Move zoom code to its own file.
diff --git a/src/compositor.c b/src/compositor.c
index e550926..d40a878 100644
--- a/src/compositor.c
+++ b/src/compositor.c
@@ -2768,230 +2768,6 @@
 }
 
 WL_EXPORT void
-weston_text_cursor_position_notify(struct weston_surface *surface,
-						wl_fixed_t cur_pos_x,
-						wl_fixed_t cur_pos_y)
-{
-	struct weston_output *output;
-	wl_fixed_t global_x, global_y;
-
-	weston_surface_to_global_fixed(surface, cur_pos_x, cur_pos_y,
-						&global_x, &global_y);
-
-	wl_list_for_each(output, &surface->compositor->output_list, link)
-		if (output->zoom.active &&
-		    pixman_region32_contains_point(&output->region,
-						wl_fixed_to_int(global_x),
-						wl_fixed_to_int(global_y),
-						NULL)) {
-			output->zoom.text_cursor.x = global_x;
-			output->zoom.text_cursor.y = global_y;
-			weston_output_update_zoom(output, ZOOM_FOCUS_TEXT);
-		}
-}
-
-static void
-weston_zoom_frame_z(struct weston_animation *animation,
-		struct weston_output *output, uint32_t msecs)
-{
-	if (animation->frame_counter <= 1)
-		output->zoom.spring_z.timestamp = msecs;
-
-	weston_spring_update(&output->zoom.spring_z, msecs);
-
-	if (output->zoom.spring_z.current > output->zoom.max_level)
-		output->zoom.spring_z.current = output->zoom.max_level;
-	else if (output->zoom.spring_z.current < 0.0)
-		output->zoom.spring_z.current = 0.0;
-
-	if (weston_spring_done(&output->zoom.spring_z)) {
-		if (output->zoom.level <= 0.0)
-			output->zoom.active = 0;
-		output->zoom.spring_z.current = output->zoom.level;
-		wl_list_remove(&animation->link);
-		wl_list_init(&animation->link);
-	}
-
-	output->dirty = 1;
-	weston_output_damage(output);
-}
-
-static void
-weston_zoom_frame_xy(struct weston_animation *animation,
-		struct weston_output *output, uint32_t msecs)
-{
-	wl_fixed_t x, y;
-	if (animation->frame_counter <= 1)
-		output->zoom.spring_xy.timestamp = msecs;
-
-	weston_spring_update(&output->zoom.spring_xy, msecs);
-
-	x = output->zoom.from.x - ((output->zoom.from.x - output->zoom.to.x) *
-						output->zoom.spring_xy.current);
-	y = output->zoom.from.y - ((output->zoom.from.y - output->zoom.to.y) *
-						output->zoom.spring_xy.current);
-
-	output->zoom.current.x = x;
-	output->zoom.current.y = y;
-
-	if (weston_spring_done(&output->zoom.spring_xy)) {
-		output->zoom.spring_xy.current = output->zoom.spring_xy.target;
-		output->zoom.current.x =
-				(output->zoom.type == ZOOM_FOCUS_POINTER) ?
-					output->compositor->seat->pointer.x :
-					output->zoom.text_cursor.x;
-		output->zoom.current.y =
-				(output->zoom.type == ZOOM_FOCUS_POINTER) ?
-					output->compositor->seat->pointer.y :
-					output->zoom.text_cursor.y;
-		wl_list_remove(&animation->link);
-		wl_list_init(&animation->link);
-	}
-
-	output->dirty = 1;
-	weston_output_damage(output);
-}
-
-static void
-zoom_area_center_from_pointer(struct weston_output *output,
-				wl_fixed_t *x, wl_fixed_t *y)
-{
-	float level = output->zoom.spring_z.current;
-	wl_fixed_t offset_x = wl_fixed_from_int(output->x);
-	wl_fixed_t offset_y = wl_fixed_from_int(output->y);
-	wl_fixed_t w = wl_fixed_from_int(output->current->width);
-	wl_fixed_t h = wl_fixed_from_int(output->current->height);
-
-	*x -= ((((*x - offset_x) / (float) w) - 0.5) * (w * (1.0 - level)));
-	*y -= ((((*y - offset_y) / (float) h) - 0.5) * (h * (1.0 - level)));
-}
-
-static void
-weston_output_update_zoom_transform(struct weston_output *output)
-{
-	uint32_t type = output->zoom.type;
-	float global_x, global_y;
-	wl_fixed_t x = output->zoom.current.x;
-	wl_fixed_t y = output->zoom.current.y;
-	float trans_min, trans_max;
-	float ratio, level;
-
-	level = output->zoom.spring_z.current;
-	ratio = 1 / level;
-
-	if (!output->zoom.active || level > output->zoom.max_level)
-		return;
-
-	if (type == ZOOM_FOCUS_POINTER &&
-			wl_list_empty(&output->zoom.animation_xy.link))
-		zoom_area_center_from_pointer(output, &x, &y);
-
-	global_x = wl_fixed_to_double(x);
-	global_y = wl_fixed_to_double(y);
-
-	output->zoom.trans_x =
-		((((global_x - output->x) / output->current->width) *
