From e28d05b0ad36242fac4512e29047e3dd8912de3b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kristian=20H=C3=B8gsberg?= <krh@bitplanet.net>
Date: Tue, 20 Sep 2011 21:43:54 -0400
Subject: [PATCH] window.c: Move window items to window.c

---
 clients/desktop-shell.c | 163 +++++++++++-----------------------------
 clients/window.c        | 124 +++++++++++++++++++++++++++++-
 clients/window.h        |  34 ++++++++-
 3 files changed, 197 insertions(+), 124 deletions(-)

diff --git a/clients/desktop-shell.c b/clients/desktop-shell.c
index d7833e55..496d0d18 100644
--- a/clients/desktop-shell.c
+++ b/clients/desktop-shell.c
@@ -46,14 +46,12 @@ struct desktop {
 
 struct panel {
 	struct window *window;
-	struct wl_list item_list;
-	struct panel_item *focus;
 };
 
 struct panel_item {
-	struct wl_list link;
+	struct item *item;
+	struct panel *panel;
 	cairo_surface_t *icon;
-	int x, y, width, height;
 	int pressed;
 	const char *path;
 };
@@ -88,41 +86,38 @@ panel_activate_item(struct panel *panel, struct panel_item *item)
 	}
 }
 
-static struct panel_item *
-panel_find_item(struct panel *panel, int32_t x, int32_t y)
-{
-	struct panel_item *item;
-
-	wl_list_for_each(item, &panel->item_list, link) {
-		if (item->x <= x && x < item->x + item->width &&
-		    item->y <= y && y < item->y + item->height) {
-			return item;
-		}
-	}
-
-	return NULL;
-}
-
 static void
-panel_draw_item(struct panel *panel, cairo_t *cr, struct panel_item *item)
+panel_draw_item(struct item *item, void *data)
 {
-	int x, y;
-
-	if (item->pressed) {
-		x = item->x + 1;
-		y = item->y + 1;
-	} else {
-		x = item->x;
-		y = item->y;
+	cairo_t *cr = data;
+	struct panel_item *pi;
+	int x, y, width, height;
+	double dx, dy;
+
+	pi = item_get_user_data(item);
+	width = cairo_image_surface_get_width(pi->icon);
+	height = cairo_image_surface_get_height(pi->icon);
+	x = 0;
+	y = -height / 2;
+	if (pi->pressed) {
+		x++;
+		y++;
 	}
 
-	cairo_set_source_surface(cr, item->icon, x, y);
+	dx = x;
+	dy = y;
+	cairo_user_to_device(cr, &dx, &dy);
+	item_set_allocation(item, dx, dy, width, height);
+
+	cairo_set_source_surface(cr, pi->icon, x, y);
 	cairo_paint(cr);
 
-	if (panel->focus == item) {
+	if (window_get_focus_item(pi->panel->window) == item) {
 		cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 0.4);
-		cairo_mask_surface(cr, item->icon, x, y);
+		cairo_mask_surface(cr, pi->icon, x, y);
 	}
+
+	cairo_translate(cr, width + 10, 0);
 }
 
 static void
@@ -130,8 +125,6 @@ panel_redraw_handler(struct window *window, void *data)
 {
 	cairo_surface_t *surface;
 	cairo_t *cr;
-	struct panel *panel = window_get_user_data(window);
-	struct panel_item *item;
 
 	window_draw(window);
 	surface = window_get_surface(window);
@@ -141,8 +134,8 @@ panel_redraw_handler(struct window *window, void *data)
 	cairo_paint(cr);
 
 	cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
-	wl_list_for_each(item, &panel->item_list, link)
-		panel_draw_item(panel, cr, item);
+	cairo_translate(cr, 10, 32 / 2);
+	window_for_each_item(window, panel_draw_item, cr);
 
 	cairo_destroy(cr);
 	cairo_surface_destroy(surface);
@@ -150,54 +143,10 @@ panel_redraw_handler(struct window *window, void *data)
 }
 
