Auto merge of #10176 - mbrubeck:selection-range, r=pcwalton

Highlight selected text in input fields

Fixes #9993.  This does not yet allow stylesheets to set the selection colors; instead it uses a hard-coded orange background and white foreground.

r? @pcwalton

<!-- Reviewable:start -->
---
This change is [<img src="https://reviewable.io/review_button.svg" height="35" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/10176)
<!-- Reviewable:end -->

1 files changed, 10 insertions, 0 deletions

diff --git a/components/script/textinput.rs b/components/script/textinput.rs
index 35b49ee57a4..343b114bf2d 100644
--- a/components/script/textinput.rs
+++ b/components/script/textinput.rs
@@ -8,6 +8,7 @@ use clipboard_provider::ClipboardProvider;
 use dom::keyboardevent::{KeyboardEvent, key_value};
 use msg::constellation_msg::{ALT, CONTROL, SHIFT, SUPER};
 use msg::constellation_msg::{Key, KeyModifiers};
+use range::Range;
 use std::borrow::ToOwned;
 use std::cmp::{max, min};
 use std::default::Default;
@@ -154,6 +155,15 @@ impl<T: ClipboardProvider> TextInput<T> {
         })
     }
 
+    pub fn get_absolute_selection_range(&self) -> Range<usize> {
+        match self.get_sorted_selection() {
+            Some((begin, _end)) =>
+                Range::new(self.get_absolute_point_for_text_point(&begin), self.selection_len()),
+            None =>
+                Range::new(self.get_absolute_insertion_point(), 0)
+        }
+    }
+
     pub fn get_selection_text(&self) -> Option<String> {
         self.get_sorted_selection().map(|(begin, end)| {
             if begin.line != end.line {