Add a skeleton implementation of TComputedValues in geckolib.

7 files changed, 260 insertions, 16 deletions

diff --git a/components/style/lib.rs b/components/style/lib.rs
index a696b882d43..951a32cd3ce 100644
--- a/components/style/lib.rs
+++ b/components/style/lib.rs
@@ -50,7 +50,7 @@ pub mod animation;
 pub mod attr;
 pub mod bezier;
 pub mod context;
-mod custom_properties;
+pub mod custom_properties;
 pub mod data;
 pub mod dom;
 pub mod element_state;
diff --git a/ports/geckolib/Cargo.toml b/ports/geckolib/Cargo.toml
index c8d5dcabcea..cd9031ee98e 100644
--- a/ports/geckolib/Cargo.toml
+++ b/ports/geckolib/Cargo.toml
@@ -3,6 +3,8 @@ name = "geckoservo"
 version = "0.0.1"
 authors = ["The Servo Project Developers"]
 
+build = "build.rs"
+
 [lib]
 name = "geckoservo"
 path = "lib.rs"
diff --git a/ports/geckolib/build.rs b/ports/geckolib/build.rs
new file mode 100644
index 00000000000..0cb930b072b
--- /dev/null
+++ b/ports/geckolib/build.rs
@@ -0,0 +1,80 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use std::env;
+use std::fs::File;
+use std::io::Write;
+use std::path::Path;
+use std::process::{Command, Stdio, exit};
+
+#[cfg(windows)]
+fn find_python() -> String {
+    if Command::new("python27.exe").arg("--version").output().is_ok() {
+        return "python27.exe".to_owned();
+    }
+
+    if Command::new("python.exe").arg("--version").output().is_ok() {
+        return "python.exe".to_owned();
+    }
+
+    panic!("Can't find python (tried python27.exe and python.exe)! Try fixing PATH or setting the PYTHON env var");
+}
+
+#[cfg(not(windows))]
+fn find_python() -> String {
+    if Command::new("python2.7").arg("--version").output().unwrap().status.success() {
+        "python2.7"
+    } else {
+        "python"
+    }.to_owned()
+}
+
+fn main() {
+    let python = match env::var("PYTHON") {
+        Ok(python_path) => python_path,
+        Err(_) => find_python(),
+    };
+
+    // Mako refuses to load templates outside the scope of the current working directory,
+    // so we need to run it from the top source directory.
+    let geckolib_dir = Path::new(file!()).parent().unwrap();
+    let top_dir = geckolib_dir.join("..").join("..");
+
+    let style_template = Path::new("components/style/properties.mako.rs");
+    let geckolib_template = Path::new("ports/geckolib/properties.mako.rs");
+    let mako = Path::new("components/style/Mako-0.9.1.zip");
+
+    let result = Command::new(python)
+        .current_dir(top_dir)
+        .env("PYTHONPATH", &mako)
+        .env("STYLE_TEMPLATE", &style_template)
+        .env("GECKOLIB_TEMPLATE", &geckolib_template)
+        .arg("-c")
+        .arg(r#"
+import json
+import os
+import sys
+from mako.template import Template
+from mako import exceptions
+try:
+    style_template = Template(filename=os.environ['STYLE_TEMPLATE'], input_encoding='utf8')
+    style_template.render()
+
+    geckolib_template = Template(filename=os.environ['GECKOLIB_TEMPLATE'], input_encoding='utf8')
+    output = geckolib_template.render(STYLE_STRUCTS = style_template.module.STYLE_STRUCTS,
+                                      LONGHANDS = style_template.module.LONGHANDS)
+    print(output.encode('utf8'))
+except:
+    sys.stderr.write(exceptions.text_error_template().render().encode('utf8'))
+    sys.exit(1)
+"#)
+        .stderr(Stdio::inherit())
+        .output()
+        .unwrap();
+    if !result.status.success() {
+        exit(1)
+    }
+    let out = env::var("OUT_DIR").unwrap();
+    File::create(&Path::new(&out).join("properties.rs")).unwrap().write_all(&result.stdout).unwrap();
+}
diff --git a/ports/geckolib/lib.rs b/ports/geckolib/lib.rs
index 70f265526d9..e28bf611a5c 100644
--- a/ports/geckolib/lib.rs
+++ b/ports/geckolib/lib.rs
@@ -37,7 +37,13 @@ mod bindings;
 mod data;
 #[allow(non_snake_case)]
 pub mod glue;