 static void
-panel_set_focus(struct panel *panel, struct panel_item *focus)
+panel_item_focus_handler(struct window *window,
+			 struct item *focus, void *data)
 {
-	if (focus == panel->focus)
-		return;
-
-	panel->focus = focus;
-	window_schedule_redraw(panel->window);
-}
-
-static int
-panel_enter_handler(struct window *window,
-		    struct input *input, uint32_t time,
-		    int32_t x, int32_t y, void *data)
-{
-	struct panel *panel = data;
-	struct panel_item *item;
-
-	item = panel_find_item(panel, x, y);
-	panel_set_focus(panel, item);
-
-	return POINTER_LEFT_PTR;
-}
-
-static void
-panel_leave_handler(struct window *window,
-		    struct input *input, uint32_t time, void *data)
-{
-	struct panel *panel = data;
-
-	panel_set_focus(panel, NULL);
-}
-
-static int
-panel_motion_handler(struct window *window,
-		     struct input *input, uint32_t time,
-		     int32_t x, int32_t y,
-		     int32_t sx, int32_t sy, void *data)
-{
-	struct panel *panel = data;
-	struct panel_item *item;
-
-	if (panel->focus && panel->focus->pressed)
-		return POINTER_LEFT_PTR;
-
-	item = panel_find_item(panel, sx, sy);
-	panel_set_focus(panel, item);
-
-	return POINTER_LEFT_PTR;
+	window_schedule_redraw(window);
 }
 
 static void
@@ -206,20 +155,15 @@ panel_button_handler(struct window *window,
 		     int button, int state, void *data)
 {
 	struct panel *panel = data;
-	struct panel_item *item;
-	int32_t x, y;
+	struct panel_item *pi;
+	struct item *focus;
 
-	if (panel->focus && button == BTN_LEFT) {
-		panel->focus->pressed = state;
+	focus = window_get_focus_item(panel->window);
+	if (focus && button == BTN_LEFT) {
+		pi = item_get_user_data(focus);
 		window_schedule_redraw(panel->window);
-
-		if (state == 0) {
-			panel_activate_item(panel, panel->focus);
-
-			input_get_position(input, &x, &y);
-			item = panel_find_item(panel, x, y);
-			panel_set_focus(panel, item);
-		}
+		if (state == 0)
+			panel_activate_item(panel, pi);
 	}
 }
 
@@ -230,7 +174,6 @@ panel_create(struct display *display)
 
 	panel = malloc(sizeof *panel);
 	memset(panel, 0, sizeof *panel);
-	wl_list_init(&panel->item_list);
 
 	panel->window = window_create(display, 0, 0);
 
@@ -239,10 +182,8 @@ panel_create(struct display *display)
 	window_set_redraw_handler(panel->window, panel_redraw_handler);
 	window_set_custom(panel->window);
 	window_set_user_data(panel->window, panel);
-	window_set_enter_handler(panel->window, panel_enter_handler);
-	window_set_leave_handler(panel->window, panel_leave_handler);
-	window_set_motion_handler(panel->window, panel_motion_handler);
 	window_set_button_handler(panel->window, panel_button_handler);
+	window_set_item_focus_handler(panel->window, panel_item_focus_handler);
 
 	return panel;
 }
@@ -256,27 +197,8 @@ panel_add_item(struct panel *panel, const char *icon, const char *path)
 	memset(item, 0, sizeof *item);
 	item->icon = cairo_image_surface_create_from_png(icon);
 	item->path = strdup(path);
-	wl_list_insert(panel->item_list.prev, &item->link);
-
-	item->width = cairo_image_surface_get_width(item->icon);
-	item->height = cairo_image_surface_get_height(item->icon);
-}
-
-static void
-panel_allocate(struct panel *panel, int width, int height)
-{
-	struct panel_item *item;
-	int x;
-
-	window_set_child_size(panel->window, width, height);
-	window_schedule_redraw(panel->window);
-
-	x = 10;
-	wl_list_for_each(item, &panel->item_list, link) {
-		item->x = x;
-		item->y = (height - item->height) / 2;
-		x += item->width + 10;
-	}
+	item->panel = panel;
+	window_add_item(panel->window, item);
 }
 
 static void
@@ -324,7 +246,8 @@ desktop_shell_configure(void *data,
 	struct desktop *desktop = data;
 
