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 /* This macro copies the old value of the given variable, changes the variable to contain
  28    th new one and returns true if it changed */
  29 #define HAS_CHANGED(value, new) (old_value = value, old_value != (value = new))
  30
  31 static int old_value;
  32
  33 /*
  34  * Gets the unoccupied space (= space which is available for windows which were resized by the user)
  35  * for the given row. This is necessary to render both, customly resized windows and never touched
  36  * windows correctly, meaning that the aspect ratio will be maintained when opening new windows.
  37  *
  38  */
  39 int get_unoccupied_x(Workspace *workspace, int row) {
  40         int unoccupied = workspace->rect.width;
  41         float default_factor = ((float)workspace->rect.width / workspace->cols) / workspace->rect.width;
  42
  43         printf("get_unoccupied_x(), starting with %d, default_factor = %f\n", unoccupied, default_factor);
  44
  45         for (int cols = 0; cols < workspace->cols;) {
  46                 Container *con = workspace->table[cols][row];
  47                 printf("width_factor[%d][%d] = %f, colspan = %d\n", cols, row, con->width_factor, con->colspan);
  48                 if (con->width_factor == 0)
  49                         unoccupied -= workspace->rect.width * default_factor * con->colspan;
  50                 cols += con->colspan;
  51         }
  52
  53         assert(unoccupied != 0);
  54
  55         printf("unoccupied space: %d\n", unoccupied);
  56         return unoccupied;
  57 }
  58
  59 /* See get_unoccupied_x() */
  60 int get_unoccupied_y(Workspace *workspace, int col) {
  61         int unoccupied = workspace->rect.height;
  62         float default_factor = ((float)workspace->rect.height / workspace->rows) / workspace->rect.height;
  63
  64         printf("get_unoccupied_y(), starting with %d, default_factor = %f\n", unoccupied, default_factor);
  65
  66         for (int rows = 0; rows < workspace->rows;) {
  67                 Container *con = workspace->table[col][rows];
  68                 printf("height_factor[%d][%d] = %f, rowspan %d\n", col, rows, con->height_factor, con->rowspan);
  69                 if (con->height_factor == 0)
  70                         unoccupied -= workspace->rect.height * default_factor * con->rowspan;
  71                 rows += con->rowspan;
  72         }
  73
  74         assert(unoccupied != 0);
  75
  76         printf("unoccupied space: %d\n", unoccupied);
  77         return unoccupied;
  78 }
  79
  80 /*
  81  * (Re-)draws window decorations for a given Client onto the given drawable/graphic context.
  82  * When in stacking mode, the window decorations are drawn onto an own window.
  83  *
  84  */
  85 void decorate_window(xcb_connection_t *conn, Client *client, xcb_drawable_t drawable, xcb_gcontext_t gc, int offset) {
  86         i3Font *font = load_font(conn, config.font);
  87         uint32_t background_color,
  88                  text_color,
  89                  border_color;
  90
  91         /* Clients without a container (docks) won’t get decorated */
  92         if (client->container == NULL)
  93                 return;
  94
  95         if (client->container->currently_focused == client) {
  96                 background_color = get_colorpixel(conn, client, client->frame, "#285577");
  97                 text_color = get_colorpixel(conn, client, client->frame, "#ffffff");
  98                 border_color = get_colorpixel(conn, client, client->frame, "#4c7899");
  99         } else {
 100                 background_color = get_colorpixel(conn, client, client->frame, "#222222");
 101                 text_color = get_colorpixel(conn, client, client->frame, "#888888");
 102                 border_color = get_colorpixel(conn, client, client->frame, "#333333");
 103         }
 104
 105         /* Our plan is the following:
 106            - Draw a rect around the whole client in background_color
 107            - Draw two lines in a lighter color
 108            - Draw the window’s title
 109          */
 110
 111         /* Draw a rectangle in background color around the window */
 112         xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, background_color);
 113
 114         xcb_rectangle_t rect = {0, offset, client->rect.width, offset + client->rect.height};
 115         xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
 116
 117         /* Draw the lines */
 118         xcb_draw_line(conn, drawable, gc, border_color, 2, offset, client->rect.width, offset);
 119         xcb_draw_line(conn, drawable, gc, border_color, 2, offset + font->height + 3,
 120                       2 + client->rect.width, offset + font->height + 3);
 121
 122         /* Draw the font */
 123         uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
 124         uint32_t values[] = { text_color, background_color, font->id };
 125         xcb_change_gc(conn, gc, mask, values);
 126
 127         /* TODO: utf8? */
 128         char *label;
 129         asprintf(&label, "(%08x) %.*s", client->frame, client->name_len, client->name);
 130         xcb_void_cookie_t text_cookie = xcb_image_text_8_checked(conn, strlen(label), drawable,
 131                                         gc, 3 /* X */, offset + font->height /* Y = baseline of font */, label);
 132         check_error(conn, text_cookie, "Could not draw client's title");
 133         free(label);
 134 }
 135
 136 /*
 137  * Pushes the client’s x and y coordinates to X11
 138  *
 139  */
 140 static void reposition_client(xcb_connection_t *connection, Client *client) {
 141         printf("frame needs to be pushed to %dx%d\n", client->rect.x, client->rect.y);
 142         /* Note: We can use a pointer to client->x like an array of uint32_ts
 143            because it is followed by client->y by definition */
 144         xcb_configure_window(connection, client->frame,
 145                         XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, &(client->rect.x));
 146 }
 147
 148 /*
 149  * Pushes the client’s width/height to X11 and resizes the child window
 150  *
 151  */
 152 static void resize_client(xcb_connection_t *connection, Client *client) {
 153         i3Font *font = load_font(connection, config.font);
 154
 155         printf("resizing client to %d x %d\n", client->rect.width, client->rect.height);
 156         xcb_configure_window(connection, client->frame,
 157                         XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT,
 158                         &(client->rect.width));
 159
 160         /* Adjust the position of the child inside its frame.
