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

   1 /*
   2  * vim:ts=8:expandtab
   3  *
   4  * i3 - an improved dynamic tiling window manager
   5  *
   6  * © 2009-2010 Michael Stapelberg and contributors
   7  *
   8  * See file LICENSE for license information.
   9  *
  10  * This file contains the functions for resizing table columns/rows because
  11  * it’s actually lots of work, compared to the other handlers.
  12  *
  13  */
  14 #include <stdlib.h>
  15 #include <assert.h>
  16
  17 #include <xcb/xcb.h>
  18 #include <xcb/xcb_event.h>
  19
  20 #include "i3.h"
  21 #include "data.h"
  22 #include "resize.h"
  23 #include "util.h"
  24 #include "xcb.h"
  25 #include "debug.h"
  26 #include "layout.h"
  27 #include "randr.h"
  28 #include "config.h"
  29 #include "floating.h"
  30 #include "workspace.h"
  31 #include "log.h"
  32
  33 /*
  34  * This is an ugly data structure which we need because there is no standard
  35  * way of having nested functions (only available as a gcc extension at the
  36  * moment, clang doesn’t support it) or blocks (only available as a clang
  37  * extension and only on Mac OS X systems at the moment).
  38  *
  39  */
  40 struct callback_params {
  41         resize_orientation_t orientation;
  42         Output *screen;
  43         xcb_window_t helpwin;
  44         uint32_t *new_position;
  45 };
  46
  47 DRAGGING_CB(resize_callback) {
  48         struct callback_params *params = extra;
  49         Output *screen = params->screen;
  50         DLOG("new x = %d, y = %d\n", new_x, new_y);
  51         if (params->orientation == O_VERTICAL) {
  52                 /* Check if the new coordinates are within screen boundaries */
  53                 if (new_x > (screen->rect.x + screen->rect.width - 25) ||
  54                     new_x < (screen->rect.x + 25))
  55                         return;
  56
  57                 *(params->new_position) = new_x;
  58                 xcb_configure_window(conn, params->helpwin, XCB_CONFIG_WINDOW_X, params->new_position);
  59         } else {
  60                 if (new_y > (screen->rect.y + screen->rect.height - 25) ||
  61                     new_y < (screen->rect.y + 25))
  62                         return;
  63
  64                 *(params->new_position) = new_y;
  65                 xcb_configure_window(conn, params->helpwin, XCB_CONFIG_WINDOW_Y, params->new_position);
  66         }
  67
  68         xcb_flush(conn);
  69 }
  70
  71 /*
  72  * Renders the resize window between the first/second container and resizes
  73  * the table column/row.
  74  *
  75  */
  76 int resize_graphical_handler(xcb_connection_t *conn, Workspace *ws, int first, int second,
  77                              resize_orientation_t orientation, xcb_button_press_event_t *event) {
  78         uint32_t new_position;
  79         Output *screen = get_output_containing(event->root_x, event->root_y);
  80         if (screen == NULL) {
  81                 ELOG("BUG: No screen found at this position (%d, %d)\n", event->root_x, event->root_y);
  82                 return 1;
  83         }
  84
  85         /* We cannot use the X root window's width_in_pixels or height_in_pixels
  86          * attributes here since they are not updated when you configure new
  87          * screens during runtime. Instead, we just use the most right and most
  88          * bottom Xinerama screen and use their position + width/height to get
  89          * the area of pixels currently in use */
  90         Output *most_right = get_output_most(D_RIGHT, screen),
  91                *most_bottom = get_output_most(D_DOWN, screen);
  92
  93         DLOG("event->event_x = %d, event->root_x = %d\n", event->event_x, event->root_x);
  94
  95         DLOG("Screen dimensions: (%d, %d) %d x %d\n", screen->rect.x, screen->rect.y, screen->rect.width, screen->rect.height);
  96
  97         uint32_t mask = 0;
  98         uint32_t values[2];
  99
 100         mask = XCB_CW_OVERRIDE_REDIRECT;
 101         values[0] = 1;
 102
 103         /* Open a new window, the resizebar. Grab the pointer and move the window around
 104            as the user moves the pointer. */
 105         Rect grabrect = {0,
 106                          0,
 107                          most_right->rect.x + most_right->rect.width,
 108                          most_bottom->rect.x + most_bottom->rect.height};
 109         xcb_window_t grabwin = create_window(conn, grabrect, XCB_WINDOW_CLASS_INPUT_ONLY, -1, true, mask, values);
 110
 111         Rect helprect;
 112         if (orientation == O_VERTICAL) {
 113                 helprect.x = event->root_x;
 114                 helprect.y = screen->rect.y;
 115                 helprect.width = 2;
 116                 helprect.height = screen->rect.height;
 117                 new_position = event->root_x;
 118         } else {
 119                 helprect.x = screen->rect.x;
 120                 helprect.y = event->root_y;
 121                 helprect.width = screen->rect.width;
 122                 helprect.height = 2;
 123                 new_position = event->root_y;
 124         }
 125
 126         mask = XCB_CW_BACK_PIXEL;
 127         values[0] = config.client.focused.border;
 128
 129         mask |= XCB_CW_OVERRIDE_REDIRECT;
 130         values[1] = 1;
 131
 132         xcb_window_t helpwin = create_window(conn, helprect, XCB_WINDOW_CLASS_INPUT_OUTPUT,
 133                                              (orientation == O_VERTICAL ?
