Implement borders

The borders are implemented as a surface/buffer attached to each view
which is sent to and rendered by wlc in the view_pre_render callback.

All the drawing logic is handled in sway/border.c and all the logic for
calculating the geometry of the border/view is handled in
`update_geometry` in sway/layout.c (same place as gaps are calculated).

include/border.h

@@ -1,9 +1,10 @@
-#ifndef _SWAY_RENDER_H
-#define _SWAY_RENDER_H
+#ifndef _SWAY_BORDER_H
+#define _SWAY_BORDER_H
 #include <wlc/wlc.h>
 #include "container.h"
 
 void render_view_borders(wlc_handle view);
 void update_view_border(swayc_t *view);
+int get_font_text_height(const char *font);
 
 #endif

include/config.h

@@ -184,6 +184,7 @@ struct sway_config {
 	enum swayc_layouts default_orientation;
 	enum swayc_layouts default_layout;
 	char *font;
+	int font_height;
 
 	// Flags
 	bool focus_follows_mouse;

include/container.h

@@ -122,7 +122,8 @@ struct sway_container {
 	unsigned char *border;
 	enum swayc_border_types border_type;
 	struct wlc_geometry border_geometry;
-	struct wlc_geometry presumed_geometry;
+	struct wlc_geometry title_bar_geometry;
+	struct wlc_geometry actual_geometry;
 	int border_thickness;
 };
 

sway/CMakeLists.txt

@@ -26,7 +26,7 @@ add_executable(sway
 	output.c
 	resize.c
 	workspace.c
-    render.c
+	border.c
 )
 
 add_definitions(
@@ -36,6 +36,7 @@ add_definitions(
 target_link_libraries(sway
 	sway-common
 	sway-protocols
+	sway-wayland
 	${WLC_LIBRARIES}
 	${XKBCOMMON_LIBRARIES}
 	${PCRE_LIBRARIES}