 	if (surface == window_get_wl_surface(desktop->panel->window)) {
-		panel_allocate(desktop->panel, width, 32);
+		window_set_child_size(desktop->panel->window, width, 32);
+		window_schedule_redraw(desktop->panel->window);
 	} else if (surface == window_get_wl_surface(desktop->background)) {
 		background_draw(desktop->background,
 				width, height, desktop->background_path);
diff --git a/clients/window.c b/clients/window.c
index e7a61ef9..9e92adb9 100644
--- a/clients/window.c
+++ b/clients/window.c
@@ -125,11 +125,22 @@ struct window {
 	window_motion_handler_t motion_handler;
 	window_enter_handler_t enter_handler;
 	window_leave_handler_t leave_handler;
+	window_item_focus_handler_t item_focus_handler;
+
+	struct wl_list item_list;
+	struct item *focus_item;
+	uint32_t item_grab_button;
 
 	void *user_data;
 	struct wl_list link;
 };
 
+struct item {
+	struct wl_list link;
+	struct rectangle allocation;
+	void *user_data;
+};
+
 struct input {
 	struct display *display;
 	struct wl_input_device *input_device;
@@ -949,6 +960,73 @@ window_destroy(struct window *window)
 	free(window);
 }
 
+static struct item *
+window_find_item(struct window *window, int32_t x, int32_t y)
+{
+	struct item *item;
+
+	wl_list_for_each(item, &window->item_list, link) {
+		if (item->allocation.x <= x &&
+		    x < item->allocation.x + item->allocation.width &&
+		    item->allocation.y <= y &&
+		    y < item->allocation.y + item->allocation.height) {
+			return item;
+		}
+	}
+
+	return NULL;
+}
+
+struct item *
+window_add_item(struct window *window, void *data)
+{
+	struct item *item;
+
+	item = malloc(sizeof *item);
+	memset(item, 0, sizeof *item);
+	item->user_data = data;
+	wl_list_insert(window->item_list.prev, &item->link);
+
+	return item;
+}
+
+void
+window_for_each_item(struct window *window, item_func_t func, void *data)
+{
+	struct item *item;
+
+	wl_list_for_each(item, &window->item_list, link)
+		func(item, data);
+}
+
+struct item *
+window_get_focus_item(struct window *window)
+{
+	return window->focus_item;
+}
+
+void
+item_get_allocation(struct item *item, struct rectangle *allocation)
+{
+	*allocation = item->allocation;
+}
+
+void
+item_set_allocation(struct item *item,
+		    int32_t x, int32_t y, int32_t width, int32_t height)
+{
+	item->allocation.x = x;
+	item->allocation.y = y;
+	item->allocation.width = width;
+	item->allocation.height = height;
+}
+
+void *
+item_get_user_data(struct item *item)
+{
+	return item->user_data;
+}
+
 void
 display_flush_cairo_device(struct display *display)
 {
@@ -1078,6 +1156,20 @@ set_pointer_image(struct input *input, uint32_t time, int pointer)
 			       pointer_images[pointer].hotspot_y);
 }
 
+static void
+window_set_focus_item(struct window *window, struct item *focus)
+{
+	void *data;
+
+	if (focus == window->focus_item)
+		return;
+
+	window->focus_item = focus;
+	data = focus ? focus->user_data : NULL;
+	if (window->item_focus_handler)
+		window->item_focus_handler(window, focus, data);
+}
+
 static void
 window_handle_motion(void *data, struct wl_input_device *input_device,
 		     uint32_t time,
@@ -1085,6 +1177,7 @@ window_handle_motion(void *data, struct wl_input_device *input_device,
 {
 	struct input *input = data;
 	struct window *window = input->pointer_focus;
+	struct item *item;
 	int pointer = POINTER_LEFT_PTR;
 
 	input->x = x;
@@ -1092,6 +1185,11 @@ window_handle_motion(void *data, struct wl_input_device *input_device,
 	input->sx = sx;
 	input->sy = sy;
 
+	if (!window->focus_item || !window->item_grab_button) {
+		item = window_find_item(window, sx, sy);
+		window_set_focus_item(window, item);
+	}
+
 	if (window->motion_handler)
 		pointer = (*window->motion_handler)(window, input, time,
 						    x, y, sx, sy,
@@ -1107,8 +1205,12 @@ window_handle_button(void *data,
 {
 	struct input *input = data;
 	struct window *window = input->pointer_focus;
+	struct item *item;
 	int location;
 