 161          * The coordinates of the child are relative to its frame, we
 162          * add a border of 2 pixel to each value */
 163         uint32_t mask = XCB_CONFIG_WINDOW_X |
 164                         XCB_CONFIG_WINDOW_Y |
 165                         XCB_CONFIG_WINDOW_WIDTH |
 166                         XCB_CONFIG_WINDOW_HEIGHT;
 167         Rect rect;
 168         switch (client->container->mode) {
 169                 case MODE_STACK:
 170                         rect.x = 2;
 171                         rect.y = 0;
 172                         rect.width = client->rect.width - (2 + 2);
 173                         rect.height = client->rect.height - 2;
 174                         break;
 175                 default:
 176                         if (client->titlebar_position == TITLEBAR_OFF) {
 177                                 rect.x = 0;
 178                                 rect.y = 0;
 179                                 rect.width = client->rect.width;
 180                                 rect.height = client->rect.height;
 181                         } else {
 182                                 rect.x = 2;
 183                                 rect.y = font->height + 2 + 2;
 184                                 rect.width = client->rect.width - (2 + 2);
 185                                 rect.height = client->rect.height - ((font->height + 2 + 2) + 2);
 186                         }
 187                         break;
 188         }
 189
 190         printf("child will be at %dx%d with size %dx%d\n", rect.x, rect.y, rect.width, rect.height);
 191
 192         xcb_configure_window(connection, client->child, mask, &(rect.x));
 193 }
 194
 195 /*
 196  * Renders the given container. Is called by render_layout() or individually (for example
 197  * when focus changes in a stacking container)
 198  *
 199  */
 200 void render_container(xcb_connection_t *connection, Container *container) {
 201         Client *client;
 202         int num_clients = 0, current_client = 0;
 203
 204         if (container->currently_focused == NULL)
 205                 return;
 206
 207         CIRCLEQ_FOREACH(client, &(container->clients), clients)
 208                 num_clients++;
 209
 210         if (container->mode == MODE_DEFAULT) {
 211                 printf("got %d clients in this default container.\n", num_clients);
 212                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 213                         /* Check if we changed client->x or client->y by updating it.
 214                          * Note the bitwise OR instead of logical OR to force evaluation of both statements */
 215                         if (client->force_reconfigure |
 216                             HAS_CHANGED(client->rect.x, container->x) |
 217                             HAS_CHANGED(client->rect.y, container->y +
 218                                         (container->height / num_clients) * current_client))
 219                                 reposition_client(connection, client);
 220
 221                         /* TODO: vertical default layout */
 222                         if (client->force_reconfigure |
 223                             HAS_CHANGED(client->rect.width, container->width) |
 224                             HAS_CHANGED(client->rect.height, container->height / num_clients)) {
 225                                 resize_client(connection, client);
 226                         } else printf("no reconfigure necessary\n");
 227                         printf("after client->rect.width = %d, client->rect.height = %d\n", client->rect.width,
 228                                         client->rect.height);
 229
 230
 231                         if (client->force_reconfigure)
 232                                 client->force_reconfigure = false;
 233
 234                         current_client++;
 235                 }
 236         } else {
 237                 i3Font *font = load_font(connection, config.font);
 238                 int decoration_height = (font->height + 2 + 2);
 239                 struct Stack_Window *stack_win = &(container->stack_win);
 240
 241                 /* Check if we need to remap our stack title window, it gets unmapped when the container
 242                    is empty in src/handlers.c:unmap_notify() */
 243                 if (stack_win->height == 0)
 244                         xcb_map_window(connection, stack_win->window);
 245
 246                 /* Check if we need to reconfigure our stack title window */
 247                 if (HAS_CHANGED(stack_win->width, container->width) |
 248                     HAS_CHANGED(stack_win->height, decoration_height * num_clients)) {
 249                         xcb_configure_window(connection, stack_win->window,
 250                                 XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT, &(stack_win->width));
 251
 252                         uint32_t values[] = { XCB_STACK_MODE_ABOVE };
 253                         xcb_configure_window(connection, stack_win->window, XCB_CONFIG_WINDOW_STACK_MODE, values);
 254                 }
 255
 256                 /* Reconfigure the currently focused client, if necessary. It is the only visible one */
 257                 client = container->currently_focused;
 258
 259                 /* Check if we changed client->x or client->y by updating it.
