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         /* FIXME: horizontal resizing causes empty spaces to exist */
  51         if (orientation == O_HORIZONTAL) {
  52                 LOG("Sorry, horizontal resizing is not yet activated due to creating layout bugs."
  53                     "If you are brave, enable the code for yourself and try fixing it.\n");
  54                 return 1;
  55         }
  56
  57         uint32_t mask = 0;
  58         uint32_t values[2];
  59
  60         mask = XCB_CW_OVERRIDE_REDIRECT;
  61         values[0] = 1;
  62
  63         /* Open a new window, the resizebar. Grab the pointer and move the window around
  64            as the user moves the pointer. */
  65         Rect grabrect = {0, 0, root_screen->width_in_pixels, root_screen->height_in_pixels};
  66         xcb_window_t grabwin = create_window(conn, grabrect, XCB_WINDOW_CLASS_INPUT_ONLY, -1, true, mask, values);
  67
  68         Rect helprect;
  69         if (orientation == O_VERTICAL) {
  70                 helprect.x = event->root_x;
  71                 helprect.y = screen->rect.y;
  72                 helprect.width = 2;
  73                 helprect.height = screen->rect.height;
  74                 new_position = event->root_x;
  75         } else {
  76                 helprect.x = 0;
  77                 helprect.y = event->root_y;
  78                 helprect.width = root_screen->width_in_pixels;
  79                 helprect.height = 2;
  80                 new_position = event->root_y;
  81         }
  82
  83         mask = XCB_CW_BACK_PIXEL;
  84         values[0] = config.client.focused.border;
  85
  86         mask |= XCB_CW_OVERRIDE_REDIRECT;
  87         values[1] = 1;
  88
  89         xcb_window_t helpwin = create_window(conn, helprect, XCB_WINDOW_CLASS_INPUT_OUTPUT,
  90                                              (orientation == O_VERTICAL ?
  91                                               XCB_CURSOR_SB_V_DOUBLE_ARROW :
  92                                               XCB_CURSOR_SB_H_DOUBLE_ARROW), true, mask, values);
  93
  94         xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin);
  95
  96         xcb_flush(conn);
  97
  98         void resize_callback(Rect *old_rect, uint32_t new_x, uint32_t new_y) {
  99                 LOG("new x = %d, y = %d\n", new_x, new_y);
 100                 if (orientation == O_VERTICAL) {
 101                         /* Check if the new coordinates are within screen boundaries */
 102                         if (new_x > (screen->rect.x + screen->rect.width - 25) ||
 103                             new_x < (screen->rect.x + 25))
 104                                 return;
 105
 106                         values[0] = new_position = new_x;
 107                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_X, values);
 108                 } else {
 109                         if (new_y > (screen->rect.y + screen->rect.height - 25) ||
 110                             new_y < (screen->rect.y + 25))
 111                                 return;
 112
 113                         values[0] = new_position = new_y;
 114                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_Y, values);
 115                 }
 116
 117                 xcb_flush(conn);
 118         }
 119
 120         drag_pointer(conn, NULL, event, grabwin, BORDER_TOP, resize_callback);
 121
 122         xcb_destroy_window(conn, helpwin);
 123         xcb_destroy_window(conn, grabwin);
 124         xcb_flush(conn);
 125
 126         if (orientation == O_VERTICAL) {
 127                 LOG("Resize was from X = %d to X = %d\n", event->root_x, new_position);
 128                 if (event->root_x == new_position) {
 129                         LOG("Nothing changed, not updating anything\n");
 130                         return 1;
 131                 }
 132
 133                 int default_width = ws->rect.width / ws->cols;
 134                 int old_unoccupied_x = get_unoccupied_x(ws);
 135
 136                 /* We pre-calculate the unoccupied space to see if we need to adapt sizes before
 137                  * doing the resize */
 138                 int new_unoccupied_x = old_unoccupied_x;
 139
 140                 if (old_unoccupied_x == 0)
 141                         old_unoccupied_x = ws->rect.width;
 142
 143                 if (ws->width_factor[first] == 0)
 144                         new_unoccupied_x += default_width;
 145
 146                 if (ws->width_factor[second] == 0)
 147                         new_unoccupied_x += default_width;
 148
 149                 LOG("\n\n\n");
 150                 LOG("old = %d, new = %d\n", old_unoccupied_x, new_unoccupied_x);
 151
 152                 /* If the space used for customly resized columns has changed we need to adapt the
 153                  * other customly resized columns, if any */
 154                 if (new_unoccupied_x != old_unoccupied_x)
 155                         for (int col = 0; col < ws->cols; col++) {
 156                                 if (ws->width_factor[col] == 0)
 157                                         continue;
 158
 159                                 LOG("Updating other column (%d) (current width_factor = %f)\n", col, ws->width_factor[col]);
 160                                 ws->width_factor[col] = (ws->width_factor[col] * old_unoccupied_x) / new_unoccupied_x;
 161                                 LOG("to %f\n", ws->width_factor[col]);
 162                         }
 163
 164                 LOG("old_unoccupied_x = %d\n", old_unoccupied_x);
 165
 166                 LOG("Updating first (before = %f)\n", ws->width_factor[first]);
 167                 /* Convert 0 (for default width_factor) to actual numbers */
 168                 if (ws->width_factor[first] == 0)
 169                         ws->width_factor[first] = ((float)ws->rect.width / ws->cols) / new_unoccupied_x;
 170
 171                 LOG("middle = %f\n", ws->width_factor[first]);
 172                 int old_width = ws->width_factor[first] * old_unoccupied_x;
 173                 LOG("first->width = %d, new_position = %d, event->root_x = %d\n", old_width, new_position, event->root_x);
 174                 ws->width_factor[first] *= (float)(old_width + (new_position - event->root_x)) / old_width;
 175                 LOG("-> %f\n", ws->width_factor[first]);
 176
 177
 178                 LOG("Updating second (before = %f)\n", ws->width_factor[second]);
 179                 if (ws->width_factor[second] == 0)
 180                         ws->width_factor[second] = ((float)ws->rect.width / ws->cols) / new_unoccupied_x;
 181                 LOG("middle = %f\n", ws->width_factor[second]);
 182                 old_width = ws->width_factor[second] * old_unoccupied_x;
 183                 LOG("second->width = %d, new_position = %d, event->root_x = %d\n", old_width, new_position, event->root_x);
 184                 ws->width_factor[second] *= (float)(old_width - (new_position - event->root_x)) / old_width;
 185                 LOG("-> %f\n", ws->width_factor[second]);
 186
 187                 LOG("new unoccupied_x = %d\n", get_unoccupied_x(ws));
 188
 189                 LOG("\n\n\n");
 190         } else {
 191 #if 0
 192                 LOG("Resize was from Y = %d to Y = %d\n", event->root_y, new_position);
 193                 if (event->root_y == new_position) {
 194                         LOG("Nothing changed, not updating anything\n");
 195                         return 1;
 196                 }
 197
 198                 /* Convert 0 (for default height_factor) to actual numbers */
 199                 if (first->height_factor == 0)
 200                         first->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 201                 if (second->height_factor == 0)
 202                         second->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 203
 204                 first->height_factor *= (float)(first->height + (new_position - event->root_y)) / first->height;
 205                 second->height_factor *= (float)(second->height - (new_position - event->root_y)) / second->height;
 206 #endif
 207         }
 208
 209         render_layout(conn);
 210
 211         return 1;
 212 }