sway/border.c

@@ -0,0 +1,247 @@
+#include "border.h"
+#include <wlc/wlc-render.h>
+#include <cairo/cairo.h>
+#include <pango/pangocairo.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include "container.h"
+#include "config.h"
+#include "client/pango.h"
+
+void cairo_set_source_u32(cairo_t *cairo, uint32_t color) {
+	int endian = 1;
+	if (*(char *)&endian == 1) {
+		cairo_set_source_rgba(cairo,
+				(color >> (1*8) & 0xFF) / 255.0,
+				(color >> (2*8) & 0xFF) / 255.0,
+				(color >> (3*8) & 0xFF) / 255.0,
+				(color >> (0*8) & 0xFF) / 255.0);
+	} else {
+		cairo_set_source_rgba(cairo,
+				(color >> (0*8) & 0xFF) / 255.0,
+				(color >> (3*8) & 0xFF) / 255.0,
+				(color >> (2*8) & 0xFF) / 255.0,
+				(color >> (1*8) & 0xFF) / 255.0);
+	}
+}
+
+static cairo_t *create_border_buffer(swayc_t *view, struct wlc_geometry geo, cairo_surface_t **surface) {
+	cairo_t *cr;
+	view->border_geometry = geo;
+	int stride = cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32, geo.size.w);
+	view->border = calloc(stride * geo.size.h, sizeof(unsigned char));
+	if (!view->border) {
+		sway_log(L_DEBUG, "Unable to allocate buffer");
+		return NULL;
+	}
+	*surface = cairo_image_surface_create_for_data(view->border,
+			CAIRO_FORMAT_ARGB32, geo.size.w, geo.size.h, stride);
+	if (cairo_surface_status(*surface) != CAIRO_STATUS_SUCCESS) {
+		free(view->border);
+		view->border = NULL;
+		sway_log(L_DEBUG, "Unable to allocate surface");
+		return NULL;
+	}
+	cr = cairo_create(*surface);
+	if (cairo_status(cr) != CAIRO_STATUS_SUCCESS) {
+		cairo_surface_destroy(*surface);
+		free(view->border);
+		view->border = NULL;
+		sway_log(L_DEBUG, "Unable to create cairo context");
+		return NULL;
+	}
+	return cr;
+}
+
+// TODO: move to client/cairo.h when local set_source_u32 is fixed.
+/**
+ * Renders a sharp line of any width and height.
+ *
+ * The line is drawn from (x,y) to (x+width,y+height) where width/height is 0
+ * if the line has a width/height of one pixel, respectively.
+ */
+static void render_sharp_line(cairo_t *cairo, uint32_t color, double x, double y, double width, double height) {
+	cairo_set_source_u32(cairo, color);
+
+	if (width > 1 && height > 1) {
+		cairo_rectangle(cairo, x, y, width, height);
+		cairo_fill(cairo);
+	} else {
+		if (width == 1) {
+			x += 0.5;
+			height += y;
+			width = x;
+		}
+
+		if (height == 1) {
+			y += 0.5;
+			width += x;
+			height = y;
+		}
+
+		cairo_move_to(cairo, x, y);
+		cairo_set_line_width(cairo, 1.0);
+		cairo_line_to(cairo, width, height);
+		cairo_stroke(cairo);
+	}
+}
+
+int get_font_text_height(const char *font) {
+	cairo_surface_t *surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 200, 200);
+	cairo_t *cr = cairo_create(surface);
+	int width, height;
+	get_text_size(cr, font, &width, &height, "Gg");
+	return height;
+}
+
+static void render_borders(swayc_t *view, cairo_t *cr, struct border_colors *colors) {
+	struct wlc_geometry *b = &view->border_geometry;
+	struct wlc_geometry *v = &view->actual_geometry;
+
+	// left border
+	int left_border = v->origin.x - b->origin.x;
+	if (left_border > 0) {
+		render_sharp_line(cr,
+				colors->child_border,
+				0, 0,
+				left_border,
+				b->size.h);
+	}
+
+	// right border
+	int right_border = b->size.w - v->size.w - left_border;
+	if (right_border > 0) {
+		render_sharp_line(cr,
+				colors->child_border,
+				b->size.w - right_border,
+				0,
+				right_border,
+				b->size.h);
+	}
+
+	// top border
+	int top_border = v->origin.y - b->origin.y;
+	if (top_border > 0) {
+		render_sharp_line(cr,
+				colors->child_border,
+				0, 0,
+				b->size.w,
+				top_border);
+	}
+
+	// bottom border
+	int bottom_border = b->size.h - (top_border + v->size.h);
+	if (bottom_border > 0) {
+		render_sharp_line(cr,
+				colors->child_border,
+				0,
+				b->size.h - bottom_border,
+				b->size.w,
+				bottom_border);
+	}
+}
+
+static void render_with_title_bar(swayc_t *view, cairo_t *cr, struct border_colors *colors) {
+	struct wlc_geometry *tb = &view->title_bar_geometry;
+	struct wlc_geometry *b = &view->border_geometry;
+
+	// borders
+	render_borders(view, cr, colors);
+
+	// title bar background
+	cairo_set_source_u32(cr, colors->child_border);
+	cairo_rectangle(cr, 0, 0, tb->size.w, tb->size.h);
+	cairo_fill(cr);
+
+	// header top line
+	render_sharp_line(cr, colors->border, 0, 0, tb->size.w, 1);
+
+	// text
+	int width, height;
+	get_text_size(cr, config->font, &width, &height, "%s", view->name);
+	cairo_move_to(cr, view->border_thickness, 2);
+	cairo_set_source_u32(cr, colors->text);
+	pango_printf(cr, config->font, "%s", view->name);
+
+	// header bottom line
+	render_sharp_line(cr, colors->border,
+			view->actual_geometry.origin.x - b->origin.x,
+			tb->size.h - 1,
+			view->actual_geometry.size.w, 1);
+}
+
+void update_view_border(swayc_t *view) {
+	cairo_t *cr = NULL;
+	cairo_surface_t *surface = NULL;
+
+	if (view->border) {
+		free(view->border);
+		view->border = NULL;
+	}
+
+	swayc_t *focused = get_focused_view(&root_container);
+	swayc_t *container = swayc_parent_by_type(view, C_CONTAINER);
+	swayc_t *focused_inactive = NULL;
+	if (container) {
+		focused_inactive = swayc_focus_by_type(container, C_VIEW);
+	} else {
+		container = swayc_parent_by_type(view, C_WORKSPACE);
+		if (container) {
+			focused_inactive = swayc_focus_by_type(container, C_VIEW);
+		}
+	}
+
+	switch (view->border_type) {
+	case B_NONE:
+		break;
+	case B_PIXEL:
+		cr = create_border_buffer(view, view->border_geometry, &surface);
+		if (!cr) {
+			break;
+		}
+
+		if (focused == view) {
+			render_borders(view, cr, &config->border_colors.focused);
+		} else if (focused_inactive == view) {
+			render_borders(view, cr, &config->border_colors.focused_inactive);
+		} else {
+			render_borders(view, cr, &config->border_colors.unfocused);
+		}
+
+		break;
+	case B_NORMAL:
+		cr = create_border_buffer(view, view->border_geometry, &surface);
+		if (!cr) {
+			break;
+		}
+
+		if (focused == view) {
+			render_with_title_bar(view, cr, &config->border_colors.focused);
+		} else if (focused_inactive == view) {
+			render_with_title_bar(view, cr, &config->border_colors.focused_inactive);
+		} else {
+			render_with_title_bar(view, cr, &config->border_colors.unfocused);
+		}
+
+		break;
+	}
+	if (surface) {
+		cairo_surface_flush(surface);
+		cairo_surface_destroy(surface);
+	}
+	if (cr) {
+		cairo_destroy(cr);
+	}
+}
+
+void render_view_borders(wlc_handle view) {
+	swayc_t *c = swayc_by_handle(view);
+
+	if (!c || c->border_type == B_NONE) {
+		return;
+	}
+
+	if (c->border) {
+		wlc_pixels_write(WLC_RGBA8888, &c->border_geometry, c->border);
+	}
+}

