From 07e97e6cadd36ccb4c5e9a3e6cbb40266a057450 Mon Sep 17 00:00:00 2001
From: Max Brunsfeld <maxbrunsfeld@gmail.com>
Date: Tue, 20 Jul 2021 15:30:50 -0700
Subject: [PATCH] wip

---
 zed/src/editor.rs                      |  4 ++++
 zed/src/editor/display_map/wrap_map.rs | 10 +++++++++-
 zed/src/editor/element.rs              |  2 ++
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/zed/src/editor.rs b/zed/src/editor.rs
index d06b4611d4e2be94bb2c89092917296e34f7c1f3..9f9a0e955a71831580578d71125e192f5bf2a231 100644
--- a/zed/src/editor.rs
+++ b/zed/src/editor.rs
@@ -2190,6 +2190,10 @@ impl Editor {
         font_cache.em_width(font_id, settings.buffer_font_size)
     }
 
+    pub fn set_width(&self, width: f32) {
+        self.display_map.set_wrap_width(Some(width));
+    }
+
     // TODO: Can we make this not return a result?
     pub fn max_line_number_width(
         &self,
diff --git a/zed/src/editor/display_map/wrap_map.rs b/zed/src/editor/display_map/wrap_map.rs
index 8dfef04a112c04206ef5676b0c160b05694990b9..cf8cc1aa09809eb2b9cd9ec9f18b3daf1ee7fdbd 100644
--- a/zed/src/editor/display_map/wrap_map.rs
+++ b/zed/src/editor/display_map/wrap_map.rs
@@ -293,6 +293,14 @@ struct BackgroundWrapper {
     snapshot: Snapshot,
 }
 
+enum WrapChange {
+    InputChange {
+        snapshot: InputSnapshot,
+        edits: Vec<tab_map::Edit>,
+    },
+    WidthChange(Option<f32>),
+}
+
 impl BackgroundWrapper {
     fn new(
         snapshot: Snapshot,
@@ -313,7 +321,7 @@ impl BackgroundWrapper {
     async fn run(
         &mut self,
         snapshot: InputSnapshot,
-        edits_rx: channel::Receiver<(InputSnapshot, Vec<InputEdit>)>,
+        edits_rx: channel::Receiver<WrapChange>,
         mut snapshot_tx: watch::Sender<Snapshot>,
     ) {
         let edit = InputEdit {
diff --git a/zed/src/editor/element.rs b/zed/src/editor/element.rs
index 2921b2ce6afc3bdcec7beb4a1ddcfcbd8299a47a..70a254f0d5315df09d3b8efcb0e3279febd46b88 100644
--- a/zed/src/editor/element.rs
+++ b/zed/src/editor/element.rs
@@ -338,6 +338,8 @@ impl Element for EditorElement {
         }
 
         let view = self.view(app);
+        view.set_width(size.x());
+
         let font_cache = &cx.font_cache;
         let layout_cache = &cx.text_layout_cache;
         let line_height = view.line_height(font_cache);