Render close, iconify and maximize buttons

README.md

@@ -9,14 +9,14 @@ It is in early development and has the following aims:
 - Where practicable, use other software to show wall-paper, take screenshots,
   and so on.
 
-[Dependencies](#dependencies)
-[Roadmap](#roadmap)
-[Inspiration](#inspiration)
-[Design](#design)
-[Configuration](#configuration)
-[Integration](#integration)
-[Build](#build)
-[Debug](#debug)
+- [Dependencies](#dependencies)
+- [Roadmap](#roadmap)
+- [Inspiration](#inspiration)
+- [Design](#design)
+- [Configuration](#configuration)
+- [Integration](#integration)
+- [Build](#build)
+- [Debug](#debug)
 
 ## Dependencies
 
@@ -29,9 +29,8 @@ libxml2, glib-2.0, cairo and pango.
 - [x] Parse [rc.xml](data/rc.xml)
 - [x] Parse [themerc](data/themerc)
 - [x] Read xbm icons
-- [ ] Add maximize, minimize, close buttons
+- [x] Add maximize, minimize, close buttons
 - [ ] Add grip
-- [ ] Create `view_impl` starting with .configure
 - [ ] Support layer-shell background (e.g. using swaybg)
 - [ ] Draw better alt-tab rectangle
 - [ ] Try restarting and consider catching SIGHUP for --reconfigure

include/labwc.h

@@ -34,8 +34,6 @@
 #define XCURSOR_DEFAULT "left_ptr"
 #define XCURSOR_SIZE 24
 #define XCURSOR_MOVE "grabbing"
-#define XWL_TITLEBAR_HEIGHT (10)
-#define XWL_WINDOW_BORDER (3)
 
 enum cursor_mode {
 	LAB_CURSOR_PASSTHROUGH,
@@ -93,7 +91,9 @@ struct output {
 enum view_type { LAB_XDG_SHELL_VIEW, LAB_XWAYLAND_VIEW };
 
 enum deco_part {
-	LAB_DECO_ICON_CLOSE = 0,
+	LAB_DECO_BUTTON_CLOSE = 0,
+	LAB_DECO_BUTTON_MAXIMIZE,
+	LAB_DECO_BUTTON_ICONIFY,
 	LAB_DECO_PART_TITLE,
 	LAB_DECO_PART_TOP,
 	LAB_DECO_PART_RIGHT,

include/theme.h

@@ -15,6 +15,8 @@ struct theme {
 	float window_active_handle_bg_color[4];
 	float window_inactive_title_bg_color[4];
 	struct wlr_texture *xbm_close;
+	struct wlr_texture *xbm_maximize;
+	struct wlr_texture *xbm_iconify;
 };
 
 extern struct theme theme;

include/theme/xbm/parse.h

@@ -22,4 +22,6 @@ struct pixmap {
  */
 struct pixmap xbm_create_pixmap(struct token *tokens);
 
+struct pixmap xbm_create_pixmap_builtin(const char *button);
+
 #endif /* PARSE_H */

include/theme/xbm/tokenize.h

@@ -18,6 +18,7 @@ enum token_type {
 #define MAX_TOKEN_SIZE (256)
 struct token {
 	char name[MAX_TOKEN_SIZE];
+	int value;
 	size_t pos;
 	enum token_type type;
 };

src/deco.c

@@ -5,64 +5,84 @@
  */
 
 #include "labwc.h"
+#include "theme.h"
+
+/* Based on expected font height of Sans 8 */
+#define TITLE_HEIGHT (14)
+#define BORDER_WIDTH (1)
 
 struct wlr_box deco_max_extents(struct view *view)
 {
 	struct wlr_box box = {
-		.x = view->x - XWL_WINDOW_BORDER,
-		.y = view->y - XWL_TITLEBAR_HEIGHT - XWL_WINDOW_BORDER,
-		.width = view->surface->current.width + 2 * XWL_WINDOW_BORDER,
-		.height = view->surface->current.height + XWL_TITLEBAR_HEIGHT +
-			  2 * XWL_WINDOW_BORDER,
+		.x = view->x - BORDER_WIDTH,
+		.y = view->y - TITLE_HEIGHT - BORDER_WIDTH,
+		.width = view->surface->current.width + 2 * BORDER_WIDTH,
+		.height = view->surface->current.height + TITLE_HEIGHT +
+			  2 * BORDER_WIDTH,
 	};
 	return box;
 }
 
