From a20e5c3a18721850d7937cf9b56b2ca29f98528f Mon Sep 17 00:00:00 2001
From: David Herrmann <dh.herrmann@googlemail.com>
Date: Wed, 21 Dec 2011 16:39:51 +0100
Subject: [PATCH] console: allow resizing the console

Forward resizing requests to the buffer but correctly update our size cache and
the cursor position.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
---
 src/console.c | 43 +++++++++++++++++++++++++++++++++++++++++--
 src/console.h |  5 +++++
 2 files changed, 46 insertions(+), 2 deletions(-)

diff --git a/src/console.c b/src/console.c
index 7533215..93f19ed 100644
--- a/src/console.c
+++ b/src/console.c
@@ -157,6 +157,45 @@ void kmscon_console_unref(struct kmscon_console *con)
 	free(con);
 }
 
+unsigned int kmscon_console_get_width(struct kmscon_console *con)
+{
+	if (!con)
+		return 0;
+
+	return con->cells_x;
+}
+
+unsigned int kmscon_console_get_height(struct kmscon_console *con)
+{
+	if (!con)
+		return 0;
+
+	return con->cells_y;
+}
+
+int kmscon_console_resize(struct kmscon_console *con, unsigned int x,
+								unsigned int y)
+{
+	int ret;
+
+	if (!con)
+		return -EINVAL;
+
+	ret = kmscon_buffer_resize(con->cells, x, y);
+	if (ret)
+		return ret;
+
+	con->cells_x = kmscon_buffer_get_width(con->cells);
+	con->cells_y = kmscon_buffer_get_height(con->cells);
+
+	if (con->cursor_x > con->cells_x)
+		con->cursor_x = con->cells_x;
+	if (con->cursor_y > con->cells_y)
+		con->cursor_y = con->cells_y;
+
+	return 0;
+}
+
 /*
  * This resets the resolution used for drawing operations. It is recommended to
  * set this to the size of your framebuffer, however, you can set this to
@@ -302,10 +341,10 @@ void kmscon_console_write(struct kmscon_console *con,
 	if (!con)
 		return;
 
-	if (con->cursor_x == con->cells_x) {
+	if (con->cursor_x >= con->cells_x) {
 		con->cursor_x = 0;
 		con->cursor_y++;
-		if (con->cursor_y == con->cells_y) {
+		if (con->cursor_y >= con->cells_y) {
 			con->cursor_y--;
 			kmscon_buffer_rotate(con->cells);
 		}
diff --git a/src/console.h b/src/console.h
index 2ddb9b8..e5c62df 100644
--- a/src/console.h
+++ b/src/console.h
@@ -92,6 +92,11 @@ int kmscon_console_new(struct kmscon_console **out);
 void kmscon_console_ref(struct kmscon_console *con);
 void kmscon_console_unref(struct kmscon_console *con);
 
+unsigned int kmscon_console_get_width(struct kmscon_console *con);
+unsigned int kmscon_console_get_height(struct kmscon_console *con);
+int kmscon_console_resize(struct kmscon_console *con, unsigned int x,
+							unsigned int y);
+
 int kmscon_console_set_res(struct kmscon_console *con, uint32_t x, uint32_t y);
 void kmscon_console_draw(struct kmscon_console *con);
 void kmscon_console_map(struct kmscon_console *con);