From 5199dcdd27781897b4b4f9e9b124d8df83a8466b Mon Sep 17 00:00:00 2001
From: Levi <ivel.santos@proton.me>
Date: Tue, 8 Apr 2025 15:05:09 -0300
Subject: [PATCH] feat: Vim mode: till_char (#224)

---
 src/keybind/builtin/vim.json |  4 +++
 src/tui/editor.zig           | 67 ++++++++++++++++++++++++++++++++++++
 2 files changed, 71 insertions(+)

diff --git a/src/keybind/builtin/vim.json b/src/keybind/builtin/vim.json
index 9aa765b..1733265 100644
--- a/src/keybind/builtin/vim.json
+++ b/src/keybind/builtin/vim.json
@@ -87,6 +87,8 @@
 
             ["F", "move_to_char", "move_to_char_left"],
             ["f", "move_to_char", "move_to_char_right"],
+            ["T", "move_to_char", "move_till_char_left"],
+            ["t", "move_to_char", "move_till_char_right"],
 
             ["<C-CR>", ["move_down"], ["move_begin"]],
             ["<CR>", ["move_down"], ["move_begin"]],
@@ -131,6 +133,8 @@
 
             ["f", "move_to_char", "select_to_char_right"],
             ["F", "move_to_char", "select_to_char_left_vim"],
+            ["t", "move_to_char", "select_till_char_right"],
+            ["T", "move_to_char", "select_till_char_left_vim"],
 
             ["p", ["paste_internal_vim"], ["enter_mode", "normal"]],
             ["P", ["paste_internal_vim"], ["enter_mode", "normal"]],
diff --git a/src/tui/editor.zig b/src/tui/editor.zig
index d4e80ff..cd29e72 100644
--- a/src/tui/editor.zig
+++ b/src/tui/editor.zig
@@ -3103,6 +3103,42 @@ pub const Editor = struct {
         }
     }
 
+    fn move_cursor_till_char_left(root: Buffer.Root, cursor: *Cursor, ctx: Context, metrics: Buffer.Metrics) error{Stop}!void {
+        var egc: []const u8 = undefined;
+        if (!(ctx.args.match(.{tp.extract(&egc)}) catch return error.Stop))
+            return error.Stop;
+        try move_cursor_left(root, cursor, metrics);
+        var prev = cursor.*;
+        try move_cursor_left(root, &prev, metrics);
+        while (true) {
+            const prev_egc, _, _ = root.egc_at(prev.row, prev.col, metrics) catch return error.Stop;
+            if (std.mem.eql(u8, prev_egc, egc))
+                return;
+            if (is_eol_left(root, cursor, metrics))
+                return;
+            move_cursor_left(root, cursor, metrics) catch return error.Stop;
+            move_cursor_left(root, &prev, metrics) catch return error.Stop;
+        }
+    }
+
+    pub fn move_cursor_till_char_right(root: Buffer.Root, cursor: *Cursor, ctx: Context, metrics: Buffer.Metrics) error{Stop}!void {
+        var egc: []const u8 = undefined;
+        if (!(ctx.args.match(.{tp.extract(&egc)}) catch return error.Stop))
+            return error.Stop;
+        try move_cursor_right(root, cursor, metrics);
+        var next = cursor.*;
+        try move_cursor_right(root, &next, metrics);
+        while (true) {
+            const next_egc, _, _ = root.egc_at(next.row, next.col, metrics) catch return error.Stop;
+            if (std.mem.eql(u8, next_egc, egc))
+                return;
+            if (is_eol_right(root, cursor, metrics))
+                return;
+            move_cursor_right(root, cursor, metrics) catch return error.Stop;
+            move_cursor_right(root, &next, metrics) catch return error.Stop;
+        }
+    }
+
     pub fn move_to_char_left(self: *Self, ctx: Context) Result {
         const root = try self.buf_root();
         self.with_cursors_const_arg(root, move_cursor_to_char_left, ctx) catch {};
@@ -3117,6 +3153,20 @@ pub const Editor = struct {
     }
     pub const move_to_char_right_meta: Meta = .{ .arguments = &.{.integer} };
 
+    pub fn move_till_char_left(self: *Self, ctx: Context) Result {
+        const root = try self.buf_root();
+        self.with_cursors_const_arg(root, move_cursor_till_char_left, ctx) catch {};
+        self.clamp();
+    }
+    pub const move_till_char_left_meta: Meta = .{ .arguments = &.{.integer} };
+
+    pub fn move_till_char_right(self: *Self, ctx: Context) Result {
+        const root = try self.buf_root();
+        self.with_cursors_const_arg(root, move_cursor_till_char_right, ctx) catch {};
+        self.clamp();
+    }
+    pub const move_till_char_right_meta: Meta = .{ .arguments = &.{.integer} };
+
     pub fn move_or_select_to_char_left(self: *Self, ctx: Context) Result {
         const selected = if (self.get_primary().selection) |_| true else false;
         if (selected) try self.select_to_char_left(ctx) else try self.move_to_char_left(ctx);
@@ -3771,6 +3821,16 @@ pub const Editor = struct {
     }
     pub const select_to_char_left_vim_meta: Meta = .{ .arguments = &.{.integer} };
 
+    pub fn select_till_char_left_vim(self: *Self, ctx: Context) Result {
+        const root = try self.buf_root();
+        for (self.cursels.items) |*cursel_| if (cursel_.*) |*cursel| {
+            if (cursel.selection) |*sel| try sel.begin.move_right(root, self.metrics);
+        };
+        self.with_selections_const_arg(root, move_cursor_till_char_left, ctx) catch {};
+        self.clamp();
+    }
+    pub const select_till_char_left_vim_meta: Meta = .{ .arguments = &.{.integer} };
+
     pub fn select_to_char_right(self: *Self, ctx: Context) Result {
         const root = try self.buf_root();
         self.with_selections_const_arg(root, move_cursor_to_char_right, ctx) catch {};
@@ -3778,6 +3838,13 @@ pub const Editor = struct {
     }
     pub const select_to_char_right_meta: Meta = .{ .arguments = &.{.integer} };
 
+    pub fn select_till_char_right(self: *Self, ctx: Context) Result {
+        const root = try self.buf_root();
+        self.with_selections_const_arg(root, move_cursor_till_char_right, ctx) catch {};
+        self.clamp();
+    }
+    pub const select_till_char_right_meta: Meta = .{ .arguments = &.{.integer} };
+
     pub fn select_begin(self: *Self, ctx: Context) Result {
         const root = try self.buf_root();
         try self.with_selections_const_repeat(root, move_cursor_begin, ctx);