diff options
Diffstat (limited to 'atari/browser.h')
| -rwxr-xr-x | atari/browser.h | 76 |
1 files changed, 75 insertions, 1 deletions
diff --git a/atari/browser.h b/atari/browser.h index 44d9ac8e1..c5923a125 100755 --- a/atari/browser.h +++ b/atari/browser.h @@ -24,7 +24,19 @@ which cosnist mainly of an WinDom COMPONENT.
*/
-#define BROWSER_SCROLL_SVAL 64 /* The small scroll inc. value */
+/*
+ BROWSER_SCROLL_SVAL
+ The small scroll inc. value (used by scroll-wheel, arrow click):
+*/
+#define BROWSER_SCROLL_SVAL 64
+
+/*
+ MAX_REDRW_SLOTS
+ This is the number of redraw requests that an browser window can queue.
+ If a redraw is scheduled and all slots are used, the rectangle will
+ be merged to one of the existing slots.
+ */
+#define MAX_REDRW_SLOTS 32
enum browser_type
{
@@ -42,6 +54,56 @@ enum browser_rect BR_VSLIDER = 4
};
+
+/*
+ This struct contains info of current browser viewport scroll
+ and the scroll which is requested. If a scroll is requested,
+ the field required is set to true.
+*/
+struct s_scroll_info
+{
+ POINT requested;
+ POINT current;
+ bool required;
+};
+
+/*
+ This struct holds information of the cursor within the browser
+ viewport.
+*/
+struct s_caret
+{
+ GRECT requested;
+ GRECT current;
+ bool redraw;
+};
+
+/*
+ This struct holds scheduled redraw requests.
+*/
+struct s_browser_redrw_info
+{
+ BBOX areas[MAX_REDRW_SLOTS];
+ short areas_used;
+ BBOX area; /* used for clipping of content redraw */
+};
+
+/*
+ This is the actual browser widget, containings GUI elements and
+ the current state of the browser widget.
+*/
+struct s_browser
+{
+ int type;
+ COMPONENT * comp;
+ WINDOW * compwin;
+ struct browser_window * bw;
+ struct s_scroll_info scroll;
+ struct s_browser_redrw_info redraw;
+ struct s_caret caret;
+ bool attached;
+};
+
struct s_browser * browser_create( struct gui_window * gw, struct browser_window * clone, struct browser_window *bw, enum browser_type, int lt, int w, int flex );
bool browser_destroy( struct s_browser * b );
void browser_get_rect( struct gui_window * gw, enum browser_rect type, LGRECT * out);
@@ -53,6 +115,18 @@ bool browser_attach_frame( struct gui_window * container, struct gui_window * fr struct gui_window * browser_find_root( struct gui_window * gw );
static void browser_process_scroll( struct gui_window * gw, LGRECT bwrect );
bool browser_redraw_required( struct gui_window * gw);
+
+/*
+ This queues an redraw to one of the slots.
+ The following strategy is used:
+ 1. It checks if the rectangle to be scheduled is within one of the
+ already queued bboxes. If yes, it will return.
+ 2. It checks for an intersection, and it will merge the rectangle to
+ already queued rectangle where it fits best.
+ 3. it tries to put the rectangle into one available slot.
+ 4. if no slot is available, it will search for the nearest rectangle
+ and summarize it within that slot.
+*/
void browser_redraw_caret( struct gui_window * gw, GRECT * area );
static void browser_redraw_content( struct gui_window * gw, int xoff, int yoff );
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