 134                                               XCB_CURSOR_SB_H_DOUBLE_ARROW :
 135                                               XCB_CURSOR_SB_V_DOUBLE_ARROW), true, mask, values);
 136
 137         xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin);
 138
 139         xcb_flush(conn);
 140
 141         struct callback_params params = { orientation, screen, helpwin, &new_position };
 142
 143         drag_pointer(conn, NULL, event, grabwin, BORDER_TOP, resize_callback, &params);
 144
 145         xcb_destroy_window(conn, helpwin);
 146         xcb_destroy_window(conn, grabwin);
 147         xcb_flush(conn);
 148
 149         int pixels;
 150         if (orientation == O_VERTICAL)
 151                 pixels = (new_position - event->root_x);
 152         else pixels = (new_position - event->root_y);
 153         resize_container(conn, ws, first, second, orientation, pixels);
 154
 155         return 1;
 156 }
 157
 158 /*
 159  * Resizes a column/row by the given amount of pixels. Called by
 160  * resize_graphical_handler (the user clicked) or parse_resize_command (the
 161  * user issued the command)
 162  *
 163  */
 164 void resize_container(xcb_connection_t *conn, Workspace *ws, int first, int second,
 165                       resize_orientation_t orientation, int pixels) {
 166
 167         /* TODO: refactor this, both blocks are very identical */
 168         if (orientation == O_VERTICAL) {
 169                 int default_width = ws->rect.width / ws->cols;
 170                 int old_unoccupied_x = get_unoccupied_x(ws);
 171
 172                 /* We pre-calculate the unoccupied space to see if we need to adapt sizes before
 173                  * doing the resize */
 174                 int new_unoccupied_x = old_unoccupied_x;
 175
 176                 if (old_unoccupied_x == 0)
 177                         old_unoccupied_x = ws->rect.width;
 178
 179                 if (ws->width_factor[first] == 0)
 180                         new_unoccupied_x += default_width;
 181
 182                 if (ws->width_factor[second] == 0)
 183                         new_unoccupied_x += default_width;
 184
 185                 DLOG("\n\n\n");
 186                 DLOG("old = %d, new = %d\n", old_unoccupied_x, new_unoccupied_x);
 187
 188                 int cols_without_wf = 0;
 189                 int old_width, old_second_width;
 190                 for (int col = 0; col < ws->cols; col++)
 191                         if (ws->width_factor[col] == 0)
 192                                 cols_without_wf++;
 193
 194                 DLOG("old_unoccupied_x = %d\n", old_unoccupied_x);
 195
 196                 DLOG("Updating first (before = %f)\n", ws->width_factor[first]);
 197                 /* Convert 0 (for default width_factor) to actual numbers */
 198                 if (ws->width_factor[first] == 0)
 199                         old_width = (old_unoccupied_x / max(cols_without_wf, 1));
 200                 else old_width = ws->width_factor[first] * old_unoccupied_x;
 201
 202                 DLOG("second (before = %f)\n", ws->width_factor[second]);
 203                 if (ws->width_factor[second] == 0)
 204                         old_second_width = (old_unoccupied_x / max(cols_without_wf, 1));
 205                 else old_second_width = ws->width_factor[second] * old_unoccupied_x;
 206
 207                 DLOG("middle = %f\n", ws->width_factor[first]);
 208
 209                 /* If the space used for customly resized columns has changed we need to adapt the
 210                  * other customly resized columns, if any */
 211                 if (new_unoccupied_x != old_unoccupied_x)
 212                         for (int col = 0; col < ws->cols; col++) {
 213                                 if (ws->width_factor[col] == 0)
 214                                         continue;
 215
 216                                 DLOG("Updating other column (%d) (current width_factor = %f)\n", col, ws->width_factor[col]);
 217                                 ws->width_factor[col] = (ws->width_factor[col] * old_unoccupied_x) / new_unoccupied_x;
 218                                 DLOG("to %f\n", ws->width_factor[col]);
 219                         }
 220
 221                 DLOG("Updating first (before = %f)\n", ws->width_factor[first]);
 222                 /* Convert 0 (for default width_factor) to actual numbers */
 223                 if (ws->width_factor[first] == 0)
 224                         ws->width_factor[first] = ((float)ws->rect.width / ws->cols) / new_unoccupied_x;
 225
 226                 DLOG("first->width = %d, pixels = %d\n", old_width, pixels);
 227                 ws->width_factor[first] *= (float)(old_width + pixels) / old_width;
 228                 DLOG("-> %f\n", ws->width_factor[first]);
 229
 230
 231                 DLOG("Updating second (before = %f)\n", ws->width_factor[second]);
