++++++++++++++++++-
 2 files changed, 66 insertions(+), 2 deletions(-)

diff --git a/components/style/gecko/values.rs b/components/style/gecko/values.rs
index 5e9f6dabd45..9cea3f36357 100644
--- a/components/style/gecko/values.rs
+++ b/components/style/gecko/values.rs
@@ -8,13 +8,14 @@
 
 use app_units::Au;
 use cssparser::RGBA;
-use gecko_bindings::structs::{nsStyleCoord, StyleShapeRadius};
+use gecko_bindings::structs::{nsStyleCoord, StyleGridTrackBreadth, StyleShapeRadius};
 use gecko_bindings::sugar::ns_style_coord::{CoordData, CoordDataMut, CoordDataValue};
 use std::cmp::max;
 use values::{Auto, Either, None_};
 use values::computed::{Angle, LengthOrPercentageOrNone, Number};
 use values::computed::{LengthOrPercentage, LengthOrPercentageOrAuto};
 use values::computed::basic_shape::ShapeRadius;
+use values::specified::grid::{TrackBreadth, TrackKeyword};
 
 /// A trait that defines an interface to convert from and to `nsStyleCoord`s.
 pub trait GeckoStyleCoordConvertible : Sized {
@@ -137,6 +138,39 @@ impl GeckoStyleCoordConvertible for LengthOrPercentageOrNone {
     }
 }
 
+impl<L: GeckoStyleCoordConvertible> GeckoStyleCoordConvertible for TrackBreadth<L> {
+    fn to_gecko_style_coord<T: CoordDataMut>(&self, coord: &mut T) {
+        match *self {
+            TrackBreadth::Breadth(ref lop) => lop.to_gecko_style_coord(coord),
+            TrackBreadth::Flex(fr) => coord.set_value(CoordDataValue::FlexFraction(fr)),
+            TrackBreadth::Keyword(TrackKeyword::Auto) => coord.set_value(CoordDataValue::Auto),
+            TrackBreadth::Keyword(TrackKeyword::MinContent) =>
+                coord.set_value(CoordDataValue::Enumerated(StyleGridTrackBreadth::MinContent as u32)),
+            TrackBreadth::Keyword(TrackKeyword::MaxContent) =>
+                coord.set_value(CoordDataValue::Enumerated(StyleGridTrackBreadth::MaxContent as u32)),
+        }
+    }
+
+    fn from_gecko_style_coord<T: CoordData>(coord: &T) -> Option<Self> {
+        L::from_gecko_style_coord(coord).map(TrackBreadth::Breadth).or_else(|| {
+            match coord.as_value() {
+                CoordDataValue::Enumerated(v) => {
+                    if v == StyleGridTrackBreadth::MinContent as u32 {
+                        Some(TrackBreadth::Keyword(TrackKeyword::MinContent))
+                    } else if v == StyleGridTrackBreadth::MaxContent as u32 {
+                        Some(TrackBreadth::Keyword(TrackKeyword::MaxContent))
+                    } else {
+                        None
+                    }
+                },
+                CoordDataValue::FlexFraction(fr) => Some(TrackBreadth::Flex(fr)),
+                CoordDataValue::Auto => Some(TrackBreadth::Keyword(TrackKeyword::Auto)),
+                _ => L::from_gecko_style_coord(coord).map(TrackBreadth::Breadth),
+            }
+        })
+    }
+}
+
 impl GeckoStyleCoordConvertible for ShapeRadius {
     fn to_gecko_style_coord<T: CoordDataMut>(&self, coord: &mut T) {
         match *self {
diff --git a/components/style/properties/gecko.mako.rs b/components/style/properties/gecko.mako.rs
index 88766d34fe6..73a53dfe259 100644
--- a/components/style/properties/gecko.mako.rs
+++ b/components/style/properties/gecko.mako.rs
@@ -961,7 +961,7 @@ fn static_assert() {
 <%self:impl_trait style_struct_name="Position"
                   skip_longhands="${skip_position_longhands} z-index box-sizing order align-content
                                   justify-content align-self justify-self align-items
-                                  justify-items">
+                                  justify-items grid-auto-rows grid-auto-columns">
     % for side in SIDES:
     <% impl_split_style_coord("%s" % side.ident,
                               "mOffset",
@@ -1083,6 +1083,36 @@ fn static_assert() {
     }
     % endfor
 
+    % for kind in ["rows", "columns"]:
+    pub fn set_grid_auto_${kind}(&mut self, v: longhands::grid_auto_rows::computed_value::T) {
+        use values::specified::grid::TrackSize;
+
+        match v {
+            TrackSize::FitContent(lop) => {
+                // Gecko sets min value to None and max value to the actual value in fit-content
+                // https://dxr.mozilla.org/mozilla-central/rev/0eef1d5/layout/style/nsRuleNode.cpp#8221
+                self.gecko.mGridAuto${kind.title()}Min.set_value(CoordDataValue::None);
+                lop.to_gecko_style_coord(&mut self.gecko.mGridAuto${kind.title()}Max);
+            },
+            TrackSize::Breadth(breadth) => {
+                // Set the value to both fields if there's one breadth value
+                // https://dxr.mozilla.org/mozilla-central/rev/0eef1d5/layout/style/nsRuleNode.cpp#8230
+                breadth.to_gecko_style_coord(&mut self.gecko.mGridAuto${kind.title()}Min);
+                breadth.to_gecko_style_coord(&mut self.gecko.mGridAuto${kind.title()}Max);
+            },
+            TrackSize::MinMax(min, max) => {
+                min.to_gecko_style_coord(&mut self.gecko.mGridAuto${kind.title()}Min);
+                max.to_gecko_style_coord(&mut self.gecko.mGridAuto${kind.title()}Max);
+            },
+        }
+    }
+
+    pub fn copy_grid_auto_${kind}_from(&mut self, other: &Self) {
+        self.gecko.mGridAuto${kind.title()}Min.copy_from(&other.gecko.mGridAuto${kind.title()}Min);
+        self.gecko.mGridAuto${kind.title()}Max.copy_from(&other.gecko.mGridAuto${kind.title()}Max);
+    }
+    % endfor
+
 </%self:impl_trait>
 
 <% skip_outline_longhands = " ".join("outline-style outline-width".split() +