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 "font.h"
  20 #include "i3.h"
  21 #include "xcb.h"
  22 #include "table.h"
  23 #include "util.h"
  24 #include "xinerama.h"
  25
  26 /*
  27  * Gets the unoccupied space (= space which is available for windows which were resized by the user)
  28  * for the given row. This is necessary to render both, customly resized windows and never touched
  29  * windows correctly, meaning that the aspect ratio will be maintained when opening new windows.
  30  *
  31  */
  32 int get_unoccupied_x(Workspace *workspace, int row) {
  33         int unoccupied = workspace->rect.width;
  34         float default_factor = ((float)workspace->rect.width / workspace->cols) / workspace->rect.width;
  35
  36         printf("get_unoccupied_x(), starting with %d, default_factor = %f\n", unoccupied, default_factor);
  37
  38         for (int cols = 0; cols < workspace->cols;) {
  39                 Container *con = workspace->table[cols][row];
  40                 printf("width_factor[%d][%d] = %f, colspan = %d\n", cols, row, con->width_factor, con->colspan);
  41                 if (con->width_factor == 0)
  42                         unoccupied -= workspace->rect.width * default_factor * con->colspan;
  43                 cols += con->colspan;
  44         }
  45
  46         assert(unoccupied != 0);
  47
  48         printf("unoccupied space: %d\n", unoccupied);
  49         return unoccupied;
  50 }
  51
  52 /* See get_unoccupied_x() */
  53 int get_unoccupied_y(Workspace *workspace, int col) {
  54         int unoccupied = workspace->rect.height;
  55         float default_factor = ((float)workspace->rect.height / workspace->rows) / workspace->rect.height;
  56
  57         printf("get_unoccupied_y(), starting with %d, default_factor = %f\n", unoccupied, default_factor);
  58
  59         for (int rows = 0; rows < workspace->rows;) {
  60                 Container *con = workspace->table[col][rows];
  61                 printf("height_factor[%d][%d] = %f, rowspan %d\n", col, rows, con->height_factor, con->rowspan);
  62                 if (con->height_factor == 0)
  63                         unoccupied -= workspace->rect.height * default_factor * con->rowspan;
  64                 rows += con->rowspan;
  65         }
  66
  67         assert(unoccupied != 0);
  68
  69         printf("unoccupied space: %d\n", unoccupied);
  70         return unoccupied;
  71 }
  72
  73 /*
  74  * (Re-)draws window decorations for a given Client onto the given drawable/graphic context.
  75  * When in stacking mode, the window decorations are drawn onto an own window.
  76  *
  77  */
  78 void decorate_window(xcb_connection_t *conn, Client *client, xcb_drawable_t drawable, xcb_gcontext_t gc, int offset) {
  79         i3Font *font = load_font(conn, pattern);
  80         uint32_t background_color,
  81                  text_color,
  82                  border_color;
  83
  84         /* Clients without a container (docks) won’t get decorated */
  85         if (client->container == NULL)
  86                 return;
  87
  88         if (client->container->currently_focused == client) {
  89                 background_color = get_colorpixel(conn, client, client->frame, "#285577");
  90                 text_color = get_colorpixel(conn, client, client->frame, "#ffffff");
  91                 border_color = get_colorpixel(conn, client, client->frame, "#4c7899");
  92         } else {
  93                 background_color = get_colorpixel(conn, client, client->frame, "#222222");
  94                 text_color = get_colorpixel(conn, client, client->frame, "#888888");
  95                 border_color = get_colorpixel(conn, client, client->frame, "#333333");
  96         }
  97
  98         /* Our plan is the following:
  99            - Draw a rect around the whole client in background_color
 100            - Draw two lines in a lighter color
 101            - Draw the window’s title
 102          */
 103
 104         /* Draw a green rectangle around the window */
 105         xcb_change_gc_single(conn, gc, XCB_GC_FOREGROUND, background_color);
 106
 107         xcb_rectangle_t rect = {0, offset, client->rect.width, offset + client->rect.height};
 108         xcb_poly_fill_rectangle(conn, drawable, gc, 1, &rect);
 109
 110         /* Draw the lines */
 111         xcb_draw_line(conn, drawable, gc, border_color, 2, offset, client->rect.width, offset);
 112         xcb_draw_line(conn, drawable, gc, border_color, 2, offset + font->height + 3,
 113                       2 + client->rect.width, offset + font->height + 3);
 114
 115         /* Draw the font */
 116         uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_FONT;
 117         uint32_t values[] = { text_color, background_color, font->id };
 118         xcb_change_gc(conn, gc, mask, values);
 119
 120         /* TODO: utf8? */
 121         char *label;
 122         asprintf(&label, "(%08x) %.*s", client->frame, client->name_len, client->name);
 123         xcb_void_cookie_t text_cookie = xcb_image_text_8_checked(conn, strlen(label), drawable,
 124                                         gc, 3 /* X */, offset + font->height /* Y = baseline of font */, label);
 125         check_error(conn, text_cookie, "Could not draw client's title");
 126         free(label);
 127 }
 128
 129 /*
 130  * Pushes the client’s x and y coordinates to X11
 131  *
 132  */
 133 static void reposition_client(xcb_connection_t *connection, Client *client) {
 134         printf("frame needs to be pushed to %dx%d\n", client->rect.x, client->rect.y);
 135         /* Note: We can use a pointer to client->x like an array of uint32_ts
 136            because it is followed by client->y by definition */
 137         xcb_configure_window(connection, client->frame,
 138                         XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, &(client->rect.x));
 139 }
 140
 141 /*
 142  * Pushes the client’s width/height to X11 and resizes the child window
 143  *
 144  */
 145 static void resize_client(xcb_connection_t *connection, Client *client) {
 146         i3Font *font = load_font(connection, pattern);
 147
 148         printf("resizing client to %d x %d\n", client->rect.width, client->rect.height);
 149         xcb_configure_window(connection, client->frame,
 150                         XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT,
 151                         &(client->rect.width));
 152
 153         /* Adjust the position of the child inside its frame.