 struct wlr_box deco_box(struct view *view, enum deco_part deco_part)
 {
+	int margin;
+
 	struct wlr_box box = { .x = 0, .y = 0, .width = 0, .height = 0 };
 	if (!view || !view->surface)
 		return box;
 	switch (deco_part) {
-	case LAB_DECO_ICON_CLOSE:
-		box.x = view->x + view->surface->current.width - 8 - 1;
-		box.y = view->y - XWL_TITLEBAR_HEIGHT + 1;
-		box.width = 8;
-		box.height = 8;
+	case LAB_DECO_BUTTON_CLOSE:
+		wlr_texture_get_size(theme.xbm_close, &box.width, &box.height);
+		margin = (TITLE_HEIGHT - box.height) / 2;
+		box.x = view->x + view->surface->current.width + margin -
+			TITLE_HEIGHT;
+		box.y = view->y - TITLE_HEIGHT + margin;
+		break;
+	case LAB_DECO_BUTTON_MAXIMIZE:
+		wlr_texture_get_size(theme.xbm_maximize, &box.width,
+				     &box.height);
+		margin = (TITLE_HEIGHT - box.height) / 2;
+		box.x = view->x + view->surface->current.width + margin -
+			TITLE_HEIGHT * 2;
+		box.y = view->y - TITLE_HEIGHT + margin;
+		break;
+	case LAB_DECO_BUTTON_ICONIFY:
+		wlr_texture_get_size(theme.xbm_iconify, &box.width,
+				     &box.height);
+		margin = (TITLE_HEIGHT - box.height) / 2;
+		box.x = view->x + view->surface->current.width + margin -
+			TITLE_HEIGHT * 3;
+		box.y = view->y - TITLE_HEIGHT + margin;
 		break;
 	case LAB_DECO_PART_TITLE:
 		box.x = view->x;
-		box.y = view->y - XWL_TITLEBAR_HEIGHT;
+		box.y = view->y - TITLE_HEIGHT;
 		box.width = view->surface->current.width;
-		box.height = XWL_TITLEBAR_HEIGHT;
+		box.height = TITLE_HEIGHT;
 		break;
 	case LAB_DECO_PART_TOP:
-		box.x = view->x - XWL_WINDOW_BORDER;
-		box.y = view->y - XWL_TITLEBAR_HEIGHT - XWL_WINDOW_BORDER;
-		box.width =
-			view->surface->current.width + 2 * XWL_WINDOW_BORDER;
-		box.height = XWL_WINDOW_BORDER;
+		box.x = view->x - BORDER_WIDTH;
+		box.y = view->y - TITLE_HEIGHT - BORDER_WIDTH;
+		box.width = view->surface->current.width + 2 * BORDER_WIDTH;
+		box.height = BORDER_WIDTH;
 		break;
 	case LAB_DECO_PART_RIGHT:
 		box.x = view->x + view->surface->current.width;
-		box.y = view->y - XWL_TITLEBAR_HEIGHT;
-		box.width = XWL_WINDOW_BORDER;
-		box.height =
-			view->surface->current.height + XWL_TITLEBAR_HEIGHT;
+		box.y = view->y - TITLE_HEIGHT;
+		box.width = BORDER_WIDTH;
+		box.height = view->surface->current.height + TITLE_HEIGHT;
 		break;
 	case LAB_DECO_PART_BOTTOM:
-		box.x = view->x - XWL_WINDOW_BORDER;
+		box.x = view->x - BORDER_WIDTH;
 		box.y = view->y + view->surface->current.height;
-		box.width =
-			view->surface->current.width + 2 * XWL_WINDOW_BORDER;
-		box.height = +XWL_WINDOW_BORDER;
+		box.width = view->surface->current.width + 2 * BORDER_WIDTH;
+		box.height = +BORDER_WIDTH;
 		break;
 	case LAB_DECO_PART_LEFT:
-		box.x = view->x - XWL_WINDOW_BORDER;
-		box.y = view->y - XWL_TITLEBAR_HEIGHT;
-		box.width = XWL_WINDOW_BORDER;
-		box.height =
-			view->surface->current.height + XWL_TITLEBAR_HEIGHT;
+		box.x = view->x - BORDER_WIDTH;
+		box.y = view->y - TITLE_HEIGHT;
+		box.width = BORDER_WIDTH;
+		box.height = view->surface->current.height + TITLE_HEIGHT;
 		break;
 	default:
 		break;

src/output.c

@@ -39,6 +39,8 @@ static void render_cycle_box(struct output *output)
 static void render_icon(struct draw_data *d, struct wlr_box box,
 			struct wlr_texture *texture)
 {
+	if (!texture)
+		return;
 	float matrix[9];
 	wlr_matrix_project_box(matrix, &box, WL_OUTPUT_TRANSFORM_NORMAL, 0,
 			       d->transform_matrix);
@@ -66,8 +68,12 @@ static void render_decorations(struct wlr_output *output, struct view *view)
 		ddata.rgba = theme.window_inactive_title_bg_color;
 	draw_rect(&ddata, deco_box(view, LAB_DECO_PART_TITLE));
 