-mod properties;
 mod selector_impl;
 mod traversal;
 mod wrapper;
+
+// Generated from the properties.mako.rs template by build.rs
+#[macro_use]
+#[allow(unsafe_code)]
+pub mod properties {
+    include!(concat!(env!("OUT_DIR"), "/properties.rs"));
+}
diff --git a/ports/geckolib/properties.mako.rs b/ports/geckolib/properties.mako.rs
new file mode 100644
index 00000000000..4d2010dcecd
--- /dev/null
+++ b/ports/geckolib/properties.mako.rs
@@ -0,0 +1,168 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use app_units::Au;
+use std::sync::Arc;
+use style::custom_properties::ComputedValuesMap;
+use style::logical_geometry::WritingMode;
+use style::properties::{CascadePropertyFn, ComputedValues, TComputedValues};
+use style::properties::longhands;
+use style::properties::style_struct_traits::*;
+
+#[derive(Clone)]
+pub struct GeckoComputedValues {
+    % for style_struct in STYLE_STRUCTS:
+    ${style_struct.ident}: Arc<Gecko${style_struct.name}>,
+    % endfor
+
+    custom_properties: Option<Arc<ComputedValuesMap>>,
+    shareable: bool,
+    pub writing_mode: WritingMode,
+    pub root_font_size: Au,
+}
+
+impl TComputedValues for GeckoComputedValues {
+% for style_struct in STYLE_STRUCTS:
+    type Concrete${style_struct.name} = Gecko${style_struct.name};
+% endfor
+
+    // These will go away, and we will never implement them.
+    fn as_servo<'a>(&'a self) -> &'a ComputedValues { unimplemented!() }
+    fn as_servo_mut<'a>(&'a mut self) -> &'a mut ComputedValues { unimplemented!() }
+
+    fn new(custom_properties: Option<Arc<ComputedValuesMap>>,
+           shareable: bool,
+           writing_mode: WritingMode,
+           root_font_size: Au,
+            % for style_struct in STYLE_STRUCTS:
+           ${style_struct.ident}: Arc<Gecko${style_struct.name}>,
+            % endfor
+    ) -> Self {
+        GeckoComputedValues {
+            custom_properties: custom_properties,
+            shareable: shareable,
+            writing_mode: writing_mode,
+            root_font_size: root_font_size,
+            % for style_struct in STYLE_STRUCTS:
+            ${style_struct.ident}: ${style_struct.ident},
+            % endfor
+        }
+    }
+
+    fn initial_values() -> &'static Self { unimplemented!() }
+
+    fn do_cascade_property<F: FnOnce(&Vec<Option<CascadePropertyFn<Self>>>)>(_: F) {
+        unimplemented!()
+    }
+
+    % for style_struct in STYLE_STRUCTS:
+    #[inline]
+    fn clone_${style_struct.name.lower()}(&self) -> Arc<Self::Concrete${style_struct.name}> {
+        self.${style_struct.ident}.clone()
+    }
+    #[inline]
+    fn get_${style_struct.name.lower()}<'a>(&'a self) -> &'a Self::Concrete${style_struct.name} {
+        &self.${style_struct.ident}
+    }
+    #[inline]
+    fn mutate_${style_struct.name.lower()}<'a>(&'a mut self) -> &'a mut Self::Concrete${style_struct.name} {
+        Arc::make_mut(&mut self.${style_struct.ident})
+    }
+    % endfor
+
+    fn custom_properties(&self) -> Option<Arc<ComputedValuesMap>> { self.custom_properties.as_ref().map(|x| x.clone())}
+    fn root_font_size(&self) -> Au { self.root_font_size }
+    fn set_root_font_size(&mut self, s: Au) { self.root_font_size = s; }
+    fn set_writing_mode(&mut self, mode: WritingMode) { self.writing_mode = mode; }
+
+    #[inline]
+    fn is_multicol(&self) -> bool { unimplemented!() }
+}
+
+% for style_struct in STYLE_STRUCTS:
+#[derive(PartialEq, Clone, HeapSizeOf, Debug)]
+pub struct Gecko${style_struct.name};
+impl T${style_struct.name} for Gecko${style_struct.name} {
+    % for longhand in style_struct.longhands:
+    fn set_${longhand.ident}(&mut self, _: longhands::${longhand.ident}::computed_value::T) {
+        unimplemented!()
+    }
+    fn copy_${longhand.ident}_from(&mut self, _: &Self) {
+        unimplemented!()
+    }
+    % endfor