 154          * The coordinates of the child are relative to its frame, we
 155          * add a border of 2 pixel to each value */
 156         uint32_t mask = XCB_CONFIG_WINDOW_X |
 157                         XCB_CONFIG_WINDOW_Y |
 158                         XCB_CONFIG_WINDOW_WIDTH |
 159                         XCB_CONFIG_WINDOW_HEIGHT;
 160         Rect rect;
 161         if (client->titlebar_position == TITLEBAR_OFF ||
 162             client->container->mode == MODE_STACK) {
 163                 rect.x = 0;
 164                 rect.y = 0;
 165                 rect.width = client->rect.width;
 166                 rect.height = client->rect.height;
 167         } else {
 168                 rect.x = 2;
 169                 rect.y = font->height + 2 + 2;
 170                 rect.width = client->rect.width - (2 + 2);
 171                 rect.height = client->rect.height - ((font->height + 2 + 2) + 2);
 172         }
 173
 174         printf("child will be at %dx%d with size %dx%d\n", rect.x, rect.y, rect.width, rect.height);
 175
 176         xcb_configure_window(connection, client->child, mask, &(rect.x));
 177 }
 178
 179 /*
 180  * Renders the given container. Is called by render_layout() or individually (for example
 181  * when focus changes in a stacking container)
 182  *
 183  */
 184 void render_container(xcb_connection_t *connection, Container *container) {
 185         Client *client;
 186         int num_clients = 0, current_client = 0;
 187
 188         if (container->currently_focused == NULL)
 189                 return;
 190
 191         CIRCLEQ_FOREACH(client, &(container->clients), clients)
 192                 num_clients++;
 193
 194         if (container->mode == MODE_DEFAULT) {
 195                 printf("got %d clients in this default container.\n", num_clients);
 196                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 197                         /* Check if we changed client->x or client->y by updating it.
 198                          * Note the bitwise OR instead of logical OR to force evaluation of both statements */
 199                         if (client->force_reconfigure |
 200                             (client->rect.x != (client->rect.x = container->x)) |
 201                             (client->rect.y != (client->rect.y = container->y +
 202                                           (container->height / num_clients) * current_client))) {
 203                                 reposition_client(connection, client);
 204                         }
 205
 206                         /* TODO: vertical default layout */
 207                         if (client->force_reconfigure |
 208                             (client->rect.width != (client->rect.width = container->width)) |
 209                             (client->rect.height != (client->rect.height = container->height / num_clients))) {
 210                                 resize_client(connection, client);
 211                         }
 212
 213                         if (client->force_reconfigure)
 214                                 client->force_reconfigure = false;
 215
 216                         current_client++;
 217                 }
 218         } else {
 219                 i3Font *font = load_font(connection, pattern);
 220                 int decoration_height = (font->height + 2 + 2);
 221                 struct Stack_Window *stack_win = &(container->stack_win);
 222
 223                 /* Check if we need to reconfigure our stack title window */
 224                 if ((stack_win->width != (stack_win->width = container->width)) |
 225                     (stack_win->height != (stack_win->height = decoration_height * num_clients)))
 226                         xcb_configure_window(connection, stack_win->window,
 227                                 XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT, &(stack_win->width));
 228
 229                 /* All clients are repositioned */
 230                 CIRCLEQ_FOREACH(client, &(container->clients), clients) {
 231                         /* Check if we changed client->x or client->y by updating it.
