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 #include <assert.h>
  18
  19 #include "config.h"
  20 #include "font.h"
  21 #include "i3.h"
  22 #include "xcb.h"
  23 #include "table.h"
  24 #include "util.h"
  25 #include "xinerama.h"
  26
  27 /*
  28  * Gets the unoccupied space (= space which is available for windows which were resized by the user)
  29  * for the given row. This is necessary to render both, customly resized windows and never touched
  30  * windows correctly, meaning that the aspect ratio will be maintained when opening new windows.
  31  *
  32  */
  33 int get_unoccupied_x(Workspace *workspace, int row) {
  34         int unoccupied = workspace->rect.width;
  35         float default_factor = ((float)workspace->rect.width / workspace->cols) / workspace->rect.width;
  36
  37         printf("get_unoccupied_x(), starting with %d, default_factor = %f\n", unoccupied, default_factor);
  38
  39         for (int cols = 0; cols < workspace->cols;) {
  40                 Container *con = workspace->table[cols][row];
  41                 printf("width_factor[%d][%d] = %f, colspan = %d\n", cols, row, con->width_factor, con->colspan);
  42                 if (con->width_factor == 0)
  43                         unoccupied -= workspace->rect.width * default_factor * con->colspan;
  44                 cols += con->colspan;
  45         }
  46
  47         assert(unoccupied != 0);
  48
  49         printf("unoccupied space: %d\n", unoccupied);
  50         return unoccupied;
  51 }
  52
  53 /* See get_unoccupied_x() */
  54 int get_unoccupied_y(Workspace *workspace, int col) {
  55         int unoccupied = workspace->rect.height;
  56         float default_factor = ((float)workspace->rect.height / workspace->rows) / workspace->rect.height;
  57
  58         printf("get_unoccupied_y(), starting with %d, default_factor = %f\n", unoccupied, default_factor);
  59
  60         for (int rows = 0; rows < workspace->rows;) {
  61                 Container *con = workspace->table[col][rows];
  62                 printf("height_factor[%d][%d] = %f, rowspan %d\n", col, rows, con->height_factor, con->rowspan);
  63                 if (con->height_factor == 0)
  64                         unoccupied -= workspace->rect.height * default_factor * con->rowspan;
  65                 rows += con->rowspan;
  66         }
  67
  68         assert(unoccupied != 0);
  69
  70         printf("unoccupied space: %d\n", unoccupied);
  71         return unoccupied;
  72 }
  73
  74 /*
  75  * (Re-)draws window decorations for a given Client onto the given drawable/graphic context.
  76  * When in stacking mode, the window decorations are drawn onto an own window.
  77  *
  78  */
  79 void decorate_window(xcb_connection_t *conn, Client *client, xcb_drawable_t drawable, xcb_gcontext_t gc, int offset) {
  80         i3Font *font = load_font(conn, config.font);
  81         uint32_t background_color,
  82                  text_color,
  83                  border_color;
  84
  85         /* Clients without a container (docks) won’t get decorated */
  86         if (client->container == NULL)
  87                 return;
  88
  89         if (client->container->currently_focused == client) {
  90                 background_color = get_colorpixel(conn, client, client->frame, "#285577");
  91                 text_color = get_colorpixel(conn, client, client->frame, "#ffffff");
  92                 border_color = get_colorpixel(conn, client, client->frame, "#4c7899");
  93         } else {
  94                 background_color = get_colorpixel(conn, client, client->frame, "#222222");
  95                 text_color = get_colorpixel(conn, client, client->frame, "#888888");
  96                 border_color = get_colorpixel(conn, client, client->frame, "#333333");
  97         }
  98
  99         /* Our plan is the following:
 100            - Draw a rect around the whole client in background_color
 101            - Draw two lines in a lighter color
 102            - Draw the window’s title
 103          */
 104
 105         /* Draw a green rectangle around the window */
 106         xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, background_color);
 107
 108         xcb_rectangle_t rect = {0, offset, client->rect.width, offset + client->rect.height};
 109         xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
 110
 111         /* Draw the lines */
 112         xcb_draw_line(conn, drawable, gc, border_color, 2, offset, client->rect.width, offset);
 113         xcb_draw_line(conn, drawable, gc, border_color, 2, offset + font->height + 3,
 114                       2 + client->rect.width, offset + font->height + 3);
 115
 116         /* Draw the font */
 117         uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
 118         uint32_t values[] = { text_color, background_color, font->id };
 119         xcb_change_gc(conn, gc, mask, values);
 120
 121         /* TODO: utf8? */
 122         char *label;
 123         asprintf(&label, "(%08x) %.*s", client->frame, client->name_len, client->name);
 124         xcb_void_cookie_t text_cookie = xcb_image_text_8_checked(conn, strlen(label), drawable,
 125                                         gc, 3 /* X */, offset + font->height /* Y = baseline of font */, label);
 126         check_error(conn, text_cookie, "Could not draw client's title");
 127         free(label);
 128 }
 129
 130 /*
 131  * Pushes the client’s x and y coordinates to X11
 132  *
 133  */
 134 static void reposition_client(xcb_connection_t *connection, Client *client) {
 135         printf("frame needs to be pushed to %dx%d\n", client->rect.x, client->rect.y);
 136         /* Note: We can use a pointer to client->x like an array of uint32_ts
 137            because it is followed by client->y by definition */
 138         xcb_configure_window(connection, client->frame,
 139                         XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, &(client->rect.x));
 140 }
 141
 142 /*
 143  * Pushes the client’s width/height to X11 and resizes the child window
 144  *
 145  */
 146 static void resize_client(xcb_connection_t *connection, Client *client) {
 147         i3Font *font = load_font(connection, config.font);
 148
 149         printf("resizing client to %d x %d\n", client->rect.width, client->rect.height);
 150         xcb_configure_window(connection, client->frame,
 151                         XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT,
 152                         &(client->rect.width));
 153
 154         /* Adjust the position of the child inside its frame.