sway/commands.c

@@ -31,6 +31,7 @@
 #include "ipc-server.h"
 #include "list.h"
 #include "input.h"
+#include "border.h"
 
 typedef struct cmd_results *sway_cmd(int argc, char **argv);
 
@@ -359,6 +360,14 @@ static struct cmd_results *cmd_border(int argc, char **argv) {
 	}
 
 	enum swayc_border_types border = config->border;
+	int thickness = config->border_thickness;
+
+	swayc_t *view = NULL;
+	if (config->active) {
+		view = get_focused_view(&root_container);
+		border = view->border_type;
+		thickness = view->border_thickness;
+	}
 
 	if (strcasecmp(argv[0], "none") == 0) {
 		border = B_NONE;
@@ -367,7 +376,7 @@ static struct cmd_results *cmd_border(int argc, char **argv) {
 	} else if (strcasecmp(argv[0], "pixel") == 0) {
 		border = B_PIXEL;
 	} else if (strcasecmp(argv[0], "toggle") == 0) {
-		switch (config->border) {
+		switch (border) {
 		case B_NONE:
 			border = B_PIXEL;
 			break;
@@ -383,16 +392,24 @@ static struct cmd_results *cmd_border(int argc, char **argv) {
 			"Expected 'border <normal|pixel|none|toggle>");
 	}
 
+
 	if (argc == 2 && (border == B_NORMAL || border == B_PIXEL)) {
-		int thickness = (int)strtol(argv[1], NULL, 10);
+		thickness = (int)strtol(argv[1], NULL, 10);
 		if (errno == ERANGE || thickness < 0) {
 			errno = 0;
 			return cmd_results_new(CMD_INVALID, "border", "Number is out out of range.");
 		}
+	}
+
+	if (config->active && view) {
+		view->border_type = border;
+		view->border_thickness = thickness;
+		update_geometry(view);
+	} else {
+		config->border = border;
 		config->border_thickness = thickness;
 	}
 
-	config->border = border;
 	return cmd_results_new(CMD_SUCCESS, NULL, NULL);
 }
 
@@ -904,9 +921,9 @@ static struct cmd_results *cmd_move(int argc, char **argv) {
 	} else if (strcasecmp(argv[0], "position") == 0 && strcasecmp(argv[1], "mouse") == 0) {
 		if (view->is_floating) {
 			swayc_t *output = swayc_parent_by_type(view, C_OUTPUT);
-			const struct wlc_geometry *geometry = wlc_view_get_geometry(view->handle);
+			struct wlc_geometry g;
+			wlc_view_get_visible_geometry(view->handle, &g);
 			const struct wlc_size *size = wlc_output_get_resolution(output->handle);
-			struct wlc_geometry g = *geometry;
 
 			struct wlc_point origin;
 			wlc_pointer_get_position(&origin);
@@ -1954,6 +1971,8 @@ static struct cmd_results *cmd_font(int argc, char **argv) {
 		config->font = font;
 	}
 
