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/** Text layout. */
use layout::box::{TextBox, RenderBox, RenderBoxData, UnscannedTextBox};
use gfx::text::text_run::TextRun;
use gfx::util::range::Range;
pub struct TextBoxData {
run: @TextRun,
range: Range,
}
pub fn TextBoxData(run: @TextRun, range: &const Range) -> TextBoxData {
TextBoxData {
run: run,
range: copy *range,
}
}
pub fn adapt_textbox_with_range(box_data: &RenderBoxData, run: @TextRun,
range: &const Range) -> @RenderBox {
assert range.begin() < run.char_len();
assert range.end() <= run.char_len();
assert range.length() > 0;
debug!("Creating textbox with span: (strlen=%u, off=%u, len=%u) of textrun: %s",
run.char_len(), range.begin(), range.length(), run.text);
let new_box_data = copy *box_data;
let new_text_data = TextBoxData(run, range);
let metrics = run.metrics_for_range(range);
new_box_data.position.size = metrics.bounding_box.size;
@TextBox(move new_box_data, move new_text_data)
}
trait UnscannedMethods {
pure fn raw_text() -> ~str;
}
impl RenderBox : UnscannedMethods {
pure fn raw_text() -> ~str {
match &self {
&UnscannedTextBox(_, s) => copy s,
_ => fail ~"unsupported operation: box.raw_text() on non-unscanned text box."
}
}
}
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