From 890b51b568bcbd8fdbe594f5fcda77d82c18288a Mon Sep 17 00:00:00 2001
From: Dmitry Sharshakov <d3dx12.xx@gmail.com>
Date: Sat, 28 Aug 2021 10:13:19 +0300
Subject: [PATCH] Paginated variables

---
 helix-term/src/commands.rs  | 11 +++++---
 helix-term/src/ui/editor.rs | 53 +++++++++++++++++++++++++++++++++++++
 helix-view/src/editor.rs    |  4 +++
 3 files changed, 64 insertions(+), 4 deletions(-)

diff --git a/helix-term/src/commands.rs b/helix-term/src/commands.rs
index 9cf8bb5c..62200d76 100644
--- a/helix-term/src/commands.rs
+++ b/helix-term/src/commands.rs
@@ -4768,7 +4768,7 @@ fn dap_variables(cx: &mut Context) {
                 return;
             }
         };
-        let mut s = String::new();
+        let mut variables = Vec::new();
 
         for scope in scopes.iter() {
             let response = block_on(debugger.variables(scope.variables_reference));
@@ -4779,12 +4779,15 @@ fn dap_variables(cx: &mut Context) {
                         Some(data_type) => format!("{} ", data_type),
                         None => "".to_owned(),
                     };
-                    // s.push_str(&format!("{}{} = {}; ", prefix, var.name, var.value));
-                    s.push_str(&format!("{}{}; ", prefix, var.name,));
+                    variables.push(format!("{}{} = {}\n", prefix, var.name, var.value));
                 }
             }
         }
-        cx.editor.set_status(s);
+
+        if !variables.is_empty() {
+            cx.editor.variables = Some(variables);
+            cx.editor.variables_page = 0;
+        }
     }
 }
 
diff --git a/helix-term/src/ui/editor.rs b/helix-term/src/ui/editor.rs
index 92a631ed..4843b9ed 100644
--- a/helix-term/src/ui/editor.rs
+++ b/helix-term/src/ui/editor.rs
@@ -711,6 +711,30 @@ impl EditorView {
         event: KeyEvent,
     ) -> Option<KeymapResult> {
         self.autoinfo = None;
+
+        if cxt.editor.variables.is_some() {
+            match event {
+                KeyEvent {
+                    code: KeyCode::Char('h'),
+                    ..
+                } => {
+                    cxt.editor.variables_page = cxt.editor.variables_page.saturating_sub(1);
+                }
+                KeyEvent {
+                    code: KeyCode::Char('l'),
+                    ..
+                } => {
+                    cxt.editor.variables_page = cxt.editor.variables_page.saturating_add(1);
+                }
+                KeyEvent {
+                    code: KeyCode::Esc, ..
+                } => {
+                    cxt.editor.variables = None;
+                }
+                _ => {}
+            }
+            return None;
+        }
         match self.keymaps.get_mut(&mode).unwrap().get(event) {
             KeymapResult::Matched(command) => command.execute(cxt),
             KeymapResult::Pending(node) => self.autoinfo = Some(node.into()),
@@ -1084,6 +1108,35 @@ impl Component for EditorView {
             );
         }
 
+        if let Some(ref vars) = cx.editor.variables {
+            let mut text = String::new();
+            let mut height = 0;
+            let mut max_len = 0;
+
+            let per_page = 15;
+            let num_vars = vars.len();
+            let start = (per_page * cx.editor.variables_page).min(num_vars);
+            let end = (start + per_page).min(num_vars);
+            for line in vars[start..end].to_vec() {
+                max_len = max_len.max(line.len() as u16);
+                height += 1;
+                text.push_str(&line);
+            }
+
+            if vars.len() > per_page {
+                text += "\nMove h, l";
+                height += 1;
+            }
+
+            let mut info = Info {
+                height: 20.min(height + 2),
+                width: 70.min(max_len),
+                title: format!("{} variables", num_vars),
+                text: text + "\nExit Esc",
+            };
+            info.render(area, surface, cx);
+        }
+
         if let Some(ref mut info) = self.autoinfo {
             info.render(area, surface, cx);
         }
diff --git a/helix-view/src/editor.rs b/helix-view/src/editor.rs
index 295dfc0e..faaa5c3a 100644
--- a/helix-view/src/editor.rs
+++ b/helix-view/src/editor.rs
@@ -76,6 +76,8 @@ pub struct Editor {
 
     pub debugger: Option<helix_dap::Client>,
     pub debugger_events: SelectAll<UnboundedReceiverStream<helix_dap::Payload>>,
+    pub variables: Option<Vec<String>>,
+    pub variables_page: usize,
 
     pub clipboard_provider: Box<dyn ClipboardProvider>,
 
@@ -116,6 +118,8 @@ impl Editor {
             language_servers,
             debugger: None,
             debugger_events: SelectAll::new(),
+            variables: None,
+            variables_page: 0,
             syn_loader: config_loader,
             theme_loader: themes,
             registers: Registers::default(),