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display input caret for textarea. fixes #7758

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This commit is contained in:
Florian Merz 2015-10-21 22:38:23 +02:00
parent 50ec235384
commit 80e8a674e2
6 changed files with 67 additions and 21 deletions
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8
components/script/dom/htmltextareaelement.rs
View file

@ -46,6 +46,8 @@ pub struct HTMLTextAreaElement {
pub trait LayoutHTMLTextAreaElementHelpers {
#[allow(unsafe_code)]
unsafe fn get_value_for_layout(self) -> String;
#[allow(unsafe_code)]
unsafe fn get_absolute_insertion_point_for_layout(self) -> usize;
}
pub trait RawLayoutHTMLTextAreaElementHelpers {
@ -61,6 +63,12 @@ impl LayoutHTMLTextAreaElementHelpers for LayoutJS<HTMLTextAreaElement> {
unsafe fn get_value_for_layout(self) -> String {
(*self.unsafe_get()).textinput.borrow_for_layout().get_content()
}
#[allow(unrooted_must_root)]
#[allow(unsafe_code)]
unsafe fn get_absolute_insertion_point_for_layout(self) -> usize {
(*self.unsafe_get()).textinput.borrow_for_layout().get_absolute_insertion_point()
}
}
impl<'a> RawLayoutHTMLTextAreaElementHelpers for &'a HTMLTextAreaElement {

10
components/script/textinput.rs
View file

@ -455,4 +455,14 @@ impl<T: ClipboardProvider> TextInput<T> {
self.edit_point.line = min(self.edit_point.line, self.lines.len() - 1);
self.edit_point.index = min(self.edit_point.index, self.current_line_length());
}
pub fn get_absolute_insertion_point(&self) -> usize {
self.lines.iter().enumerate().fold(0, |acc, (i, val)| {
if i < self.edit_point.line {
acc + val.len() + 1 // +1 for the \n
} else {
acc
}
}) + self.edit_point.index
}
}