From 423f0f1e7068ba4874435c02e31b054e62ae7966 Mon Sep 17 00:00:00 2001
From: James Bursa <james@netsurf-browser.org>
Date: Sun, 21 Mar 2004 13:55:51 +0000
Subject: [project @ 2004-03-21 13:55:51 by bursa] Implement
 gui_window_update_box() and use in response to CONTENT_MSG_REDRAW.

svn path=/import/netsurf/; revision=644
---
 desktop/browser.c | 12 +++++++++++-
 desktop/gui.h     |  1 +
 render/html.c     |  3 +--
 riscos/window.c   | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 62 insertions(+), 3 deletions(-)

diff --git a/desktop/browser.c b/desktop/browser.c
index 64edaf728..337d6f0df 100644
--- a/desktop/browser.c
+++ b/desktop/browser.c
@@ -199,6 +199,7 @@ void browser_window_callback(content_msg msg, struct content *c,
 	     void *p1, void *p2, const char *error)
 {
 	struct browser_window *bw = p1;
+	struct box *box;
 	char status[40];
 
 	if (c->type == CONTENT_OTHER) {
@@ -277,7 +278,16 @@ void browser_window_callback(content_msg msg, struct content *c,
 			break;
 
 		case CONTENT_MSG_REDRAW:
-			gui_window_redraw_window(bw->window);
+			/* error actually holds the box */
+			box = (struct box *) error;
+			if (box) {
+				int x, y;
+				box_coords(box, &x, &y);
+				gui_window_update_box(bw->window, x, y,
+						x + box->width,
+						y + box->height);
+			} else
+				gui_window_redraw_window(bw->window);
 			break;
 
 #ifdef WITH_AUTH
diff --git a/desktop/gui.h b/desktop/gui.h
index 3554a87ee..62dcf27a7 100644
--- a/desktop/gui.h
+++ b/desktop/gui.h
@@ -28,6 +28,7 @@ void gui_window_hide(gui_window* g);
 void gui_window_redraw(gui_window* g, unsigned long x0, unsigned long y0,
 		unsigned long x1, unsigned long y1);
 void gui_window_redraw_window(gui_window* g);
+void gui_window_update_box(gui_window *g, int x0, int y0, int x1, int y1);
 void gui_window_set_scroll(gui_window* g, unsigned long sx, unsigned long sy);
 unsigned long gui_window_get_width(gui_window* g);
 void gui_window_set_extent(gui_window* g, unsigned long width, unsigned long height);
diff --git a/render/html.c b/render/html.c
index 4e095d408..e028e523d 100644
--- a/render/html.c
+++ b/render/html.c
@@ -642,8 +642,7 @@ void html_object_callback(content_msg msg, struct content *object,
 			break;
 
 		case CONTENT_MSG_REDRAW:
-			/** \todo  send up box coordinates */
-			content_broadcast(c, CONTENT_MSG_REDRAW, 0);
+			content_broadcast(c, CONTENT_MSG_REDRAW, box);
 			break;
 
 #ifdef WITH_AUTH
diff --git a/riscos/window.c b/riscos/window.c
index 2196fa054..a10114d6c 100644
--- a/riscos/window.c
+++ b/riscos/window.c
@@ -254,6 +254,55 @@ void ro_gui_window_redraw(gui_window* g, wimp_draw* redraw)
   }
 }
 
+
+/**
+ * Redraw an area of a window.
+ *
+ * \param  g   gui_window
+ * \param  x0  minimum x
+ * \param  y0  minimum y
+ * \param  x1  maximum x
+ * \param  y1  maximum y
+ */
+
+void gui_window_update_box(gui_window *g, int x0, int y0, int x1, int y1)
+{
+	struct content *c = g->data.browser.bw->current_content;
+	osbool more;
+	os_error *error;
+	wimp_draw update;
+
+	update.w = g->window;
+	update.box.x0 = x0 * 2;
+	update.box.y0 = -y1 * 2;
+	update.box.x1 = x1 * 2;
+	update.box.y1 = -y0 * 2;
+	error = xwimp_update_window(&update, &more);
+	if (error) {
+		LOG(("xwimp_update_window: 0x%x: %s",
+				error->errnum, error->errmess));
+		return;
+	}
+
+	while (more) {
+		content_redraw(c,
+				update.box.x0 - update.xscroll,
+				update.box.y1 - update.yscroll,
+				c->width * 2, c->height * 2,
+				update.clip.x0, update.clip.y0,
+				update.clip.x1 - 1, update.clip.y1 - 1,
+				g->scale);
+
+		error = xwimp_get_rectangle(&update, &more);
+		if (error) {
+			LOG(("xwimp_get_rectangle: 0x%x: %s",
+					error->errnum, error->errmess));
+			return;
+		}
+	}
+}
+
+
 void gui_window_set_scroll(gui_window* g, unsigned long sx, unsigned long sy)
 {
   wimp_window_state state;
-- 
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