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         i3Screen *screen = get_screen_containing(event->root_x, event->root_y);
  40         if (screen == NULL) {
  41                 LOG("BUG: No screen found at this position (%d, %d)\n", event->root_x, event->root_y);
  42                 return 1;
  43         }
  44
  45         /* We cannot use the X root window's width_in_pixels or height_in_pixels
  46          * attributes here since they are not updated when you configure new
  47          * screens during runtime. Instead, we just use the most right and most
  48          * bottom Xinerama screen and use their position + width/height to get
  49          * the area of pixels currently in use */
  50         i3Screen *most_right = get_screen_most(D_RIGHT, screen),
  51                  *most_bottom = get_screen_most(D_DOWN, screen);
  52
  53         LOG("event->event_x = %d, event->root_x = %d\n", event->event_x, event->root_x);
  54
  55         LOG("Screen dimensions: (%d, %d) %d x %d\n", screen->rect.x, screen->rect.y, screen->rect.width, screen->rect.height);
  56
  57         /* FIXME: horizontal resizing causes empty spaces to exist */
  58         if (orientation == O_HORIZONTAL) {
  59                 LOG("Sorry, horizontal resizing is not yet activated due to creating layout bugs."
  60                     "If you are brave, enable the code for yourself and try fixing it.\n");
  61                 return 1;
  62         }
  63
  64         uint32_t mask = 0;
  65         uint32_t values[2];
  66
  67         mask = XCB_CW_OVERRIDE_REDIRECT;
  68         values[0] = 1;
  69
  70         /* Open a new window, the resizebar. Grab the pointer and move the window around
  71            as the user moves the pointer. */
  72         Rect grabrect = {0,
  73                          0,
  74                          most_right->rect.x + most_right->rect.width,
  75                          most_bottom->rect.x + most_bottom->rect.height};
  76         xcb_window_t grabwin = create_window(conn, grabrect, XCB_WINDOW_CLASS_INPUT_ONLY, -1, true, mask, values);
  77
  78         Rect helprect;
  79         if (orientation == O_VERTICAL) {
  80                 helprect.x = event->root_x;
  81                 helprect.y = screen->rect.y;
  82                 helprect.width = 2;
  83                 helprect.height = screen->rect.height;
  84                 new_position = event->root_x;
  85         } else {
  86                 helprect.x = screen->rect.x;
  87                 helprect.y = event->root_y;
  88                 helprect.width = screen->rect.width;
  89                 helprect.height = 2;
  90                 new_position = event->root_y;
  91         }
  92
  93         mask = XCB_CW_BACK_PIXEL;
  94         values[0] = config.client.focused.border;
  95
  96         mask |= XCB_CW_OVERRIDE_REDIRECT;
  97         values[1] = 1;
  98
  99         xcb_window_t helpwin = create_window(conn, helprect, XCB_WINDOW_CLASS_INPUT_OUTPUT,
 100                                              (orientation == O_VERTICAL ?
 101                                               XCB_CURSOR_SB_V_DOUBLE_ARROW :
 102                                               XCB_CURSOR_SB_H_DOUBLE_ARROW), true, mask, values);
 103
 104         xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin);
 105
 106         xcb_flush(conn);
 107
 108         void resize_callback(Rect *old_rect, uint32_t new_x, uint32_t new_y) {
 109                 LOG("new x = %d, y = %d\n", new_x, new_y);
 110                 if (orientation == O_VERTICAL) {
 111                         /* Check if the new coordinates are within screen boundaries */
 112                         if (new_x > (screen->rect.x + screen->rect.width - 25) ||
 113                             new_x < (screen->rect.x + 25))
 114                                 return;
 115
 116                         values[0] = new_position = new_x;
 117                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_X, values);
 118                 } else {
 119                         if (new_y > (screen->rect.y + screen->rect.height - 25) ||
 120                             new_y < (screen->rect.y + 25))
 121                                 return;
 122
 123                         values[0] = new_position = new_y;
 124                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_Y, values);
 125                 }
 126
 127                 xcb_flush(conn);
 128         }
 129
 130         drag_pointer(conn, NULL, event, grabwin, BORDER_TOP, resize_callback);
 131
 132         xcb_destroy_window(conn, helpwin);
 133         xcb_destroy_window(conn, grabwin);
 134         xcb_flush(conn);
 135
