Wayland support

Add necessary functions for Wayland upwards list mode to work.

lib/renderers/cairo_renderer.h

@@ -314,10 +314,7 @@ bm_cairo_paint(struct cairo *cairo, uint32_t width, uint32_t max_height, struct
     uint32_t page_length = 0;
 
     if (menu->lines_mode == BM_LINES_UP && !menu->fixed_height) {
-        struct cairo_result dummy_result;
-        bm_cairo_draw_line_str(cairo, &paint, &dummy_result, "");
-
-        int32_t new_y_offset = (count < lines ? (lines - count) * result.height : 0);
+        int32_t new_y_offset = (count < lines ? (lines - count) * height : 0);
         bm_menu_set_y_offset(menu, new_y_offset);
     }
 
@@ -330,7 +327,7 @@ bm_cairo_paint(struct cairo *cairo, uint32_t width, uint32_t max_height, struct
         enum bm_color title_bg = (menu->lines_mode == BM_LINES_UP ? BM_COLOR_ITEM_BG : BM_COLOR_TITLE_BG);
         bm_cairo_color_from_menu_color(menu, title_fg, &paint.fg);
         bm_cairo_color_from_menu_color(menu, title_bg, &paint.bg);
-        paint.pos = (struct pos){ result.x_advance + border_size + 4, vpadding + border_size };
+        paint.pos = (struct pos){ border_size + 4, vpadding + border_size };
         paint.box = (struct box){ 4, 16, vpadding, -vpadding, 0, height };
         bm_cairo_draw_line(cairo, &paint, &result, "%s", menu->title);
         title_x = result.x_advance;
@@ -528,14 +525,12 @@ bm_cairo_paint(struct cairo *cairo, uint32_t width, uint32_t max_height, struct
 
     }
 
-    struct cairo_paint pre_up_drawing = paint;  // Some behavior may depend on the previous paint.
-
     if (menu->lines_mode == BM_LINES_UP) {
         if (menu->title) {
             bm_cairo_color_from_menu_color(menu, BM_COLOR_TITLE_FG, &paint.fg);
             bm_cairo_color_from_menu_color(menu, BM_COLOR_TITLE_BG, &paint.bg);
 
-            paint.pos = (struct pos){ border_size, posy + border_size };
+            paint.pos = (struct pos){ border_size + 4, posy + vpadding + border_size };
             paint.box = (struct box){ 4, 16, vpadding, -vpadding, 0, height };
             bm_cairo_draw_line(cairo, &paint, &result, "%s", menu->title);
         }
@@ -570,8 +565,6 @@ bm_cairo_paint(struct cairo *cairo, uint32_t width, uint32_t max_height, struct
         posy += (spacing_y ? spacing_y : result.height);
         out_result->height = posy;
         out_result->displayed++;
-
-        paint = pre_up_drawing;
     }
 
     if (menu->counter) {

lib/renderers/wayland/wayland.c

@@ -397,6 +397,18 @@ set_align(const struct bm_menu *menu, enum bm_align align)
     }
 }
 
+static void
+set_y_offset(const struct bm_menu *menu, int32_t y_offset)
+{
+    struct wayland *wayland = menu->renderer->internal;
+    assert(wayland);
+
+    struct window *window;
+    wl_list_for_each(window, &wayland->windows, link) {
+        bm_wl_window_set_y_offset(window, wayland->display, y_offset);
+    }
+}
+
 static void
 grab_keyboard(const struct bm_menu *menu, bool grab)
 {
@@ -672,6 +684,7 @@ register_renderer(struct render_api *api)
     api->release_touch = release_touch;
     api->render = render;
     api->set_align = set_align;
+    api->set_y_offset = set_y_offset;
     api->set_width = set_width;
     api->grab_keyboard = grab_keyboard;
     api->set_overlap = set_overlap;

lib/renderers/wayland/wayland.h

@@ -128,6 +128,7 @@ struct window {
     uint32_t displayed;
     struct wl_list link;
     enum bm_align align;
+    int32_t y_offset;
     uint32_t align_anchor;
     bool render_pending;
 
@@ -175,6 +176,7 @@ void bm_wl_window_schedule_render(struct window *window);
 void bm_wl_window_render(struct window *window, struct wl_display *display, struct bm_menu *menu);
 void bm_wl_window_set_width(struct window *window, struct wl_display *display, uint32_t margin, float factor);
 void bm_wl_window_set_align(struct window *window, struct wl_display *display, enum bm_align align);
+void bm_wl_window_set_y_offset(struct window *window, struct wl_display *display, int32_t y_offset);
 void bm_wl_window_grab_keyboard(struct window *window, struct wl_display *display, bool grab);
 void bm_wl_window_set_overlap(struct window *window, struct wl_display *display, bool overlap);
 bool bm_wl_window_create(struct window *window, struct wl_display *display, struct wl_shm *shm, struct wl_output *output, struct zwlr_layer_shell_v1 *layer_shell, struct wl_surface *surface);

lib/renderers/wayland/window.c

@@ -354,6 +354,19 @@ bm_wl_window_set_align(struct window *window, struct wl_display *display, enum b
     wl_display_roundtrip(display);
 }
 
+void
+bm_wl_window_set_y_offset(struct window *window, struct wl_display *display, int32_t y_offset)
+{
+    if(window->y_offset == y_offset)
+        return;
+
+    window->y_offset = y_offset;
+
+    zwlr_layer_surface_v1_set_margin(window->layer_surface, window->y_offset, 0, 0, 0);
+    wl_surface_commit(window->surface);
+    wl_display_roundtrip(display);
+}
+
 void
 bm_wl_window_grab_keyboard(struct window *window, struct wl_display *display, bool grab)
 {

lib/renderers/x11/window.c

@@ -251,7 +251,6 @@ bm_x11_window_set_y_offset(struct window *window, int32_t y_offset)
         return;
 
     window->y_offset = y_offset;
-    XMoveWindow(window->display, window->drawable, window->x, window->y + window->y_offset);
 }
 
 void