add browser_window_redraw() method to make content_redraw calls from frontends common RISC OS, atari, amiga and beos have not been updated

svn path=/trunk/netsurf/; revision=11640

2 files changed, 54 insertions, 0 deletions

diff --git a/desktop/browser.c b/desktop/browser.c
index d80886556..1ffc12e29 100644
--- a/desktop/browser.c
+++ b/desktop/browser.c
@@ -51,6 +51,8 @@
 #include "desktop/options.h"
 #include "desktop/selection.h"
 #include "desktop/textinput.h"
+#include "desktop/plotters.h"
+
 #include "render/form.h"
 #include "render/html.h"
 #include "render/textplain.h"
@@ -86,6 +88,30 @@ static void browser_window_find_target_internal(struct browser_window *bw,
 		const char *target, int depth, struct browser_window *page,
 		int *rdepth, struct browser_window **bw_target);
 
+/* exported interface, documented in browser.h */
+bool browser_window_redraw(struct browser_window *bw, 
+			   int x, int y,
+			   int width, int height,
+			   int clip_x0, int clip_y0, 
+			   int clip_x1, int clip_y1)
+{
+	if (bw == NULL) {
+		LOG(("NULL browser window"));
+		return false;
+	}
+
+	plot.clip(clip_x0, clip_y0, clip_x1, clip_y1);
+
+	if (bw->current_content == NULL) {
+		return plot.rectangle(clip_x0, clip_y0, clip_x1, clip_y1, plot_style_fill_white);
+
+	}
+ 
+	return content_redraw(bw->current_content, x, y, width, height,
+			clip_x0, clip_y0, clip_x1, clip_y1,
+			bw->scale, 0xFFFFFF);	
+}
+
 /**
  * Create and open a new browser window with the given page.
  *
diff --git a/desktop/browser.h b/desktop/browser.h
index c0a738a6e..2c16c9732 100644
--- a/desktop/browser.h
+++ b/desktop/browser.h
@@ -251,6 +251,34 @@ bool browser_window_forward_available(struct browser_window *bw);
 bool browser_window_reload_available(struct browser_window *bw);
 bool browser_window_stop_available(struct browser_window *bw);
 
+/**
+ * Redraw an area of a window
+ *
+ * Calls the redraw function for the content, 
+ *
+ * \param  bw		     The window to redraw
+ * \param  x		     coordinate for top-left of redraw
+ * \param  y		     coordinate for top-left of redraw
+ * \param  width	     available width (not used for HTML redraw)
+ * \param  height	     available height (not used for HTML redraw)
+ * \param  clip_x0	     clip rectangle left
+ * \param  clip_y0	     clip rectangle top
+ * \param  clip_x1	     clip rectangle right
+ * \param  clip_y1	     clip rectangle bottom
+ * \return true if successful, false otherwise
+ *
+ * x, y and clip_* are coordinates from the top left of the canvas area.
+ *
+ * The top left corner of the clip rectangle is (clip_x0, clip_y0) and
+ * the bottom right corner of the clip rectangle is (clip_x1, clip_y1).
+ * Units for x, y and clip_* are pixels.
+ */
+bool browser_window_redraw(struct browser_window *bw, 
+			   int x, int y,
+			   int width, int height,
+			   int clip_x0, int clip_y0, 
+			   int clip_x1, int clip_y1);
+
 /* In platform specific hotlist.c. */
 void hotlist_visited(struct hlcache_handle *c);