feat: bind vim-style line-by-line scrolling (#8980)

Co-authored-by: Aiden Cline <aidenpcline@gmail.com>

packages/opencode/src/cli/cmd/tui/event.ts

@@ -16,6 +16,8 @@ export const TuiEvent = {
           "session.compact",
           "session.page.up",
           "session.page.down",
+          "session.line.up",
+          "session.line.down",
           "session.half.page.up",
           "session.half.page.down",
           "session.first",

packages/opencode/src/cli/cmd/tui/routes/session/index.tsx

@@ -601,6 +601,28 @@ export function Session() {
         dialog.clear()
       },
     },
+    {
+      title: "Line up",
+      value: "session.line.up",
+      keybind: "messages_line_up",
+      category: "Session",
+      disabled: true,
+      onSelect: (dialog) => {
+        scroll.scrollBy(-1)
+        dialog.clear()
+      },
+    },
+    {
+      title: "Line down",
+      value: "session.line.down",
+      keybind: "messages_line_down",
+      category: "Session",
+      disabled: true,
+      onSelect: (dialog) => {
+        scroll.scrollBy(1)
+        dialog.clear()
+      },
+    },
     {
       title: "Half page up",
       value: "session.half.page.up",

packages/opencode/src/config/config.ts

@@ -651,8 +651,14 @@ export namespace Config {
       session_unshare: z.string().optional().default("none").describe("Unshare current session"),
       session_interrupt: z.string().optional().default("escape").describe("Interrupt current session"),
       session_compact: z.string().optional().default("<leader>c").describe("Compact the session"),
-      messages_page_up: z.string().optional().default("pageup").describe("Scroll messages up by one page"),
-      messages_page_down: z.string().optional().default("pagedown").describe("Scroll messages down by one page"),
+      messages_page_up: z.string().optional().default("pageup,ctrl+alt+b").describe("Scroll messages up by one page"),
+      messages_page_down: z
+        .string()
+        .optional()
+        .default("pagedown,ctrl+alt+f")
+        .describe("Scroll messages down by one page"),
+      messages_line_up: z.string().optional().default("ctrl+alt+y").describe("Scroll messages up by one line"),
+      messages_line_down: z.string().optional().default("ctrl+alt+e").describe("Scroll messages down by one line"),
       messages_half_page_up: z.string().optional().default("ctrl+alt+u").describe("Scroll messages up by half page"),
       messages_half_page_down: z
         .string()

packages/opencode/src/server/routes/tui.ts

@@ -275,6 +275,8 @@ export const TuiRoutes = lazy(() =>
             session_compact: "session.compact",
             messages_page_up: "session.page.up",
             messages_page_down: "session.page.down",
+            messages_line_up: "session.line.up",
+            messages_line_down: "session.line.down",
             messages_half_page_up: "session.half.page.up",
             messages_half_page_down: "session.half.page.down",
             messages_first: "session.first",

packages/sdk/js/src/gen/types.gen.ts

@@ -842,6 +842,14 @@ export type KeybindsConfig = {
    * Scroll messages down by one page
    */
   messages_page_down?: string
+  /**
+   * Scroll messages up by one line
+   */
+  messages_line_up?: string
+  /**
+   * Scroll messages down by one line
+   */
+  messages_line_down?: string
   /**
    * Scroll messages up by half page
    */

packages/sdk/js/src/v2/gen/types.gen.ts

@@ -1019,6 +1019,14 @@ export type KeybindsConfig = {
    * Scroll messages down by one page
    */
   messages_page_down?: string
+  /**
+   * Scroll messages up by one line
+   */
+  messages_line_up?: string
+  /**
+   * Scroll messages down by one line
+   */
+  messages_line_down?: string
   /**
    * Scroll messages up by half page
    */

packages/sdk/openapi.json

@@ -8282,12 +8282,22 @@
           },
           "messages_page_up": {
             "description": "Scroll messages up by one page",
-            "default": "pageup",
+            "default": "pageup,ctrl+alt+b",
             "type": "string"
           },
           "messages_page_down": {
             "description": "Scroll messages down by one page",
-            "default": "pagedown",
+            "default": "pagedown,ctrl+alt+f",
+            "type": "string"
+          },
+          "messages_line_up": {
+            "description": "Scroll messages up by one line",
+            "default": "ctrl+alt+y",
+            "type": "string"
+          },
+          "messages_line_down": {
+            "description": "Scroll messages down by one line",
+            "default": "ctrl+alt+e",
             "type": "string"
           },
           "messages_half_page_up": {

packages/web/src/content/docs/keybinds.mdx

@@ -31,8 +31,10 @@ OpenCode has a list of keybinds that you can customize through the OpenCode conf
     "session_child_cycle": "<leader>right",
     "session_child_cycle_reverse": "<leader>left",
     "session_parent": "<leader>up",
-    "messages_page_up": "pageup",
-    "messages_page_down": "pagedown",
+    "messages_page_up": "pageup,ctrl+alt+b",
+    "messages_page_down": "pagedown,ctrl+alt+f",
+    "messages_line_up": "ctrl+alt+y",
+    "messages_line_down": "ctrl+alt+e",
     "messages_half_page_up": "ctrl+alt+u",
     "messages_half_page_down": "ctrl+alt+d",
     "messages_first": "ctrl+g,home",