+    % if style_struct.name == "Animation":
+    fn transition_count(&self) -> usize {
+        unimplemented!()
+    }
+    % elif style_struct.name == "Border":
+    % for side in ["top", "right", "bottom", "left"]:
+    fn border_${side}_is_none_or_hidden_and_has_nonzero_width(&self) -> bool {
+        unimplemented!()
+    }
+    % endfor
+    % elif style_struct.name == "Box":
+    fn clone_display(&self) -> longhands::display::computed_value::T {
+        unimplemented!()
+    }
+    fn clone_position(&self) -> longhands::position::computed_value::T {
+        unimplemented!()
+    }
+    fn is_floated(&self) -> bool {
+        unimplemented!()
+    }
+    fn overflow_x_is_visible(&self) -> bool {
+        unimplemented!()
+    }
+    fn overflow_y_is_visible(&self) -> bool {
+        unimplemented!()
+    }
+    % elif style_struct.name == "Color":
+    fn clone_color(&self) -> longhands::color::computed_value::T {
+        unimplemented!()
+    }
+    % elif style_struct.name == "Font":
+    fn clone_font_size(&self) -> longhands::font_size::computed_value::T {
+        unimplemented!()
+    }
+    fn clone_font_weight(&self) -> longhands::font_weight::computed_value::T {
+        unimplemented!()
+    }
+    fn compute_font_hash(&mut self) {
+        unimplemented!()
+    }
+    % elif style_struct.name == "InheritedBox":
+    fn clone_direction(&self) -> longhands::direction::computed_value::T {
+        unimplemented!()
+    }
+    fn clone_writing_mode(&self) -> longhands::writing_mode::computed_value::T {
+        unimplemented!()
+    }
+    fn clone_text_orientation(&self) -> longhands::text_orientation::computed_value::T {
+        unimplemented!()
+    }
+    % elif style_struct.name == "InheritedText":
+    fn clone__servo_text_decorations_in_effect(&self) ->
+        longhands::_servo_text_decorations_in_effect::computed_value::T {
+        unimplemented!()
+    }
+    % elif style_struct.name == "Outline":
+    fn outline_is_none_or_hidden_and_has_nonzero_width(&self) -> bool {
+        unimplemented!()
+    }
+    % elif style_struct.name == "Text":
+    fn has_underline(&self) -> bool {
+        unimplemented!()
+    }
+    fn has_overline(&self) -> bool {
+        unimplemented!()
+    }
+    fn has_line_through(&self) -> bool {
+        unimplemented!()
+    }
+    % endif
+
+}
+
+% endfor
diff --git a/ports/geckolib/properties.rs b/ports/geckolib/properties.rs
deleted file mode 100644
index 176c2927e14..00000000000
--- a/ports/geckolib/properties.rs
+++ /dev/null
@@ -1,8 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-use style::properties::ComputedValues;
-
-// FIXME(bholley): Create and use an actual Gecko type here.
-pub type GeckoComputedValues = ComputedValues;
diff --git a/ports/geckolib/selector_impl.rs b/ports/geckolib/selector_impl.rs
index 0b3b883e4ef..0bd84ab9782 100644
--- a/ports/geckolib/selector_impl.rs
+++ b/ports/geckolib/selector_impl.rs
@@ -2,20 +2,16 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+use properties::GeckoComputedValues;
 use selectors::parser::{ParserContext, SelectorImpl};
-use std::process;
 use style;
 use style::element_state::ElementState;
-use style::error_reporting::StdoutErrorReporter;
-use style::properties::ComputedValues;
 use style::selector_impl::SelectorImplExt;
-use style::stylesheets::Origin;
-use url::Url;
 
 pub type Stylist = style::selector_matching::Stylist<GeckoSelectorImpl>;
 pub type Stylesheet = style::stylesheets::Stylesheet<GeckoSelectorImpl>;
 pub type SharedStyleContext = style::context::SharedStyleContext<GeckoSelectorImpl>;
-pub type PrivateStyleData = style::data::PrivateStyleData<GeckoSelectorImpl, ComputedValues>;
+pub type PrivateStyleData = style::data::PrivateStyleData<GeckoSelectorImpl, GeckoComputedValues>;
 
 pub struct GeckoSelectorImpl;