1 files changed, 266 insertions, 0 deletions

diff --git a/sway/border.c b/sway/border.c
new file mode 100644
index 00000000..ab4b70f6
--- /dev/null
+++ b/sway/border.c
@@ -0,0 +1,266 @@
+#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) { // little endian
+                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 { // big endian
+                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
+        if (view->name) {
+                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 map_update_view_border(swayc_t *view, void *data) {
+        if (view->type == C_VIEW) {
+                update_view_border(view);
+        }
+}
+
+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_type == B_NORMAL) {
+                // update window title
+                const char *new_name = wlc_view_get_title(view);
+
+                if (new_name && strcmp(c->name, new_name) != 0) {
+                        free(c->name);
+                        c->name = strdup(new_name);
+                        update_view_border(c);
+                }
+        }
+
+        if (c->border) {
+                wlc_pixels_write(WLC_RGBA8888, &c->border_geometry, c->border);
+        }
+}