+	config->font_height = get_font_text_height(config->font);
+
 	sway_log(L_DEBUG, "Settings font %s", config->font);
 	return cmd_results_new(CMD_SUCCESS, NULL, NULL);
 }

sway/config.c

@@ -22,6 +22,7 @@
 #include "input_state.h"
 #include "criteria.h"
 #include "input.h"
+#include "border.h"
 
 struct sway_config *config = NULL;
 
@@ -161,6 +162,7 @@ static void config_defaults(struct sway_config *config) {
 	config->default_layout = L_NONE;
 	config->default_orientation = L_NONE;
 	config->font = strdup("monospace 10");
+	config->font_height = get_font_text_height(config->font);
 
 	// Flags
 	config->focus_follows_mouse = true;

sway/container.c

@@ -22,8 +22,8 @@ static swayc_t *new_swayc(enum swayc_types type) {
 	c->gaps = -1;
 	c->layout = L_NONE;
 	c->type = type;
-	c->border_type = B_PIXEL; // TODO: Load default from config
-	c->border_thickness = 2;
+	c->border_type = config->border;
+	c->border_thickness = config->border_thickness;
 	if (type != C_VIEW) {
 		c->children = create_list();
 		c->border_type = B_NONE;
@@ -269,11 +269,12 @@ swayc_t *new_view(swayc_t *sibling, wlc_handle handle) {
 	view->is_focused = true;
 	view->sticky = false;
 	// Setup geometry
-	const struct wlc_geometry* geometry = wlc_view_get_geometry(handle);
+	struct wlc_geometry geometry;
+	wlc_view_get_visible_geometry(handle, &geometry);
 	view->width = 0;
 	view->height = 0;
-	view->desired_width = geometry->size.w;
-	view->desired_height = geometry->size.h;
+	view->desired_width = geometry.size.w;
+	view->desired_height = geometry.size.h;
 
 	view->is_floating = false;
 
@@ -306,13 +307,14 @@ swayc_t *new_floating_view(wlc_handle handle) {
 	view->sticky = false;
 
 	// Set the geometry of the floating view
-	const struct wlc_geometry* geometry = wlc_view_get_geometry(handle);
+	struct wlc_geometry geometry;
+	wlc_view_get_visible_geometry(handle, &geometry);
 
 	// give it requested geometry, but place in center
-	view->x = (swayc_active_workspace()->width - geometry->size.w) / 2;
-	view->y = (swayc_active_workspace()->height- geometry->size.h) / 2;
-	view->width = geometry->size.w;
-	view->height = geometry->size.h;
+	view->x = (swayc_active_workspace()->width - geometry.size.w) / 2;
+	view->y = (swayc_active_workspace()->height- geometry.size.h) / 2;
+	view->width = geometry.size.w;
+	view->height = geometry.size.h;
 
 	view->desired_width = view->width;
 	view->desired_height = view->height;

sway/focus.c

@@ -7,6 +7,7 @@
 #include "config.h"
 #include "input_state.h"
 #include "ipc-server.h"
+#include "border.h"
 
 bool locked_container_focus = false;
 bool locked_view_focus = false;
@@ -130,6 +131,7 @@ bool set_focused_container(swayc_t *c) {
 		// unactivate previous focus
 		if (focused->type == C_VIEW) {
 			wlc_view_set_state(focused->handle, WLC_BIT_ACTIVATED, false);
+			update_view_border(focused);
 		}
 		// activate current focus
 		if (p->type == C_VIEW) {
@@ -137,6 +139,7 @@ bool set_focused_container(swayc_t *c) {
 			// set focus if view_focus is unlocked
 			if (!locked_view_focus) {
 				wlc_view_focus(p->handle);
+				update_view_border(p);
 			}
 		}
 	} else if (p->type == C_WORKSPACE) {

sway/handlers.c

@@ -9,7 +9,7 @@
 #include <ctype.h>
 
 #include "handlers.h"
-#include "render.h"
+#include "border.h"
 #include "log.h"
 #include "layout.h"
 #include "config.h"
@@ -349,15 +349,14 @@ static void handle_view_geometry_request(wlc_handle handle, const struct wlc_geo
 		view->desired_width = geometry->size.w;
 		view->desired_height = geometry->size.h;
 
