git.sur5r.net Git - i3/i3/blob - src/layout.c

   1 /*
   2  * vim:ts=8:expandtab
   3  *
   4  * i3 - an improved dynamic tiling window manager
   5  *
   6  * © 2009 Michael Stapelberg and contributors
   7  *
   8  * See file LICENSE for license information.
   9  *
  10  * layout.c: Functions handling layout/drawing of window decorations
  11  *
  12  */
  13 #include <stdio.h>
  14 #include <string.h>
  15 #include <stdlib.h>
  16 #include <xcb/xcb.h>
  17
  18 #include "font.h"
  19 #include "i3.h"
  20 #include "xcb.h"
  21 #include "table.h"
  22 #include "util.h"
  23 #include "xinerama.h"
  24
  25 /*
  26  * For resizing containers (= cells), we need to know the space which is unoccupied by "default"
  27  * windows. The resized containers will be rendered relatively to this space, meaning that newly
  28  * created columns/rows after a container was resized will start with their normal size.
  29  *
  30  */
  31 Rect get_unoccupied_space(Workspace *workspace) {
  32         printf("getting unoccupied space\n");
  33         float default_factor_w = ((float)workspace->rect.width / (float)workspace->cols) / (float)workspace->rect.width;
  34         float default_factor_h = (workspace->rect.height / workspace->rows) / workspace->rect.height;
  35         Rect result = {0, 0, workspace->rect.width, workspace->rect.height};
  36
  37         printf("default factor is %f and %f\n", default_factor_w, default_factor_h);
  38         printf("start w = %d, h = %d\n", result.width, result.height);
  39         /* TODO: colspan/rowspan*/
  40
  41         for (int cols = 0; cols < workspace->cols; cols++)
  42                 for (int rows = 0; rows < workspace->rows; rows++) {
  43                         printf("oh hai. wf[%d][%d] = %f\n", cols, rows, workspace->table[cols][rows]->width_factor);
  44                         if (workspace->table[cols][rows]->width_factor == 0)
  45                                 result.width -= workspace->rect.width * default_factor_w;
  46                         if (workspace->table[cols][rows]->height_factor == 0)
  47                                 result.height -= workspace->rect.height * default_factor_h;
  48                 }
  49
  50         /* If every container is using the default factor, we have the whole space available */
  51         if (result.width == 0)
  52                 result.width = workspace->rect.width;
  53
  54         if (result.height == 0)
  55                 result.height = workspace->rect.height;
  56
  57         printf("unoccupied x = %d, unoccupied y = %d\n", result.width, result.height);
  58
  59         return result;
  60 }
  61
  62 /*
  63  * (Re-)draws window decorations for a given Client
  64  *
  65  */
  66 void decorate_window(xcb_connection_t *conn, Client *client) {
  67         uint32_t mask = 0;
  68         uint32_t values[3];
  69         i3Font *font = load_font(conn, pattern);
  70         uint32_t background_color,
  71                  text_color,
  72                  border_color;
  73
  74         if (client->container->currently_focused == client) {
  75                 background_color = get_colorpixel(conn, client->frame, "#285577");
  76                 text_color = get_colorpixel(conn, client->frame, "#ffffff");
  77                 border_color = get_colorpixel(conn, client->frame, "#4c7899");
  78         } else {
  79                 background_color = get_colorpixel(conn, client->frame, "#222222");
  80                 text_color = get_colorpixel(conn, client->frame, "#888888");
  81                 border_color = get_colorpixel(conn, client->frame, "#333333");
  82         }
  83
  84         /* Our plan is the following:
  85            - Draw a rect around the whole client in background_color
  86            - Draw two lines in a lighter color
  87            - Draw the window’s title
  88
  89            Note that xcb_image_text apparently adds 1xp border around the font? Can anyone confirm this?
  90          */
  91
  92         /* Draw a green rectangle around the window */
  93         mask = XCB_GC_FOREGROUND;
  94         values[0] = background_color;
  95         xcb_change_gc(conn, client->titlegc, mask, values);
  96
  97         xcb_rectangle_t rect = {0, 0, client->rect.width, client->rect.height};
  98         xcb_poly_fill_rectangle(conn, client->frame, client->titlegc, 1, &rect);
  99
 100         /* Draw the lines */
 101         /* TODO: this needs to be more beautiful somewhen. maybe stdarg + change_gc(gc, ...) ? */
 102 #define DRAW_LINE(colorpixel, x, y, to_x, to_y) { \
 103                 uint32_t draw_values[1]; \
 104                 draw_values[0] = colorpixel; \
 105                 xcb_change_gc(conn, client->titlegc, XCB_GC_FOREGROUND, draw_values); \
 106                 xcb_point_t points[] = {{x, y}, {to_x, to_y}}; \
 107                 xcb_poly_line(conn, XCB_COORD_MODE_ORIGIN, client->frame, client->titlegc, 2, points); \
 108         }
 109
 110         DRAW_LINE(border_color, 2, 0, client->rect.width, 0);
 111         DRAW_LINE(border_color, 2, font->height + 3, 2 + client->rect.width, font->height + 3);
 112
 113         /* Draw the font */
 114         mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
 115
 116         values[0] = text_color;
 117         values[1] = background_color;
 118         values[2] = font->id;
 119
 120         xcb_change_gc(conn, client->titlegc, mask, values);
 121
 122         /* TODO: utf8? */
 123         char *label;
 124         asprintf(&label, "(%08x) %.*s", client->frame, client->name_len, client->name);
 125         xcb_void_cookie_t text_cookie = xcb_image_text_8_checked(conn, strlen(label), client->frame,
 126                                         client->titlegc, 3 /* X */, font->height /* Y = baseline of font */, label);
 127         check_error(conn, text_cookie, "Could not draw client's title");
 128         free(label);
 129 }
 130
 131 /*
 132  * Pushes the client’s x and y coordinates to X11
 133  *
 134  */
 135 static void reposition_client(xcb_connection_t *connection, Client *client) {
 136         printf("frame needs to be pushed to %dx%d\n", client->rect.x, client->rect.y);
 137         /* Note: We can use a pointer to client->x like an array of uint32_ts
 138            because it is followed by client->y by definition */
 139         xcb_configure_window(connection, client->frame,
 140                         XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, &(client->rect.x));
 141 }
 142
 143 /*
 144  * Pushes the client’s width/height to X11 and resizes the child window
 145  *
 146  */
 147 static void resize_client(xcb_connection_t *connection, Client *client) {
 148         i3Font *font = load_font(connection, pattern);
 149
 150         printf("resizing client to %d x %d\n", client->rect.width, client->rect.height);
 151         xcb_configure_window(connection, client->frame,
 152                         XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT,
 153                         &(client->rect.width));
 154
 155         /* Adjust the position of the child inside its frame.
 156          * The coordinates of the child are relative to its frame, we
 157          * add a border of 2 pixel to each value */
 158         uint32_t mask = XCB_CONFIG_WINDOW_X |
 159                         XCB_CONFIG_WINDOW_Y |
 160                         XCB_CONFIG_WINDOW_WIDTH |
 161                         XCB_CONFIG_WINDOW_HEIGHT;
 162         Rect rect;
 163         if (client->titlebar_position == TITLEBAR_OFF) {
 164                 rect.x = 0;
 165                 rect.y = 0;
 166                 rect.width = client->rect.width;
 167                 rect.height = client->rect.height;
 168         } else {
 169                 rect.x = 2;
 170                 rect.y = font->height + 2 + 2;
 171                 rect.width = client->rect.width - (2 + 2);
 172                 rect.height = client->rect.height - ((font->height + 2 + 2) + 2);
 173         }
 174
 175         printf("child will be at %dx%d with size %dx%d\n", rect.x, rect.y, rect.width, rect.height);
 176
 177         xcb_configure_window(connection, client->child, mask, &(rect.x));
 178 }
 179
 180 static void render_container(xcb_connection_t *connection, Container *container) {
 181         Client *client;
 182
 183         if (container->mode == MODE_DEFAULT) {
 184                 int num_clients = 0;
 185                 CIRCLEQ_FOREACH(client, &(container->clients), clients)
 186                         if (!client->dock)
 187                                 num_clients++;
 188                 printf("got %d clients in this default container.\n", num_clients);
 189
 190                 int current_client = 0;
 191                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 192                         /* TODO: currently, clients are assigned to the current container.
 193                            Therefore, we need to skip them here. Does anything harmful happen
 194                            if clients *do not* have a container. Is this the more desired
 195                            situation? Let’s find out… */
 196                         if (client->dock)
 197                                 continue;
 198                         /* TODO: at the moment, every column/row is screen / num_cols. This
 199                          * needs to be changed to "percentage of the screen" by
 200                          * default and adjustable by the user if necessary.