-		(level * 2)) - level) * ratio;
-	output->zoom.trans_y =
-		((((global_y - output->y) / output->current->height) *
-		(level * 2)) - level) * ratio;
-
-	trans_max = level * 2 - level;
-	trans_min = -trans_max;
-
-	/* Clip zoom area to output */
-	if (output->zoom.trans_x > trans_max)
-		output->zoom.trans_x = trans_max;
-	else if (output->zoom.trans_x < trans_min)
-		output->zoom.trans_x = trans_min;
-	if (output->zoom.trans_y > trans_max)
-		output->zoom.trans_y = trans_max;
-	else if (output->zoom.trans_y < trans_min)
-		output->zoom.trans_y = trans_min;
-}
-
-static void
-weston_zoom_transition(struct weston_output *output, uint32_t type,
-						wl_fixed_t x, wl_fixed_t y)
-{
-	if (output->zoom.type != type) {
-		/* Set from/to points and start animation */
-		output->zoom.spring_xy.current = 0.0;
-		output->zoom.spring_xy.previous = 0.0;
-		output->zoom.spring_xy.target = 1.0;
-
-		if (wl_list_empty(&output->zoom.animation_xy.link)) {
-			output->zoom.animation_xy.frame_counter = 0;
-			wl_list_insert(output->animation_list.prev,
-				&output->zoom.animation_xy.link);
-
-			output->zoom.from.x = (type == ZOOM_FOCUS_TEXT) ?
-						x : output->zoom.text_cursor.x;
-			output->zoom.from.y = (type == ZOOM_FOCUS_TEXT) ?
-						y : output->zoom.text_cursor.y;
-		} else {
-			output->zoom.from.x = output->zoom.current.x;
-			output->zoom.from.y = output->zoom.current.y;
-		}
-
-		output->zoom.to.x = (type == ZOOM_FOCUS_POINTER) ?
-						x : output->zoom.text_cursor.x;
-		output->zoom.to.y = (type == ZOOM_FOCUS_POINTER) ?
-						y : output->zoom.text_cursor.y;
-		output->zoom.current.x = output->zoom.from.x;
-		output->zoom.current.y = output->zoom.from.y;
-
-		output->zoom.type = type;
-	}
-
-	if (output->zoom.level != output->zoom.spring_z.current) {
-		output->zoom.spring_z.target = output->zoom.level;
-		if (wl_list_empty(&output->zoom.animation_z.link)) {
-			output->zoom.animation_z.frame_counter = 0;
-			wl_list_insert(output->animation_list.prev,
-				&output->zoom.animation_z.link);
-		}
-	}
-
-	output->dirty = 1;
-	weston_output_damage(output);
-}
-
-WL_EXPORT void
-weston_output_update_zoom(struct weston_output *output, uint32_t type)
-{
-	wl_fixed_t x = output->compositor->seat->pointer.x;
-	wl_fixed_t y = output->compositor->seat->pointer.y;
-
-	zoom_area_center_from_pointer(output, &x, &y);
-
-	if (type == ZOOM_FOCUS_POINTER) {
-		if (wl_list_empty(&output->zoom.animation_xy.link)) {
-			output->zoom.current.x =
-					output->compositor->seat->pointer.x;
-			output->zoom.current.y =
-					output->compositor->seat->pointer.y;
-		} else {
-			output->zoom.to.x = x;
-			output->zoom.to.y = y;
-		}
-	}
-
-	if (type == ZOOM_FOCUS_TEXT) {
-		if (wl_list_empty(&output->zoom.animation_xy.link)) {
-			output->zoom.current.x = output->zoom.text_cursor.x;
-			output->zoom.current.y = output->zoom.text_cursor.y;
-		} else {
-			output->zoom.to.x = output->zoom.text_cursor.x;
-			output->zoom.to.y = output->zoom.text_cursor.y;
-		}
-	}
-
-	weston_zoom_transition(output, type, x, y);
-	weston_output_update_zoom_transform(output);
-}
-
-WL_EXPORT void
 weston_output_update_matrix(struct weston_output *output)
 {
 	int flip;
@@ -3052,21 +2828,7 @@
 	output->dirty = 1;
 	wl_list_init(&output->read_pixels_list);
 
-	output->zoom.active = 0;
-	output->zoom.increment = 0.07;
-	output->zoom.max_level = 0.95;
-	output->zoom.level = 0.0;
-	output->zoom.trans_x = 0.0;
-	output->zoom.trans_y = 0.0;
-	output->zoom.type = ZOOM_FOCUS_POINTER;
-	weston_spring_init(&output->zoom.spring_z, 250.0, 0.0, 0.0);
-	output->zoom.spring_z.friction = 1000;
-	output->zoom.animation_z.frame = weston_zoom_frame_z;
-	wl_list_init(&output->zoom.animation_z.link);
-	weston_spring_init(&output->zoom.spring_xy, 250.0, 0.0, 0.0);
-	output->zoom.spring_xy.friction = 1000;
-	output->zoom.animation_xy.frame = weston_zoom_frame_xy;
-	wl_list_init(&output->zoom.animation_xy.link);
+	weston_output_init_zoom(output);
 
 	output->flags = flags;
 	weston_output_move(output, x, y);