-		if (view->is_floating) {
-			view->width = view->desired_width;
-			view->height = view->desired_height;
-			view->x = geometry->origin.x;
-			view->y = geometry->origin.y;
-			arrange_windows(view->parent, -1, -1);
+		/* if (view->is_floating) { */
+		/* 	view->width = view->desired_width; */
+		/* 	view->height = view->desired_height; */
+		/* 	view->x = geometry->origin.x; */
+		/* 	view->y = geometry->origin.y; */
+		/* /1* 	arrange_windows(view->parent, -1, -1); *1/ */
+		/* } */
 	}
-	}
-	update_view_border(view);
 }
 
 static void handle_view_state_request(wlc_handle view, enum wlc_view_state_bit state, bool toggle) {

sway/layout.c

@@ -12,7 +12,7 @@
 #include "focus.h"
 #include "output.h"
 #include "ipc-server.h"
-#include "render.h"
+#include "border.h"
 
 swayc_t root_container;
 list_t *scratchpad;
@@ -427,6 +427,80 @@ void update_geometry(swayc_t *container) {
 			geometry.size.h = ws->y + ws->height - geometry.origin.y;
 		}
 	}
+
+	if (swayc_is_fullscreen(container)) {
+		container->border_geometry = (const struct wlc_geometry){0};
+		container->title_bar_geometry = (const struct wlc_geometry){0};
+	} else {
+		// make room for border
+		container->border_geometry = geometry;
+
+		int border_top = container->border_thickness;
+		int border_bottom = container->border_thickness;
+		int border_left = container->border_thickness;
+		int border_right = container->border_thickness;
+
+		// handle hide_edge_borders
+		if (config->hide_edge_borders != E_NONE && gap <= 0) {
+			swayc_t *output = swayc_parent_by_type(container, C_OUTPUT);
+			const struct wlc_size *size = wlc_output_get_resolution(output->handle);
+
+			if (config->hide_edge_borders == E_HORIZONTAL || config->hide_edge_borders == E_BOTH) {
+				if (geometry.origin.x == 0) {
+					border_left = 0;
+				}
+
+				if (geometry.origin.x + geometry.size.w == size->w) {
+					border_right = 0;
+				}
+			}
+
+			if (config->hide_edge_borders == E_VERTICAL || config->hide_edge_borders == E_BOTH) {
+				if (geometry.origin.y == 0) {
+					border_top = 0;
+				}
+
+				if (geometry.origin.y + geometry.size.h == size->h) {
+					border_bottom = 0;
+				}
+			}
+		}
+
+		switch (container->border_type) {
+		case B_NONE:
+			break;
+		case B_PIXEL:
+			geometry.origin.x += border_left;
+			geometry.origin.y += border_top;
+			geometry.size.w -= (border_left + border_right);
+			geometry.size.h -= (border_top + border_bottom);
+			break;
+		case B_NORMAL:
+			{
+				struct wlc_geometry title_bar = {
+					.origin = {
+						.x = container->border_geometry.origin.x,
+						.y = container->border_geometry.origin.y
+					},
+					.size = {
+						.w = container->border_geometry.size.w,
+						.h = config->font_height + 4 // borders + padding
+					}
+				};
+				geometry.origin.x += border_left;
+				geometry.origin.y += title_bar.size.h;
+				geometry.size.w -= (border_left + border_right);
+				geometry.size.h -= (border_bottom + title_bar.size.h);
+				container->title_bar_geometry = title_bar;
+				break;
+			}
+		}
+
+		container->actual_geometry = geometry;
+
+		update_view_border(container);
+	}
+
 	wlc_view_set_geometry(container->handle, 0, &geometry);
 }
 