 232                 if (ws->width_factor[second] == 0)
 233                         ws->width_factor[second] = ((float)ws->rect.width / ws->cols) / new_unoccupied_x;
 234
 235                 DLOG("middle = %f\n", ws->width_factor[second]);
 236                 DLOG("second->width = %d, pixels = %d\n", old_second_width, pixels);
 237                 ws->width_factor[second] *= (float)(old_second_width - pixels) / old_second_width;
 238                 DLOG("-> %f\n", ws->width_factor[second]);
 239
 240                 DLOG("new unoccupied_x = %d\n", get_unoccupied_x(ws));
 241
 242                 DLOG("\n\n\n");
 243         } else {
 244                 int ws_height = workspace_height(ws);
 245                 int default_height = ws_height / ws->rows;
 246                 int old_unoccupied_y = get_unoccupied_y(ws);
 247
 248                 /* We pre-calculate the unoccupied space to see if we need to adapt sizes before
 249                  * doing the resize */
 250                 int new_unoccupied_y = old_unoccupied_y;
 251
 252                 if (old_unoccupied_y == 0)
 253                         old_unoccupied_y = ws_height;
 254
 255                 if (ws->height_factor[first] == 0)
 256                         new_unoccupied_y += default_height;
 257
 258                 if (ws->height_factor[second] == 0)
 259                         new_unoccupied_y += default_height;
 260
 261                 int cols_without_hf = 0;
 262                 int old_height, old_second_height;
 263                 for (int row = 0; row < ws->rows; row++)
 264                         if (ws->height_factor[row] == 0)
 265                                 cols_without_hf++;
 266
 267                 DLOG("old_unoccupied_y = %d\n", old_unoccupied_y);
 268
 269                 DLOG("Updating first (before = %f)\n", ws->height_factor[first]);
 270
 271                 /* Convert 0 (for default width_factor) to actual numbers */
 272                 if (ws->height_factor[first] == 0)
 273                         old_height = (old_unoccupied_y / max(cols_without_hf, 1));
 274                 else old_height = ws->height_factor[first] * old_unoccupied_y;
 275
 276                 DLOG("second (before = %f)\n", ws->height_factor[second]);
 277                 if (ws->height_factor[second] == 0)
 278                         old_second_height = (old_unoccupied_y / max(cols_without_hf, 1));
 279                 else old_second_height = ws->height_factor[second] * old_unoccupied_y;
 280
 281                 DLOG("middle = %f\n", ws->height_factor[first]);
 282
 283
 284                 DLOG("\n\n\n");
 285                 DLOG("old = %d, new = %d\n", old_unoccupied_y, new_unoccupied_y);
 286
 287                 /* If the space used for customly resized columns has changed we need to adapt the
 288                  * other customly resized columns, if any */
 289                 if (new_unoccupied_y != old_unoccupied_y)
 290                         for (int row = 0; row < ws->rows; row++) {
 291                                 if (ws->height_factor[row] == 0)
 292                                         continue;
 293
 294                                 DLOG("Updating other column (%d) (current width_factor = %f)\n", row, ws->height_factor[row]);
 295                                 ws->height_factor[row] = (ws->height_factor[row] * old_unoccupied_y) / new_unoccupied_y;
 296                                 DLOG("to %f\n", ws->height_factor[row]);
 297                         }
 298
 299
 300                 DLOG("Updating first (before = %f)\n", ws->height_factor[first]);
 301                 /* Convert 0 (for default width_factor) to actual numbers */
 302                 if (ws->height_factor[first] == 0)
 303                         ws->height_factor[first] = ((float)ws_height / ws->rows) / new_unoccupied_y;
 304
 305                 DLOG("first->width = %d, pixels = %d\n", old_height, pixels);
 306                 ws->height_factor[first] *= (float)(old_height + pixels) / old_height;
 307                 DLOG("-> %f\n", ws->height_factor[first]);
 308
 309
 310                 DLOG("Updating second (before = %f)\n", ws->height_factor[second]);
 311                 if (ws->height_factor[second] == 0)
 312                         ws->height_factor[second] = ((float)ws_height / ws->rows) / new_unoccupied_y;
 313                 DLOG("middle = %f\n", ws->height_factor[second]);
 314                 DLOG("second->width = %d, pixels = %d\n", old_second_height, pixels);
 315                 ws->height_factor[second] *= (float)(old_second_height - pixels) / old_second_height;
 316                 DLOG("-> %f\n", ws->height_factor[second]);
 317
 318                 DLOG("new unoccupied_y = %d\n", get_unoccupied_y(ws));
 319
 320                 DLOG("\n\n\n");
 321         }
 322
 323         render_layout(conn);
 324 }