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 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 "xinerama.h"
  28 #include "config.h"
  29 #include "floating.h"
  30
  31 /*
  32  * Renders the resize window between the first/second container and resizes
  33  * the table column/row.
  34  *
  35  */
  36 int resize_graphical_handler(xcb_connection_t *conn, Workspace *ws, int first, int second,
  37                              resize_orientation_t orientation, xcb_button_press_event_t *event) {
  38         int new_position;
  39         xcb_screen_t *root_screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
  40         i3Screen *screen = get_screen_containing(event->root_x, event->root_y);
  41         if (screen == NULL) {
  42                 LOG("BUG: No screen found at this position (%d, %d)\n", event->root_x, event->root_y);
  43                 return 1;
  44         }
  45
  46         LOG("event->event_x = %d, event->root_x = %d\n", event->event_x, event->root_x);
  47
  48         LOG("Screen dimensions: (%d, %d) %d x %d\n", screen->rect.x, screen->rect.y, screen->rect.width, screen->rect.height);
  49
  50         uint32_t mask = 0;
  51         uint32_t values[2];
  52
  53         mask = XCB_CW_OVERRIDE_REDIRECT;
  54         values[0] = 1;
  55
  56         /* Open a new window, the resizebar. Grab the pointer and move the window around
  57            as the user moves the pointer. */
  58         Rect grabrect = {0, 0, root_screen->width_in_pixels, root_screen->height_in_pixels};
  59         xcb_window_t grabwin = create_window(conn, grabrect, XCB_WINDOW_CLASS_INPUT_ONLY, -1, true, mask, values);
  60
  61         Rect helprect;
  62         if (orientation == O_VERTICAL) {
  63                 helprect.x = event->root_x;
  64                 helprect.y = screen->rect.y;
  65                 helprect.width = 2;
  66                 helprect.height = screen->rect.height;
  67                 new_position = event->root_x;
  68         } else {
  69                 helprect.x = 0;
  70                 helprect.y = event->root_y;
  71                 helprect.width = root_screen->width_in_pixels;
  72                 helprect.height = 2;
  73                 new_position = event->root_y;
  74         }
  75
  76         mask = XCB_CW_BACK_PIXEL;
  77         values[0] = config.client.focused.border;
  78
  79         mask |= XCB_CW_OVERRIDE_REDIRECT;
  80         values[1] = 1;
  81
  82         xcb_window_t helpwin = create_window(conn, helprect, XCB_WINDOW_CLASS_INPUT_OUTPUT,
  83                                              (orientation == O_VERTICAL ?
  84                                               XCB_CURSOR_SB_V_DOUBLE_ARROW :
  85                                               XCB_CURSOR_SB_H_DOUBLE_ARROW), true, mask, values);
  86
  87         xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin);
  88
  89         xcb_flush(conn);
  90
  91         void resize_callback(Rect *old_rect, uint32_t new_x, uint32_t new_y) {
  92                 LOG("new x = %d, y = %d\n", new_x, new_y);
  93                 if (orientation == O_VERTICAL) {
  94                         /* Check if the new coordinates are within screen boundaries */
  95                         if (new_x > (screen->rect.x + screen->rect.width - 25) ||
  96                             new_x < (screen->rect.x + 25))
  97                                 return;
  98
  99                         values[0] = new_position = new_x;
 100                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_X, values);
 101                 } else {
 102                         if (new_y > (screen->rect.y + screen->rect.height - 25) ||
 103                             new_y < (screen->rect.y + 25))
 104                                 return;
 105
 106                         values[0] = new_position = new_y;
 107                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_Y, values);
 108                 }
 109
 110                 xcb_flush(conn);
 111         }
 112
 113         drag_pointer(conn, NULL, event, grabwin, BORDER_TOP, resize_callback);
 114
 115         xcb_destroy_window(conn, helpwin);
 116         xcb_destroy_window(conn, grabwin);
 117         xcb_flush(conn);
 118
 119         /* TODO: refactor this, both blocks are very identical */
 120         if (orientation == O_VERTICAL) {
 121                 LOG("Resize was from X = %d to X = %d\n", event->root_x, new_position);
 122                 if (event->root_x == new_position) {
 123                         LOG("Nothing changed, not updating anything\n");
 124                         return 1;
 125                 }
 126
 127                 int default_width = ws->rect.width / ws->cols;
 128                 int old_unoccupied_x = get_unoccupied_x(ws);
 129
 130                 /* We pre-calculate the unoccupied space to see if we need to adapt sizes before
 131                  * doing the resize */
 132                 int new_unoccupied_x = old_unoccupied_x;
 133
 134                 if (old_unoccupied_x == 0)
 135                         old_unoccupied_x = ws->rect.width;
 136
 137                 if (ws->width_factor[first] == 0)
 138                         new_unoccupied_x += default_width;
 139
 140                 if (ws->width_factor[second] == 0)
 141                         new_unoccupied_x += default_width;
 142
 143                 LOG("\n\n\n");
 144                 LOG("old = %d, new = %d\n", old_unoccupied_x, new_unoccupied_x);
 145
 146                 /* If the space used for customly resized columns has changed we need to adapt the
 147                  * other customly resized columns, if any */
 148                 if (new_unoccupied_x != old_unoccupied_x)
 149                         for (int col = 0; col < ws->cols; col++) {
 150                                 if (ws->width_factor[col] == 0)