 201                          */
 202
 203                         /* Check if we changed client->x or client->y by updating it…
 204                          * Note the bitwise OR instead of logical OR to force evaluation of both statements */
 205                         if (client->force_reconfigure |
 206                             (client->rect.x != (client->rect.x = container->x)) |
 207                             (client->rect.y != (client->rect.y = container->y +
 208                                           (container->height / num_clients) * current_client))) {
 209                                 reposition_client(connection, client);
 210                         }
 211
 212                         /* TODO: vertical default layout */
 213                         if (client->force_reconfigure |
 214                             (client->rect.width != (client->rect.width = container->width)) |
 215                             (client->rect.height != (client->rect.height = container->height / num_clients))) {
 216                                 resize_client(connection, client);
 217                         }
 218
 219                         if (client->force_reconfigure)
 220                                 client->force_reconfigure = false;
 221
 222                         current_client++;
 223                 }
 224         } else {
 225                 /* TODO: Implement stacking */
 226         }
 227 }
 228
 229 static void render_bars(xcb_connection_t *connection, Workspace *r_ws, int width, int height) {
 230         Client *client;
 231         SLIST_FOREACH(client, &(r_ws->dock_clients), dock_clients) {
 232                 if (client->force_reconfigure |
 233                     (client->rect.x != (client->rect.x = 0)) |
 234                     (client->rect.y != (client->rect.y = height)))
 235                         reposition_client(connection, client);
 236
 237                 if (client->force_reconfigure |
 238                     (client->rect.width != (client->rect.width = width)) |
 239                     (client->rect.height != (client->rect.height = client->desired_height)))
 240                         resize_client(connection, client);
 241
 242                 client->force_reconfigure = false;
 243                 height += client->desired_height;
 244         }
 245 }
 246
 247 void render_layout(xcb_connection_t *connection) {
 248         i3Screen *screen;
 249
 250         TAILQ_FOREACH(screen, &virtual_screens, screens) {
 251                 /* r_ws (rendering workspace) is just a shortcut to the Workspace being currently rendered */
 252                 Workspace *r_ws = &(workspaces[screen->current_workspace]);
 253
 254                 printf("Rendering screen %d\n", screen->num);
 255                 if (r_ws->fullscreen_client != NULL)
 256                         /* This is easy: A client has entered fullscreen mode, so we don’t render at all */
 257                         continue;
 258
 259                 int width = r_ws->rect.width;
 260                 int height = r_ws->rect.height;
 261                 int x = r_ws->rect.x;
 262                 int y = r_ws->rect.y;
 263
 264                 Client *client;
 265                 SLIST_FOREACH(client, &(r_ws->dock_clients), dock_clients) {
 266                         printf("got dock client: %p\n", client);
 267                         printf("it wants to be this height: %d\n", client->desired_height);
 268                         height -= client->desired_height;
 269                 }
 270
 271                 printf("got %d rows and %d cols\n", r_ws->rows, r_ws->cols);
 272                 printf("each of them therefore is %d px width and %d px height\n",
 273                                 width / r_ws->cols, height / r_ws->rows);
 274
 275                 Rect space = get_unoccupied_space(r_ws);
 276                 printf("got %d / %d unoc space\n", space.width, space.height);
 277
 278                 /* Go through the whole table and render what’s necessary */
 279                 for (int cols = 0; cols < r_ws->cols; cols++)
 280                         for (int rows = 0; rows < r_ws->rows; rows++) {
 281                                 Container *container = r_ws->table[cols][rows];
 282                                 printf("container has %d colspan, %d rowspan\n",
 283                                                 container->colspan, container->rowspan);
 284                                 printf("container at %d, %d\n", x, y);
 285                                 /* Update position of the container */
 286                                 container->row = rows;
 287                                 container->col = cols;
 288                                 container->x = x;
 289                                 container->y = y;
 290                                 if (container->width_factor == 0)
 291                                         container->width = (width / r_ws->cols) * container->colspan;
 292                                 else container->width = space.width * container->width_factor;
 293                                 container->height = (height / r_ws->rows) * container->rowspan;
 294
 295                                 /* Render it */
 296                                 render_container(connection, container);
 297
 298                                 x += container->width;
 299                         }
 300
 301                 render_bars(connection, r_ws, width, height);
 302         }
 303
 304         xcb_flush(connection);
 305 }