 260                  * Note the bitwise OR instead of logical OR to force evaluation of both statements */
 261                 if (client->force_reconfigure |
 262                     HAS_CHANGED(client->rect.x, container->x) |
 263                     HAS_CHANGED(client->rect.y, container->y + (decoration_height * num_clients)))
 264                         reposition_client(connection, client);
 265
 266                 if (client->force_reconfigure |
 267                     HAS_CHANGED(client->rect.width, container->width) |
 268                     HAS_CHANGED(client->rect.height, container->height - (decoration_height * num_clients)))
 269                         resize_client(connection, client);
 270
 271                 client->force_reconfigure = false;
 272
 273                 uint32_t values[] = { XCB_STACK_MODE_ABOVE };
 274                 xcb_configure_window(connection, client->frame, XCB_CONFIG_WINDOW_STACK_MODE, values);
 275
 276                 /* Render the decorations of all clients */
 277                 CIRCLEQ_FOREACH(client, &(container->clients), clients)
 278                         decorate_window(connection, client, stack_win->window, stack_win->gc,
 279                                         current_client++ * decoration_height);
 280         }
 281 }
 282
 283 static void render_bars(xcb_connection_t *connection, Workspace *r_ws, int width, int height) {
 284         Client *client;
 285         SLIST_FOREACH(client, &(r_ws->dock_clients), dock_clients) {
 286                 if (client->force_reconfigure |
 287                     HAS_CHANGED(client->rect.x, 0) |
 288                     HAS_CHANGED(client->rect.y, height))
 289                         reposition_client(connection, client);
 290
 291                 if (client->force_reconfigure |
 292                     HAS_CHANGED(client->rect.width, width) |
 293                     HAS_CHANGED(client->rect.height, client->desired_height))
 294                         resize_client(connection, client);
 295
 296                 client->force_reconfigure = false;
 297                 height += client->desired_height;
 298         }
 299 }
 300
 301 void render_layout(xcb_connection_t *connection) {
 302         i3Screen *screen;
 303
 304         TAILQ_FOREACH(screen, &virtual_screens, screens) {
 305                 /* r_ws (rendering workspace) is just a shortcut to the Workspace being currently rendered */
 306                 Workspace *r_ws = &(workspaces[screen->current_workspace]);
 307
 308                 printf("Rendering screen %d\n", screen->num);
 309                 if (r_ws->fullscreen_client != NULL)
 310                         /* This is easy: A client has entered fullscreen mode, so we don’t render at all */
 311                         continue;
 312
 313                 int width = r_ws->rect.width;
 314                 int height = r_ws->rect.height;
 315
 316                 /* Reserve space for dock clients */
 317                 Client *client;
 318                 SLIST_FOREACH(client, &(r_ws->dock_clients), dock_clients)
 319                         height -= client->desired_height;
 320
 321                 printf("got %d rows and %d cols\n", r_ws->rows, r_ws->cols);
 322
 323                 int xoffset[r_ws->rows];
 324                 int yoffset[r_ws->cols];
 325                 /* Initialize offsets */
 326                 for (int cols = 0; cols < r_ws->cols; cols++)
 327                         yoffset[cols] = r_ws->rect.y;
 328                 for (int rows = 0; rows < r_ws->rows; rows++)
 329                         xoffset[rows] = r_ws->rect.x;
 330
 331                 /* Go through the whole table and render what’s necessary */
 332                 for (int cols = 0; cols < r_ws->cols; cols++)
 333                         for (int rows = 0; rows < r_ws->rows; rows++) {
 334                                 Container *container = r_ws->table[cols][rows];
 335                                 printf("\n========\ncontainer has %d colspan, %d rowspan\n",
 336                                                 container->colspan, container->rowspan);
 337                                 printf("container at %d, %d\n", xoffset[rows], yoffset[cols]);
 338                                 /* Update position of the container */
 339                                 container->row = rows;
 340                                 container->col = cols;
 341                                 container->x = xoffset[rows];
 342                                 container->y = yoffset[cols];
 343
 344                                 if (container->width_factor == 0)
 345                                         container->width = (width / r_ws->cols);
 346                                 else container->width = get_unoccupied_x(r_ws, rows) * container->width_factor;
 347                                 container->width *= container->colspan;
 348
 349                                 if (container->height_factor == 0)
 350                                         container->height = (height / r_ws->rows);
 351                                 else container->height = get_unoccupied_y(r_ws, cols) * container->height_factor;
 352                                 container->height *= container->rowspan;
 353
 354                                 /* Render the container if it is not empty */
 355                                 render_container(connection, container);
 356
 357                                 xoffset[rows] += container->width;
 358                                 yoffset[cols] += container->height;
 359                                 printf("==========\n");
 360                         }
 361
 362                 render_bars(connection, r_ws, width, height);
 363         }
 364
 365         xcb_flush(connection);
 366 }