From acd45efe6425e4ff52e427e089c3c6f4b8a038a3 Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Sat, 21 May 2022 18:58:53 -0700
Subject: [PATCH] more efficient eraseLines

---
 src/Window.zig            |  2 +-
 src/terminal/Terminal.zig | 17 ++++-------------
 src/terminal/stream.zig   |  2 +-
 3 files changed, 6 insertions(+), 15 deletions(-)

diff --git a/src/Window.zig b/src/Window.zig
index 3eb2f9889..8d85a358c 100644
--- a/src/Window.zig
+++ b/src/Window.zig
@@ -648,7 +648,7 @@ pub fn eraseDisplay(self: *Window, mode: terminal.EraseDisplay) !void {
 }
 
 pub fn eraseLine(self: *Window, mode: terminal.EraseLine) !void {
-    try self.terminal.eraseLine(self.alloc, mode);
+    try self.terminal.eraseLine(mode);
 }
 
 pub fn deleteChars(self: *Window, count: usize) !void {
diff --git a/src/terminal/Terminal.zig b/src/terminal/Terminal.zig
index 00dda19d7..2c0440ff0 100644
--- a/src/terminal/Terminal.zig
+++ b/src/terminal/Terminal.zig
@@ -259,26 +259,17 @@ pub fn eraseDisplay(
 /// TODO: test
 pub fn eraseLine(
     self: *Terminal,
-    alloc: Allocator,
     mode: csi.EraseLine,
 ) !void {
     switch (mode) {
         .right => {
-            var x: usize = self.cursor.x;
-            while (x < self.cols) : (x += 1) {
-                const cell = try self.getOrPutCell(alloc, x, self.cursor.y);
-                cell.* = self.cursor.pen;
-                cell.char = 0;
-            }
+            const row = self.screen.getRow(self.cursor.y);
+            std.mem.set(Screen.Cell, row[self.cursor.x..], self.cursor.pen);
         },
 
         .left => {
-            var x: usize = self.cursor.x;
-            while (x >= 0) : (x -= 1) {
-                const cell = try self.getOrPutCell(alloc, x, self.cursor.y);
-                cell.* = self.cursor.pen;
-                cell.char = 0;
-            }
+            const row = self.screen.getRow(self.cursor.y);
+            std.mem.set(Screen.Cell, row[0..self.cursor.x], self.cursor.pen);
         },
 
         else => {
diff --git a/src/terminal/stream.zig b/src/terminal/stream.zig
index 7dcc7e92d..3e6dafcfe 100644
--- a/src/terminal/stream.zig
+++ b/src/terminal/stream.zig
@@ -48,7 +48,7 @@ pub fn Stream(comptime Handler: type) type {
             //log.debug("char: {x}", .{c});
             const actions = self.parser.next(c);
             for (actions) |action_opt| {
-                // if (action_opt) |action| log.info("action: {}", .{action});
+                if (action_opt) |action| log.info("action: {}", .{action});
                 switch (action_opt orelse continue) {
                     .print => |p| if (@hasDecl(T, "print")) try self.handler.print(p),
                     .execute => |code| try self.execute(code),