 232                          * Note the bitwise OR instead of logical OR to force evaluation of both statements */
 233                         if (client->force_reconfigure |
 234                             (client->rect.x != (client->rect.x = container->x)) |
 235                             (client->rect.y != (client->rect.y = container->y + (decoration_height * num_clients))))
 236                                 reposition_client(connection, client);
 237
 238                         if (client->force_reconfigure |
 239                             (client->rect.width != (client->rect.width = container->width)) |
 240                             (client->rect.height !=
 241                              (client->rect.height = container->height - (decoration_height * num_clients))))
 242                                 resize_client(connection, client);
 243
 244                         client->force_reconfigure = false;
 245
 246                         decorate_window(connection, client, stack_win->window, stack_win->gc,
 247                                         current_client * decoration_height);
 248                         current_client++;
 249                 }
 250
 251                 /* Raise the focused window */
 252                 uint32_t values[] = { XCB_STACK_MODE_ABOVE };
 253                 xcb_configure_window(connection, container->currently_focused->frame,
 254                                      XCB_CONFIG_WINDOW_STACK_MODE, values);
 255         }
 256 }
 257
 258 static void render_bars(xcb_connection_t *connection, Workspace *r_ws, int width, int height) {
 259         Client *client;
 260         SLIST_FOREACH(client, &(r_ws->dock_clients), dock_clients) {
 261                 if (client->force_reconfigure |
 262                     (client->rect.x != (client->rect.x = 0)) |
 263                     (client->rect.y != (client->rect.y = height)))
 264                         reposition_client(connection, client);
 265
 266                 if (client->force_reconfigure |
 267                     (client->rect.width != (client->rect.width = width)) |
 268                     (client->rect.height != (client->rect.height = client->desired_height)))
 269                         resize_client(connection, client);
 270
 271                 client->force_reconfigure = false;
 272                 height += client->desired_height;
 273         }
 274 }
 275
 276 void render_layout(xcb_connection_t *connection) {
 277         i3Screen *screen;
 278
 279         TAILQ_FOREACH(screen, &virtual_screens, screens) {
 280                 /* r_ws (rendering workspace) is just a shortcut to the Workspace being currently rendered */
 281                 Workspace *r_ws = &(workspaces[screen->current_workspace]);
 282
 283                 printf("Rendering screen %d\n", screen->num);
 284                 if (r_ws->fullscreen_client != NULL)
 285                         /* This is easy: A client has entered fullscreen mode, so we don’t render at all */
 286                         continue;
 287
 288                 int width = r_ws->rect.width;
 289                 int height = r_ws->rect.height;
 290
 291                 /* Reserve space for dock clients */
 292                 Client *client;
 293                 SLIST_FOREACH(client, &(r_ws->dock_clients), dock_clients)
 294                         height -= client->desired_height;
 295
 296                 printf("got %d rows and %d cols\n", r_ws->rows, r_ws->cols);
 297
 298                 int xoffset[r_ws->rows];
 299                 int yoffset[r_ws->cols];
 300                 /* Initialize offsets */
 301                 for (int cols = 0; cols < r_ws->cols; cols++)
 302                         yoffset[cols] = r_ws->rect.y;
 303                 for (int rows = 0; rows < r_ws->rows; rows++)
 304                         xoffset[rows] = r_ws->rect.x;
 305
 306                 /* Go through the whole table and render what’s necessary */
 307                 for (int cols = 0; cols < r_ws->cols; cols++)
 308                         for (int rows = 0; rows < r_ws->rows; rows++) {
 309                                 Container *container = r_ws->table[cols][rows];
 310                                 printf("\n========\ncontainer has %d colspan, %d rowspan\n",
 311                                                 container->colspan, container->rowspan);
 312                                 printf("container at %d, %d\n", xoffset[rows], yoffset[cols]);
 313                                 /* Update position of the container */
 314                                 container->row = rows;
 315                                 container->col = cols;
 316                                 container->x = xoffset[rows];
 317                                 container->y = yoffset[cols];
 318
 319                                 if (container->width_factor == 0)
 320                                         container->width = (width / r_ws->cols);
 321                                 else container->width = get_unoccupied_x(r_ws, rows) * container->width_factor;
 322                                 container->width *= container->colspan;
 323
 324                                 if (container->height_factor == 0)
 325                                         container->height = (height / r_ws->rows);
 326                                 else container->height = get_unoccupied_y(r_ws, cols) * container->height_factor;
 327                                 container->height *= container->rowspan;
 328
 329                                 /* Render the container if it is not empty */
 330                                 render_container(connection, container);
 331
 332                                 xoffset[rows] += container->width;
 333                                 yoffset[cols] += container->height;
 334                                 printf("==========\n");
 335                         }
 336
 337                 render_bars(connection, r_ws, width, height);
 338         }
 339
 340         xcb_flush(connection);
 341 }