 155          * The coordinates of the child are relative to its frame, we
 156          * add a border of 2 pixel to each value */
 157         uint32_t mask = XCB_CONFIG_WINDOW_X |
 158                         XCB_CONFIG_WINDOW_Y |
 159                         XCB_CONFIG_WINDOW_WIDTH |
 160                         XCB_CONFIG_WINDOW_HEIGHT;
 161         Rect rect;
 162         if (client->titlebar_position == TITLEBAR_OFF ||
 163             client->container->mode == MODE_STACK) {
 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 /*
 181  * Renders the given container. Is called by render_layout() or individually (for example
 182  * when focus changes in a stacking container)
 183  *
 184  */
 185 void render_container(xcb_connection_t *connection, Container *container) {
 186         Client *client;
 187         int num_clients = 0, current_client = 0;
 188
 189         if (container->currently_focused == NULL)
 190                 return;
 191
 192         CIRCLEQ_FOREACH(client, &(container->clients), clients)
 193                 num_clients++;
 194
 195         if (container->mode == MODE_DEFAULT) {
 196                 printf("got %d clients in this default container.\n", num_clients);
 197                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 198                         /* Check if we changed client->x or client->y by updating it.
 199                          * Note the bitwise OR instead of logical OR to force evaluation of both statements */
 200                         if (client->force_reconfigure |
 201                             (client->rect.x != (client->rect.x = container->x)) |
 202                             (client->rect.y != (client->rect.y = container->y +
 203                                           (container->height / num_clients) * current_client))) {
 204                                 reposition_client(connection, client);
 205                         }
 206
 207                         /* TODO: vertical default layout */
 208                         if (client->force_reconfigure |
 209                             (client->rect.width != (client->rect.width = container->width)) |
 210                             (client->rect.height != (client->rect.height = container->height / num_clients))) {
 211                                 resize_client(connection, client);
 212                         }
 213
 214                         if (client->force_reconfigure)
 215                                 client->force_reconfigure = false;
 216
 217                         current_client++;
 218                 }
 219         } else {
 220                 i3Font *font = load_font(connection, config.font);
 221                 int decoration_height = (font->height + 2 + 2);
 222                 struct Stack_Window *stack_win = &(container->stack_win);
 223
 224                 /* Check if we need to remap our stack title window, it gets unmapped when the container
 225                    is empty in src/handlers.c:unmap_notify() */
 226                 if (stack_win->height == 0)
 227                         xcb_map_window(connection, stack_win->window);
 228
 229                 /* Check if we need to reconfigure our stack title window */
 230                 if ((stack_win->width != (stack_win->width = container->width)) |
 231                     (stack_win->height != (stack_win->height = decoration_height * num_clients)))
 232                         xcb_configure_window(connection, stack_win->window,
 233                                 XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT, &(stack_win->width));
 234
 235                 /* Reconfigure the currently focused client, if necessary. It is the only visible one */
 236                 client = container->currently_focused;
 237
 238                 /* Check if we changed client->x or client->y by updating it.