 136         if (orientation == O_VERTICAL) {
 137                 LOG("Resize was from X = %d to X = %d\n", event->root_x, new_position);
 138                 if (event->root_x == new_position) {
 139                         LOG("Nothing changed, not updating anything\n");
 140                         return 1;
 141                 }
 142
 143                 int default_width = ws->rect.width / ws->cols;
 144                 int old_unoccupied_x = get_unoccupied_x(ws);
 145
 146                 /* We pre-calculate the unoccupied space to see if we need to adapt sizes before
 147                  * doing the resize */
 148                 int new_unoccupied_x = old_unoccupied_x;
 149
 150                 if (old_unoccupied_x == 0)
 151                         old_unoccupied_x = ws->rect.width;
 152
 153                 if (ws->width_factor[first] == 0)
 154                         new_unoccupied_x += default_width;
 155
 156                 if (ws->width_factor[second] == 0)
 157                         new_unoccupied_x += default_width;
 158
 159                 LOG("\n\n\n");
 160                 LOG("old = %d, new = %d\n", old_unoccupied_x, new_unoccupied_x);
 161
 162                 /* If the space used for customly resized columns has changed we need to adapt the
 163                  * other customly resized columns, if any */
 164                 if (new_unoccupied_x != old_unoccupied_x)
 165                         for (int col = 0; col < ws->cols; col++) {
 166                                 if (ws->width_factor[col] == 0)
 167                                         continue;
 168
 169                                 LOG("Updating other column (%d) (current width_factor = %f)\n", col, ws->width_factor[col]);
 170                                 ws->width_factor[col] = (ws->width_factor[col] * old_unoccupied_x) / new_unoccupied_x;
 171                                 LOG("to %f\n", ws->width_factor[col]);
 172                         }
 173
 174                 LOG("old_unoccupied_x = %d\n", old_unoccupied_x);
 175
 176                 LOG("Updating first (before = %f)\n", ws->width_factor[first]);
 177                 /* Convert 0 (for default width_factor) to actual numbers */
 178                 if (ws->width_factor[first] == 0)
 179                         ws->width_factor[first] = ((float)ws->rect.width / ws->cols) / new_unoccupied_x;
 180
 181                 LOG("middle = %f\n", ws->width_factor[first]);
 182                 int old_width = ws->width_factor[first] * old_unoccupied_x;
 183                 LOG("first->width = %d, new_position = %d, event->root_x = %d\n", old_width, new_position, event->root_x);
 184                 ws->width_factor[first] *= (float)(old_width + (new_position - event->root_x)) / old_width;
 185                 LOG("-> %f\n", ws->width_factor[first]);
 186
 187
 188                 LOG("Updating second (before = %f)\n", ws->width_factor[second]);
 189                 if (ws->width_factor[second] == 0)
 190                         ws->width_factor[second] = ((float)ws->rect.width / ws->cols) / new_unoccupied_x;
 191                 LOG("middle = %f\n", ws->width_factor[second]);
 192                 old_width = ws->width_factor[second] * old_unoccupied_x;
 193                 LOG("second->width = %d, new_position = %d, event->root_x = %d\n", old_width, new_position, event->root_x);
 194                 ws->width_factor[second] *= (float)(old_width - (new_position - event->root_x)) / old_width;
 195                 LOG("-> %f\n", ws->width_factor[second]);
 196
 197                 LOG("new unoccupied_x = %d\n", get_unoccupied_x(ws));
 198
 199                 LOG("\n\n\n");
 200         } else {
 201 #if 0
 202                 LOG("Resize was from Y = %d to Y = %d\n", event->root_y, new_position);
 203                 if (event->root_y == new_position) {
 204                         LOG("Nothing changed, not updating anything\n");
 205                         return 1;
 206                 }
 207
 208                 /* Convert 0 (for default height_factor) to actual numbers */
 209                 if (first->height_factor == 0)
 210                         first->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 211                 if (second->height_factor == 0)
 212                         second->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 213
 214                 first->height_factor *= (float)(first->height + (new_position - event->root_y)) / first->height;
 215                 second->height_factor *= (float)(second->height - (new_position - event->root_y)) / second->height;
 216 #endif
 217         }
 218
 219         render_layout(conn);
 220
 221         return 1;
 222 }