Remove language::markdown (#25136)

The language::markdown crate had been superceded by markdown::Mardown.

After #25117, the only two remaining use-cases were rendering git commit
messages (which are arguably not really markdown) and the signature help
(which is definitely not markdown).

Updated the former to use the new markdown component, and the latter to
do syntax highlighting manually.

Release Notes:

- Allow selecting the commit message in git commits

crates/editor/src/commit_tooltip.rs

@@ -2,10 +2,10 @@ use futures::Future;
 use git::blame::BlameEntry;
 use git::PullRequest;
 use gpui::{
-    App, Asset, ClipboardItem, Element, ParentElement, Render, ScrollHandle,
-    StatefulInteractiveElement, WeakEntity,
+    App, Asset, ClipboardItem, Element, Entity, MouseButton, ParentElement, Render, ScrollHandle,
+    StatefulInteractiveElement,
 };
-use language::ParsedMarkdown;
+use markdown::Markdown;
 use settings::Settings;
 use std::hash::Hash;
 use theme::ThemeSettings;
@@ -13,10 +13,9 @@ use time::{OffsetDateTime, UtcOffset};
 use time_format::format_local_timestamp;
 use ui::{prelude::*, tooltip_container, Avatar, Divider, IconButtonShape};
 use url::Url;
-use workspace::Workspace;
 
 use crate::git::blame::GitRemote;
-use crate::EditorStyle;
+use crate::hover_popover::hover_markdown_style;
 
 #[derive(Clone, Debug)]
 pub struct CommitDetails {
@@ -30,7 +29,6 @@ pub struct CommitDetails {
 #[derive(Clone, Debug, Default)]
 pub struct ParsedCommitMessage {
     pub message: SharedString,
-    pub parsed_message: ParsedMarkdown,
     pub permalink: Option<Url>,
     pub pull_request: Option<PullRequest>,
     pub remote: Option<GitRemote>,
@@ -115,48 +113,65 @@ impl Asset for CommitAvatarAsset {
 
 pub struct CommitTooltip {
     commit: CommitDetails,
-    editor_style: EditorStyle,
-    workspace: Option<WeakEntity<Workspace>>,
     scroll_handle: ScrollHandle,
+    markdown: Entity<Markdown>,
 }
 
 impl CommitTooltip {
     pub fn blame_entry(
-        blame: BlameEntry,
+        blame: &BlameEntry,
         details: Option<ParsedCommitMessage>,
-        style: EditorStyle,
-        workspace: Option<WeakEntity<Workspace>>,
+        window: &mut Window,
+        cx: &mut Context<Self>,
     ) -> Self {
         let commit_time = blame
             .committer_time
             .and_then(|t| OffsetDateTime::from_unix_timestamp(t).ok())
             .unwrap_or(OffsetDateTime::now_utc());
+
         Self::new(
             CommitDetails {
                 sha: blame.sha.to_string().into(),
                 commit_time,
                 committer_name: blame
                     .committer_name
+                    .clone()
                     .unwrap_or("<no name>".to_string())
                     .into(),
-                committer_email: blame.committer_email.unwrap_or("".to_string()).into(),
+                committer_email: blame
+                    .committer_email
+                    .clone()
+                    .unwrap_or("".to_string())
+                    .into(),
                 message: details,
             },
-            style,
-            workspace,
+            window,
+            cx,
         )
     }
 
-    pub fn new(
-        commit: CommitDetails,
-        editor_style: EditorStyle,
-        workspace: Option<WeakEntity<Workspace>>,
-    ) -> Self {
+    pub fn new(commit: CommitDetails, window: &mut Window, cx: &mut Context<Self>) -> Self {
+        let mut style = hover_markdown_style(window, cx);
+        if let Some(code_block) = &style.code_block.text {
+            style.base_text_style.refine(code_block);
+        }
+        let markdown = cx.new(|cx| {
+            Markdown::new(
+                commit
+                    .message
+                    .as_ref()
+                    .map(|message| message.message.clone())
+                    .unwrap_or_default(),
+                style,
+                None,
+                None,
+                cx,
+            )
+        });
         Self {
-            editor_style,
             commit,
-            workspace,
             scroll_handle: ScrollHandle::new(),
+            markdown,
         }
     }
 }
@@ -186,16 +201,7 @@ impl Render for CommitTooltip {
             .commit
             .message
             .as_ref()
-            .map(|details| {
-                crate::render_parsed_markdown(
-                    "blame-message",
-                    &details.parsed_message,
-                    &self.editor_style,
-                    self.workspace.clone(),
-                    cx,
-                )
-                .into_any()
-            })
+            .map(|_| self.markdown.clone().into_any_element())
             .unwrap_or("<no commit message>".into_any());
 
         let pull_request = self
@@ -210,6 +216,7 @@ impl Render for CommitTooltip {
         tooltip_container(window, cx, move |this, _, cx| {
             this.occlude()
                 .on_mouse_move(|_, _, cx| cx.stop_propagation())
+                .on_mouse_down(MouseButton::Left, |_, _, cx| cx.stop_propagation())
                 .child(
                     v_flex()
                         .w(gpui::rems(30.))
@@ -235,7 +242,6 @@ impl Render for CommitTooltip {
                         .child(
                             div()
                                 .id("inline-blame-commit-message")
-                                .occlude()
                                 .child(message)
                                 .max_h(message_max_height)
                                 .overflow_y_scroll()