sway/render.c

@@ -1,113 +0,0 @@
-#include "render.h"
-#include <wlc/wlc-render.h>
-#include <cairo/cairo.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include "container.h"
-
-void cairo_set_source_u32(cairo_t *cairo, uint32_t color) {
-	cairo_set_source_rgba(cairo,
-			(color >> (3*8) & 0xFF) / 255.0,
-			(color >> (2*8) & 0xFF) / 255.0,
-			(color >> (1*8) & 0xFF) / 255.0,
-			(color >> (0*8) & 0xFF) / 255.0);
-}
-
-cairo_t *create_border_buffer(swayc_t *view, struct wlc_geometry geo,
-		cairo_surface_t **surface) {
-	const int channels = 4;
-	cairo_t *cr;
-	view->border_geometry = geo;
-	view->border = calloc(channels * geo.size.w * geo.size.h,
-			sizeof(unsigned char));
-	if (!view->border) {
-		sway_log(L_DEBUG, "Unable to allocate buffer");
-		return NULL;
-	}
-	*surface = cairo_image_surface_create_for_data(view->border,
-			CAIRO_FORMAT_ARGB32, geo.size.w, geo.size.h, channels * geo.size.w);
-	if (cairo_surface_status(*surface) != CAIRO_STATUS_SUCCESS) {
-		free(view->border);
-		view->border = NULL;
-		sway_log(L_DEBUG, "Unable to allocate surface");
-		return NULL;
-	}
-	cr = cairo_create(*surface);
-	if (cairo_status(cr) != CAIRO_STATUS_SUCCESS) {
-		cairo_surface_destroy(*surface);
-		free(view->border);
-		view->border = NULL;
-		sway_log(L_DEBUG, "Unable to create cairo context");
-		return NULL;
-	}
-	return cr;
-}
-
-void update_view_border(swayc_t *view) {
-	struct wlc_geometry geo;
-	wlc_view_get_visible_geometry(view->handle, &geo);
-	cairo_t *cr = NULL;
-	cairo_surface_t *surface = NULL;
-
-	if (view->border) {
-		free(view->border);
-		view->border = NULL;
-	}
-
-	switch (view->border_type) {
-	case B_NONE:
-		view->border_geometry = geo;
-		break;
-	case B_PIXEL:
-		geo.origin.x -= view->border_thickness;
-		geo.origin.y -= view->border_thickness;
-		geo.size.w += view->border_thickness * 2;
-		geo.size.h += view->border_thickness * 2;
-		if (geo.size.w <= 0 || geo.size.h <= 0) {
-			view->border = NULL;
-			break;
-		}
-		cr = create_border_buffer(view, geo, &surface);
-		if (!cr) {
-			break;
-		}
-		cairo_set_source_u32(cr, 0x0000FFFF);
-		cairo_paint(cr);
-		break;
-	case B_NORMAL:
-		// TODO
-		break;
-	}
-	if (surface) {
-		cairo_surface_flush(surface);
-		cairo_surface_destroy(surface);
-	}
-	if (cr) {
-		cairo_destroy(cr);
-		sway_log(L_DEBUG, "Created border for %p (%dx%d+%d,%d)", view,
-				geo.size.w, geo.size.h, geo.origin.x, geo.origin.y);
-	}
-	view->border_geometry = geo;
-}
-
-void render_view_borders(wlc_handle view) {
-	swayc_t *c = swayc_by_handle(view);
-	if (!c || c->border_type == B_NONE) {
-		return;
-	}
-	struct wlc_geometry geo;
-	wlc_view_get_visible_geometry(view, &geo);
-	if (geo.size.w != c->presumed_geometry.size.w
-			|| geo.size.h != c->presumed_geometry.size.h
-			|| geo.origin.x != c->presumed_geometry.origin.x
-			|| geo.origin.y != c->presumed_geometry.origin.y) {
-		update_view_border(c);
-		c->presumed_geometry = geo;
-	}
-	if (c->border) {
-		geo = c->border_geometry;
-		sway_log(L_DEBUG, "Rendering border for %p (%dx%d+%d,%d)", c,
-				geo.size.w, geo.size.h, geo.origin.x, geo.origin.y);
-		wlc_pixels_write(WLC_RGBA8888, &c->border_geometry, c->border);
-	}
-}