 151                                         continue;
 152
 153                                 LOG("Updating other column (%d) (current width_factor = %f)\n", col, ws->width_factor[col]);
 154                                 ws->width_factor[col] = (ws->width_factor[col] * old_unoccupied_x) / new_unoccupied_x;
 155                                 LOG("to %f\n", ws->width_factor[col]);
 156                         }
 157
 158                 LOG("old_unoccupied_x = %d\n", old_unoccupied_x);
 159
 160                 LOG("Updating first (before = %f)\n", ws->width_factor[first]);
 161                 /* Convert 0 (for default width_factor) to actual numbers */
 162                 if (ws->width_factor[first] == 0)
 163                         ws->width_factor[first] = ((float)ws->rect.width / ws->cols) / new_unoccupied_x;
 164
 165                 LOG("middle = %f\n", ws->width_factor[first]);
 166                 int old_width = ws->width_factor[first] * old_unoccupied_x;
 167                 LOG("first->width = %d, new_position = %d, event->root_x = %d\n", old_width, new_position, event->root_x);
 168                 ws->width_factor[first] *= (float)(old_width + (new_position - event->root_x)) / old_width;
 169                 LOG("-> %f\n", ws->width_factor[first]);
 170
 171
 172                 LOG("Updating second (before = %f)\n", ws->width_factor[second]);
 173                 if (ws->width_factor[second] == 0)
 174                         ws->width_factor[second] = ((float)ws->rect.width / ws->cols) / new_unoccupied_x;
 175                 LOG("middle = %f\n", ws->width_factor[second]);
 176                 old_width = ws->width_factor[second] * old_unoccupied_x;
 177                 LOG("second->width = %d, new_position = %d, event->root_x = %d\n", old_width, new_position, event->root_x);
 178                 ws->width_factor[second] *= (float)(old_width - (new_position - event->root_x)) / old_width;
 179                 LOG("-> %f\n", ws->width_factor[second]);
 180
 181                 LOG("new unoccupied_x = %d\n", get_unoccupied_x(ws));
 182
 183                 LOG("\n\n\n");
 184         } else {
 185                 LOG("Resize was from X = %d to X = %d\n", event->root_y, new_position);
 186                 if (event->root_y == new_position) {
 187                         LOG("Nothing changed, not updating anything\n");
 188                         return 1;
 189                 }
 190
 191                 int default_height = ws->rect.height / ws->rows;
 192                 int old_unoccupied_y = get_unoccupied_y(ws);
 193
 194                 /* We pre-calculate the unoccupied space to see if we need to adapt sizes before
 195                  * doing the resize */
 196                 int new_unoccupied_y = old_unoccupied_y;
 197
 198                 if (old_unoccupied_y == 0)
 199                         old_unoccupied_y = ws->rect.height;
 200
 201                 if (ws->height_factor[first] == 0)
 202                         new_unoccupied_y += default_height;
 203
 204                 if (ws->height_factor[second] == 0)
 205                         new_unoccupied_y += default_height;
 206
 207                 LOG("\n\n\n");
 208                 LOG("old = %d, new = %d\n", old_unoccupied_y, new_unoccupied_y);
 209
 210                 /* If the space used for customly resized columns has changed we need to adapt the
 211                  * other customly resized columns, if any */
 212                 if (new_unoccupied_y != old_unoccupied_y)
 213                         for (int row = 0; row < ws->rows; row++) {
 214                                 if (ws->height_factor[row] == 0)
 215                                         continue;
 216
 217                                 LOG("Updating other column (%d) (current width_factor = %f)\n", row, ws->height_factor[row]);
 218                                 ws->height_factor[row] = (ws->height_factor[row] * old_unoccupied_y) / new_unoccupied_y;
 219                                 LOG("to %f\n", ws->height_factor[row]);
 220                         }
 221
 222                 LOG("old_unoccupied_y = %d\n", old_unoccupied_y);
 223
 224                 LOG("Updating first (before = %f)\n", ws->height_factor[first]);
 225                 /* Convert 0 (for default width_factor) to actual numbers */
 226                 if (ws->height_factor[first] == 0)
 227                         ws->height_factor[first] = ((float)ws->rect.height / ws->rows) / new_unoccupied_y;
 228
 229                 LOG("middle = %f\n", ws->height_factor[first]);
 230                 int old_height = ws->height_factor[first] * old_unoccupied_y;
 231                 LOG("first->width = %d, new_position = %d, event->root_x = %d\n", old_height, new_position, event->root_y);
 232                 ws->height_factor[first] *= (float)(old_height + (new_position - event->root_y)) / old_height;
 233                 LOG("-> %f\n", ws->height_factor[first]);
 234
 235
 236                 LOG("Updating second (before = %f)\n", ws->height_factor[second]);
 237                 if (ws->height_factor[second] == 0)
 238                         ws->height_factor[second] = ((float)ws->rect.height / ws->rows) / new_unoccupied_y;
 239                 LOG("middle = %f\n", ws->height_factor[second]);
 240                 old_height = ws->height_factor[second] * old_unoccupied_y;
 241                 LOG("second->width = %d, new_position = %d, event->root_x = %d\n", old_height, new_position, event->root_y);
 242                 ws->height_factor[second] *= (float)(old_height - (new_position - event->root_y)) / old_height;
 243                 LOG("-> %f\n", ws->height_factor[second]);
 244
 245                 LOG("new unoccupied_y = %d\n", get_unoccupied_y(ws));
 246
 247                 LOG("\n\n\n");
 248         }
 249
 250         render_layout(conn);
 251
 252         return 1;
 253 }