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Highlight selected text in input fields

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Fixes #9993.  This does not yet allow stylesheets to set the selection colors;
instead it uses a hard-coded orange background and white foreground.
This commit is contained in:
Matt Brubeck 2016-03-18 16:38:17 -07:00
parent f2f05869d6
commit 6171000875
17 changed files with 229 additions and 62 deletions
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27
components/layout/display_list_builder.rs
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@ -104,6 +104,10 @@ impl<'a> DisplayListBuildState<'a> {
/// The logical width of an insertion point: at the moment, a one-pixel-wide line.
const INSERTION_POINT_LOGICAL_WIDTH: Au = Au(1 * AU_PER_PX);
// Colors for selected text. TODO (#8077): Use the ::selection pseudo-element to set these.
const SELECTION_FOREGROUND_COLOR: RGBA = RGBA { red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0 };
const SELECTION_BACKGROUND_COLOR: RGBA = RGBA { red: 1.0, green: 0.5, blue: 0.0, alpha: 1.0 };
// TODO(gw): The transforms spec says that perspective length must
// be positive. However, there is some confusion between the spec
// and browser implementations as to handling the case of 0 for the
@ -922,6 +926,23 @@ impl FragmentDisplayListBuilding for Fragment {
}
_ => return,
};
// Draw a highlighted background if the text is selected.
//
// TODO: Allow non-text fragments to be selected too.
if scanned_text_fragment_info.selected {
state.add_display_item(
DisplayItem::SolidColorClass(box SolidColorDisplayItem {
base: BaseDisplayItem::new(stacking_relative_border_box,
DisplayItemMetadata::new(self.node,
&*self.style,
Cursor::DefaultCursor),
&clip),
color: SELECTION_BACKGROUND_COLOR.to_gfx_color()
}), display_list_section);
}
// Draw a caret at the insertion point.
let insertion_point_index = match scanned_text_fragment_info.insertion_point {
Some(insertion_point_index) => insertion_point_index,
None => return,
@ -1095,7 +1116,11 @@ impl FragmentDisplayListBuilding for Fragment {
//
// NB: According to CSS-BACKGROUNDS, text shadows render in *reverse* order (front
// to back).
let text_color = self.style().get_color().color;
let text_color = if text_fragment.selected {
SELECTION_FOREGROUND_COLOR
} else {
self.style().get_color().color
};
for text_shadow in self.style.get_effects().text_shadow.0.iter().rev() {
let offset = &Point2D::new(text_shadow.offset_x, text_shadow.offset_y);
let color = self.style().resolve_color(text_shadow.color);