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Auto merge of #15115 - Wafflespeanut:lop, r=emilio

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Introduce the `NoCalcLength`

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I began this for making the `CalcLengthOrPercentage` represent `LengthOrPercentage` (instead of the enum we already have), but only later did I realize that it will make `LengthOrPercentageOrFoo` types fatty (which is the problem we're trying to avoid - #15061) and so, I dropped that attempt. Along the way, I introduced an internal type for `Length`, for representing all its non-calc variants (which are `Copy`). We could still have this type for the `LengthOrPercentageOrFoo` types which don't really need  `Length` since they already have their own variants for calc.

r? @Manishearth @emilio @SimonSapin or anyone interested

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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors

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- [x] These changes do not require tests because it's a refactor

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This commit is contained in:
bors-servo 2017-01-28 14:08:38 -08:00 • committed by GitHub
commit cd0a6b98f4
19 changed files with 305 additions and 230 deletions
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27
components/script/dom/element.rs
View file

@ -4,7 +4,6 @@
//! Element nodes.
use app_units::Au;
use cssparser::Color;
use devtools_traits::AttrInfo;
use dom::activation::Activatable;
@ -455,18 +454,13 @@ impl LayoutElementHelpers for LayoutJS<Element> {
font_family)])))));
}
let font_size = if let Some(this) = self.downcast::<HTMLFontElement>() {
this.get_size()
} else {
None
};
let font_size = self.downcast::<HTMLFontElement>().and_then(|this| this.get_size());
if let Some(font_size) = font_size {
hints.push(from_declaration(
PropertyDeclaration::FontSize(
DeclaredValue::Value(
font_size::SpecifiedValue(
LengthOrPercentage::Length(font_size))))))
font_size::SpecifiedValue(font_size.into())))))
}
let cellspacing = if let Some(this) = self.downcast::<HTMLTableElement>() {
@ -476,7 +470,7 @@ impl LayoutElementHelpers for LayoutJS<Element> {
};
if let Some(cellspacing) = cellspacing {
let width_value = specified::Length::Absolute(Au::from_px(cellspacing as i32));
let width_value = specified::Length::from_px(cellspacing as f32);
hints.push(from_declaration(
PropertyDeclaration::BorderSpacing(DeclaredValue::Value(
border_spacing::SpecifiedValue {
@ -509,13 +503,12 @@ impl LayoutElementHelpers for LayoutJS<Element> {
};
if let Some(size) = size {
let value = specified::Length::ServoCharacterWidth(specified::CharacterWidth(size));
let value = specified::NoCalcLength::ServoCharacterWidth(specified::CharacterWidth(size));
hints.push(from_declaration(
PropertyDeclaration::Width(DeclaredValue::Value(
specified::LengthOrPercentageOrAuto::Length(value)))));
}
let width = if let Some(this) = self.downcast::<HTMLIFrameElement>() {
this.get_width()
} else if let Some(this) = self.downcast::<HTMLImageElement>() {
@ -541,7 +534,7 @@ impl LayoutElementHelpers for LayoutJS<Element> {
}
LengthOrPercentageOrAuto::Length(length) => {
let width_value = specified::LengthOrPercentageOrAuto::Length(
specified::Length::Absolute(length));
specified::NoCalcLength::Absolute(length));
hints.push(from_declaration(
PropertyDeclaration::Width(DeclaredValue::Value(width_value))));
}
@ -566,7 +559,7 @@ impl LayoutElementHelpers for LayoutJS<Element> {
}
LengthOrPercentageOrAuto::Length(length) => {
let height_value = specified::LengthOrPercentageOrAuto::Length(
specified::Length::Absolute(length));
specified::NoCalcLength::Absolute(length));
hints.push(from_declaration(
PropertyDeclaration::Height(DeclaredValue::Value(height_value))));
}
@ -588,13 +581,12 @@ impl LayoutElementHelpers for LayoutJS<Element> {
// scrollbar size into consideration (but we don't have a scrollbar yet!)
//
// https://html.spec.whatwg.org/multipage/#textarea-effective-width
let value = specified::Length::ServoCharacterWidth(specified::CharacterWidth(cols));
let value = specified::NoCalcLength::ServoCharacterWidth(specified::CharacterWidth(cols));
hints.push(from_declaration(
PropertyDeclaration::Width(DeclaredValue::Value(
specified::LengthOrPercentageOrAuto::Length(value)))));
}
let rows = if let Some(this) = self.downcast::<HTMLTextAreaElement>() {
match this.get_rows() {
0 => None,
@ -608,7 +600,7 @@ impl LayoutElementHelpers for LayoutJS<Element> {
// TODO(mttr) This should take scrollbar size into consideration.
//
// https://html.spec.whatwg.org/multipage/#textarea-effective-height
let value = specified::Length::FontRelative(specified::FontRelativeLength::Em(rows as CSSFloat));
let value = specified::NoCalcLength::FontRelative(specified::FontRelativeLength::Em(rows as CSSFloat));
hints.push(from_declaration(
PropertyDeclaration::Height(DeclaredValue::Value(
specified::LengthOrPercentageOrAuto::Length(value)))));
@ -622,8 +614,7 @@ impl LayoutElementHelpers for LayoutJS<Element> {
};
if let Some(border) = border {
let width_value = specified::BorderWidth::from_length(
specified::Length::Absolute(Au::from_px(border as i32)));
let width_value = specified::BorderWidth::from_length(specified::Length::from_px(border as f32));
hints.push(from_declaration(
PropertyDeclaration::BorderTopWidth(DeclaredValue::Value(width_value.clone()))));
hints.push(from_declaration(