+	if (window->focus_item && window->item_grab_button == 0 && state)
+		window->item_grab_button = button;
+
 	location = get_pointer_location(window, input->sx, input->sy);
 
 	if (button == BTN_LEFT && state == 1) {
@@ -1144,6 +1246,13 @@ window_handle_button(void *data,
 						  button, state,
 						  window->user_data);
 	}
+
+	if (window->focus_item &&
+	    window->item_grab_button == button && !state) {
+		window->item_grab_button = 0;
+		item = window_find_item(window, input->sx, input->sy);
+		window_set_focus_item(window, item);
+	}
 }
 
 static void
@@ -1184,10 +1293,13 @@ window_handle_pointer_focus(void *data,
 {
 	struct input *input = data;
 	struct window *window;
+	struct item *item;
 	int pointer;
 
 	window = input->pointer_focus;
 	if (window && window->surface != surface) {
+		window_set_focus_item(window, NULL);
+
 		if (window->leave_handler)
 			window->leave_handler(window, input,
 					      time, window->user_data);
@@ -1210,8 +1322,10 @@ window_handle_pointer_focus(void *data,
 							time, sx, sy,
 							window->user_data);
 
-		set_pointer_image(input, time, pointer);
+		item = window_find_item(window, x, y);
+		window_set_focus_item(window, item);
 
+		set_pointer_image(input, time, pointer);
 	}
 }
 
@@ -1503,6 +1617,13 @@ window_set_keyboard_focus_handler(struct window *window,
 	window->keyboard_focus_handler = handler;
 }
 
+void
+window_set_item_focus_handler(struct window *window,
+			      window_item_focus_handler_t handler)
+{
+	window->item_focus_handler = handler;
+}
+
 void
 window_set_transparent(struct window *window, int transparent)
 {
@@ -1562,6 +1683,7 @@ window_create_internal(struct display *display, struct window *parent,
 	window->margin = 16;
 	window->decoration = 1;
 	window->transparent = 1;
+	wl_list_init(&window->item_list);
 
 	if (display->dpy)
 #ifdef HAVE_CAIRO_EGL
diff --git a/clients/window.h b/clients/window.h
index df819bf5..24091975 100644
--- a/clients/window.h
+++ b/clients/window.h
@@ -29,6 +29,9 @@
 #include <cairo.h>
 
 struct window;
+struct item;
+struct display;
+struct input;
 
 struct task {
 	void (*run)(struct task *task, uint32_t events);
@@ -42,9 +45,6 @@ struct rectangle {
 	int32_t height;
 };
 
-struct display;
-struct input;
-
 struct display *
 display_create(int *argc, char **argv[], const GOptionEntry *option_entries);
 
@@ -156,6 +156,9 @@ typedef int (*window_motion_handler_t)(struct window *window,
 				       int32_t x, int32_t y,
 				       int32_t sx, int32_t sy, void *data);
 
+typedef void (*window_item_focus_handler_t)(struct window *window,
+					    struct item *focus, void *data);
+
 struct window *
 window_create(struct display *display, int32_t width, int32_t height);
 struct window *
@@ -165,6 +168,17 @@ window_create_transient(struct display *display, struct window *parent,
 void
 window_destroy(struct window *window);
 
+struct item *
+window_add_item(struct window *window, void *data);
+
+typedef void (*item_func_t)(struct item *item, void *data);
+
+void
+window_for_each_item(struct window *window, item_func_t func, void *data);
+
+struct item *
+window_get_focus_item(struct window *window);
+
 void
 window_move(struct window *window, struct input *input, uint32_t time);
 
@@ -264,6 +278,10 @@ void
 window_set_keyboard_focus_handler(struct window *window,
 				  window_keyboard_focus_handler_t handler);
 
+void
+window_set_item_focus_handler(struct window *window,
+			      window_item_focus_handler_t handler);
+
 void
 window_set_title(struct window *window, const char *title);
 
@@ -277,6 +295,16 @@ void
 window_activate_drag(struct wl_drag *drag, struct window *window,
 		     struct input *input, uint32_t time);
 
+void
+item_get_allocation(struct item *item, struct rectangle *allocation);
+
+void
+item_set_allocation(struct item *item,
+		    int32_t x, int32_t y, int32_t width, int32_t height);
+
+void *
+item_get_user_data(struct item *item);
+
 void
 input_get_position(struct input *input, int32_t *x, int32_t *y);