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