-	render_icon(&ddata, deco_box(view, LAB_DECO_ICON_CLOSE),
+	render_icon(&ddata, deco_box(view, LAB_DECO_BUTTON_CLOSE),
 		    theme.xbm_close);
+	render_icon(&ddata, deco_box(view, LAB_DECO_BUTTON_MAXIMIZE),
+		    theme.xbm_maximize);
+	render_icon(&ddata, deco_box(view, LAB_DECO_BUTTON_ICONIFY),
+		    theme.xbm_iconify);
 }
 
 struct render_data {

src/theme/xbm/parse.c

@@ -36,10 +36,12 @@ static void process_bytes(struct pixmap *pixmap, struct token *tokens)
 			}
 			if (!t->type)
 				return;
-			int value = (int)strtol(t->name, NULL, 0);
+			if (t->type != TOKEN_INT)
+				return;
 			int bit = 1 << (col % 8);
-			if (value & bit)
-				pixmap->data[row * pixmap->width + col] = u32(defaultcolor);
+			if (t->value & bit)
+				pixmap->data[row * pixmap->width + col] =
+					u32(defaultcolor);
 		}
 		++t;
 	}
@@ -65,6 +67,25 @@ out:
 	return pixmap;
 }
 
+/* Assuming a 6x6 button for the time being */
+/* TODO: pass width, height, vargs bytes */
+struct pixmap xbm_create_pixmap_builtin(const char *button)
+{
+	struct pixmap pixmap = { 0 };
+
+	pixmap.width = 6;
+	pixmap.height = 6;
+
+	struct token t[7];
+	for (int i = 0; i < 6; i++) {
+		t[i].value = button[i];
+		t[i].type = TOKEN_INT;
+	}
+	t[6].type = 0;
+	process_bytes(&pixmap, t);
+	return pixmap;
+}
+
 char *xbm_read_file(const char *filename)
 {
 	char *line = NULL;

src/theme/xbm/tokenize.c

@@ -96,6 +96,8 @@ struct token *xbm_tokenize(char *buffer)
 		case '0' ... '9':
 			add_token(TOKEN_INT);
 			get_number_token();
+			struct token *token = tokens + nr_tokens - 1;
+			token->value = (int)strtol(token->name, NULL, 0);
 			continue;
 		case '{':
 			add_token(TOKEN_SPECIAL);

src/theme/xbm/xbm.c

@@ -10,8 +10,38 @@
 #include "theme/xbm/xbm.h"
 #include "theme/xbm/parse.h"
 
+/* built-in 6x6 buttons */
+char close_button_normal[] = { 0x33, 0x3f, 0x1e, 0x1e, 0x3f, 0x33 };
+char iconify_button_normal[] = { 0x00, 0x00, 0x00, 0x00, 0x3f, 0x3f };
+char max_button_normal[] = { 0x3f, 0x3f, 0x21, 0x21, 0x21, 0x3f };
+char max_button_toggled[] = { 0x3e, 0x22, 0x2f, 0x29, 0x39, 0x0f };
+
+/*
+ * TODO: parse rc.xml theme name and look for icons properly.
+ *       Just using random icon to prove the point.
+ */
 static char filename[] = "/usr/share/themes/Bear2/openbox-3/close.xbm";
 
+static struct wlr_texture *texture_from_pixmap(struct wlr_renderer *renderer,
+					       struct pixmap *pixmap)
+{
+	if (!pixmap)
+		return NULL;
+	return wlr_texture_from_pixels(renderer, WL_SHM_FORMAT_ARGB8888,
+				       pixmap->width * 4, pixmap->width,
+				       pixmap->height, pixmap->data);
+}
+
+static struct wlr_texture *builtin(struct wlr_renderer *renderer,
+				   const char *button)
+{
+	struct pixmap pixmap = xbm_create_pixmap_builtin(button);
+	struct wlr_texture *texture = texture_from_pixmap(renderer, &pixmap);
+	if (pixmap.data)
+		free(pixmap.data);
+	return texture;
+}
+
 void xbm_load(struct wlr_renderer *renderer)
 {
 	struct token *tokens;
@@ -19,16 +49,20 @@ void xbm_load(struct wlr_renderer *renderer)
 	char *buffer = xbm_read_file(filename);
 	if (!buffer) {
 		fprintf(stderr, "no buffer\n");
-		return;
+		goto out;
 	}
 	tokens = xbm_tokenize(buffer);
 	free(buffer);
 	struct pixmap pixmap = xbm_create_pixmap(tokens);
-	free(tokens);
-
-	theme.xbm_close = wlr_texture_from_pixels(
-		renderer, WL_SHM_FORMAT_ARGB8888, pixmap.width * 4,
-		pixmap.width, pixmap.height, pixmap.data);
+	theme.xbm_close = texture_from_pixmap(renderer, &pixmap);
+	if (tokens)
+		free(tokens);
 	if (pixmap.data)
 		free(pixmap.data);
+
+out:
+	if (!theme.xbm_close)
+		theme.xbm_close = builtin(renderer, close_button_normal);
+	theme.xbm_maximize = builtin(renderer, max_button_normal);
+	theme.xbm_iconify = builtin(renderer, iconify_button_normal);
 }