Add support for hyperlink escape sequence

This commit adds support for hyperlink escape sequence
`OSC 8 ; params ; URI ST`. The configuration option responsible for
those is `hints.enabled.hyperlinks`.

Fixes #922.

2 files changed, 6 insertions, 4 deletions

diff --git a/alacritty/src/renderer/mod.rs b/alacritty/src/renderer/mod.rs
index eb0012bd..6ee8815c 100644
--- a/alacritty/src/renderer/mod.rs
+++ b/alacritty/src/renderer/mod.rs
@@ -125,14 +125,14 @@ impl Renderer {
         point: Point<usize>,
         fg: Rgb,
         bg: Rgb,
-        string: &str,
+        string_chars: impl Iterator<Item = char>,
         size_info: &SizeInfo,
         glyph_cache: &mut GlyphCache,
     ) {
-        let cells = string.chars().enumerate().map(|(i, character)| RenderableCell {
+        let cells = string_chars.enumerate().map(|(i, character)| RenderableCell {
             point: Point::new(point.line, point.column + i),
             character,
-            zerowidth: None,
+            extra: None,
             flags: Flags::empty(),
             bg_alpha: 1.0,
             fg,
diff --git a/alacritty/src/renderer/text/mod.rs b/alacritty/src/renderer/text/mod.rs
index 96945f67..228d2671 100644
--- a/alacritty/src/renderer/text/mod.rs
+++ b/alacritty/src/renderer/text/mod.rs
@@ -159,7 +159,9 @@ pub trait TextRenderApi<T: TextRenderBatch>: LoadGlyph {
         self.add_render_item(&cell, &glyph, size_info);
 
         // Render visible zero-width characters.
-        if let Some(zerowidth) = cell.zerowidth.take().filter(|_| !hidden) {
+        if let Some(zerowidth) =
+            cell.extra.as_mut().and_then(|extra| extra.zerowidth.take().filter(|_| !hidden))
+        {
             for character in zerowidth {
                 glyph_key.character = character;
                 let glyph = glyph_cache.get(glyph_key, self, false);