 239                  * Note the bitwise OR instead of logical OR to force evaluation of both statements */
 240                 if (client->force_reconfigure |
 241                     (client->rect.x != (client->rect.x = container->x)) |
 242                     (client->rect.y != (client->rect.y = container->y + (decoration_height * num_clients))))
 243                         reposition_client(connection, client);
 244
 245                 if (client->force_reconfigure |
 246                     (client->rect.width != (client->rect.width = container->width)) |
 247                     (client->rect.height !=
 248                      (client->rect.height = container->height - (decoration_height * num_clients))))
 249                         resize_client(connection, client);
 250
 251                 client->force_reconfigure = false;
 252
 253                 uint32_t values[] = { XCB_STACK_MODE_ABOVE };
 254                 xcb_configure_window(connection, client->frame, XCB_CONFIG_WINDOW_STACK_MODE, values);
 255
 256                 /* Render the decorations of all clients */
 257                 CIRCLEQ_FOREACH(client, &(container->clients), clients)
 258                         decorate_window(connection, client, stack_win->window, stack_win->gc,
 259                                         current_client++ * decoration_height);
 260         }
 261 }
 262
 263 static void render_bars(xcb_connection_t *connection, Workspace *r_ws, int width, int height) {
 264         Client *client;
 265         SLIST_FOREACH(client, &(r_ws->dock_clients), dock_clients) {
 266                 if (client->force_reconfigure |
 267                     (client->rect.x != (client->rect.x = 0)) |
 268                     (client->rect.y != (client->rect.y = height)))
 269                         reposition_client(connection, client);
 270
 271                 if (client->force_reconfigure |
 272                     (client->rect.width != (client->rect.width = width)) |
 273                     (client->rect.height != (client->rect.height = client->desired_height)))
 274                         resize_client(connection, client);
 275
 276                 client->force_reconfigure = false;
 277                 height += client->desired_height;
 278         }
 279 }
 280
 281 void render_layout(xcb_connection_t *connection) {
 282         i3Screen *screen;
 283
 284         TAILQ_FOREACH(screen, &virtual_screens, screens) {
 285                 /* r_ws (rendering workspace) is just a shortcut to the Workspace being currently rendered */
 286                 Workspace *r_ws = &(workspaces[screen->current_workspace]);
 287
 288                 printf("Rendering screen %d\n", screen->num);
 289                 if (r_ws->fullscreen_client != NULL)
 290                         /* This is easy: A client has entered fullscreen mode, so we don’t render at all */
 291                         continue;
 292
 293                 int width = r_ws->rect.width;
 294                 int height = r_ws->rect.height;
 295
 296                 /* Reserve space for dock clients */
 297                 Client *client;
 298                 SLIST_FOREACH(client, &(r_ws->dock_clients), dock_clients)
 299                         height -= client->desired_height;
 300
 301                 printf("got %d rows and %d cols\n", r_ws->rows, r_ws->cols);
 302
 303                 int xoffset[r_ws->rows];
 304                 int yoffset[r_ws->cols];
 305                 /* Initialize offsets */
 306                 for (int cols = 0; cols < r_ws->cols; cols++)
 307                         yoffset[cols] = r_ws->rect.y;
 308                 for (int rows = 0; rows < r_ws->rows; rows++)
 309                         xoffset[rows] = r_ws->rect.x;
 310
 311                 /* Go through the whole table and render what’s necessary */
 312                 for (int cols = 0; cols < r_ws->cols; cols++)
 313                         for (int rows = 0; rows < r_ws->rows; rows++) {
 314                                 Container *container = r_ws->table[cols][rows];
 315                                 printf("\n========\ncontainer has %d colspan, %d rowspan\n",
 316                                                 container->colspan, container->rowspan);
 317                                 printf("container at %d, %d\n", xoffset[rows], yoffset[cols]);
 318                                 /* Update position of the container */
 319                                 container->row = rows;
 320                                 container->col = cols;
 321                                 container->x = xoffset[rows];
 322                                 container->y = yoffset[cols];
 323
 324                                 if (container->width_factor == 0)
 325                                         container->width = (width / r_ws->cols);
 326                                 else container->width = get_unoccupied_x(r_ws, rows) * container->width_factor;
 327                                 container->width *= container->colspan;
 328
 329                                 if (container->height_factor == 0)
 330                                         container->height = (height / r_ws->rows);
 331                                 else container->height = get_unoccupied_y(r_ws, cols) * container->height_factor;
 332                                 container->height *= container->rowspan;
 333
 334                                 /* Render the container if it is not empty */
 335                                 render_container(connection, container);
 336
 337                                 xoffset[rows] += container->width;
 338                                 yoffset[cols] += container->height;
 339                                 printf("==========\n");
 340                         }
 341
 342                 render_bars(connection, r_ws, width, height);
 343         }
 344
 345         xcb_flush(connection);
 346 }