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("Screen dimensions: (%d, %d) %d x %d\n", screen->rect.x, screen->rect.y, screen->rect.width, screen->rect.height);
  47
  48         /* FIXME: horizontal resizing causes empty spaces to exist */
  49         if (orientation == O_HORIZONTAL) {
  50                 LOG("Sorry, horizontal resizing is not yet activated due to creating layout bugs."
  51                     "If you are brave, enable the code for yourself and try fixing it.\n");
  52                 return 1;
  53         }
  54
  55         uint32_t mask = 0;
  56         uint32_t values[2];
  57
  58         mask = XCB_CW_OVERRIDE_REDIRECT;
  59         values[0] = 1;
  60
  61         /* Open a new window, the resizebar. Grab the pointer and move the window around
  62            as the user moves the pointer. */
  63         Rect grabrect = {0, 0, root_screen->width_in_pixels, root_screen->height_in_pixels};
  64         xcb_window_t grabwin = create_window(conn, grabrect, XCB_WINDOW_CLASS_INPUT_ONLY, -1, mask, values);
  65
  66         Rect helprect;
  67         if (orientation == O_VERTICAL) {
  68                 helprect.x = event->root_x;
  69                 helprect.y = screen->rect.y;
  70                 helprect.width = 2;
  71                 helprect.height = screen->rect.height;
  72                 new_position = event->root_x;
  73         } else {
  74                 helprect.x = 0;
  75                 helprect.y = event->root_y;
  76                 helprect.width = root_screen->width_in_pixels;
  77                 helprect.height = 2;
  78                 new_position = event->root_y;
  79         }
  80
  81         mask = XCB_CW_BACK_PIXEL;
  82         values[0] = config.client.focused.border;
  83
  84         mask |= XCB_CW_OVERRIDE_REDIRECT;
  85         values[1] = 1;
  86
  87         xcb_window_t helpwin = create_window(conn, helprect, XCB_WINDOW_CLASS_INPUT_OUTPUT,
  88                                              (orientation == O_VERTICAL ?
  89                                               XCB_CURSOR_SB_V_DOUBLE_ARROW :
  90                                               XCB_CURSOR_SB_H_DOUBLE_ARROW), mask, values);
  91
  92         xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin);
  93
  94         xcb_flush(conn);
  95
  96         void resize_callback(Rect *old_rect, uint32_t new_x, uint32_t new_y) {
  97                 LOG("new x = %d, y = %d\n", new_x, new_y);
  98                 if (orientation == O_VERTICAL) {
  99                         /* Check if the new coordinates are within screen boundaries */
 100                         if (new_x > (screen->rect.x + screen->rect.width - 25) ||
 101                             new_x < (screen->rect.x + 25))
 102                                 return;
 103
 104                         values[0] = new_position = new_x;
 105                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_X, values);
 106                 } else {
 107                         if (new_y > (screen->rect.y + screen->rect.height - 25) ||
 108                             new_y < (screen->rect.y + 25))
 109                                 return;
 110
 111                         values[0] = new_position = new_y;
 112                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_Y, values);
 113                 }
 114
 115                 xcb_flush(conn);
 116         }
 117
 118         drag_pointer(conn, NULL, event, grabwin, BORDER_TOP, resize_callback);
 119
 120         xcb_destroy_window(conn, helpwin);
 121         xcb_destroy_window(conn, grabwin);
 122         xcb_flush(conn);
 123
 124         if (orientation == O_VERTICAL) {
 125                 LOG("Resize was from X = %d to X = %d\n", event->root_x, new_position);
 126                 if (event->root_x == new_position) {
 127                         LOG("Nothing changed, not updating anything\n");
 128                         return 1;
 129                 }
 130
 131                 int default_width = ws->rect.width / ws->cols;
 132                 int old_unoccupied_x = get_unoccupied_x(ws);
 133
 134                 /* We pre-calculate the unoccupied space to see if we need to adapt sizes before
 135                  * doing the resize */
 136                 int new_unoccupied_x = old_unoccupied_x;
 137
 138                 if (old_unoccupied_x == 0)
 139                         old_unoccupied_x = ws->rect.width;
 140
 141                 if (ws->width_factor[first] == 0)
 142                         new_unoccupied_x += default_width;
 143
 144                 if (ws->width_factor[second] == 0)
 145                         new_unoccupied_x += default_width;
 146
 147                 LOG("\n\n\n");
 148                 LOG("old = %d, new = %d\n", old_unoccupied_x, new_unoccupied_x);
 149
 150                 /* If the space used for customly resized columns has changed we need to adapt the
 151                  * other customly resized columns, if any */
 152                 if (new_unoccupied_x != old_unoccupied_x)
 153                         for (int col = 0; col < ws->cols; col++) {
 154                                 if (ws->width_factor[col] == 0)
 155                                         continue;
 156
 157                                 LOG("Updating other column (%d) (current width_factor = %f)\n", col, ws->width_factor[col]);
 158                                 ws->width_factor[col] = (ws->width_factor[col] * old_unoccupied_x) / new_unoccupied_x;
 159                                 LOG("to %f\n", ws->width_factor[col]);
 160                         }
 161
 162                 LOG("old_unoccupied_x = %d\n", old_unoccupied_x);
 163
 164                 LOG("Updating first (before = %f)\n", ws->width_factor[first]);
 165                 /* Convert 0 (for default width_factor) to actual numbers */
 166                 if (ws->width_factor[first] == 0)
 167                         ws->width_factor[first] = ((float)ws->rect.width / ws->cols) / new_unoccupied_x;
 168
 169                 LOG("middle = %f\n", ws->width_factor[first]);
 170                 int old_width = ws->width_factor[first] * old_unoccupied_x;
 171                 LOG("first->width = %d, new_position = %d, event->root_x = %d\n", old_width, new_position, event->root_x);
 172                 ws->width_factor[first] *= (float)(old_width + (new_position - event->root_x)) / old_width;
 173                 LOG("-> %f\n", ws->width_factor[first]);
 174
 175
 176                 LOG("Updating second (before = %f)\n", ws->width_factor[second]);
 177                 if (ws->width_factor[second] == 0)
 178                         ws->width_factor[second] = ((float)ws->rect.width / ws->cols) / new_unoccupied_x;
 179                 LOG("middle = %f\n", ws->width_factor[second]);
 180                 old_width = ws->width_factor[second] * old_unoccupied_x;
 181                 LOG("second->width = %d, new_position = %d, event->root_x = %d\n", old_width, new_position, event->root_x);
 182                 ws->width_factor[second] *= (float)(old_width - (new_position - event->root_x)) / old_width;
 183                 LOG("-> %f\n", ws->width_factor[second]);
 184
 185                 LOG("new unoccupied_x = %d\n", get_unoccupied_x(ws));
 186
 187                 LOG("\n\n\n");
 188         } else {
 189 #if 0
 190                 LOG("Resize was from Y = %d to Y = %d\n", event->root_y, new_position);
 191                 if (event->root_y == new_position) {
 192                         LOG("Nothing changed, not updating anything\n");
 193                         return 1;
 194                 }
 195
 196                 /* Convert 0 (for default height_factor) to actual numbers */
 197                 if (first->height_factor == 0)
 198                         first->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 199                 if (second->height_factor == 0)
 200                         second->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 201
 202                 first->height_factor *= (float)(first->height + (new_position - event->root_y)) / first->height;
 203                 second->height_factor *= (float)(second->height - (new_position - event->root_y)) / second->height;
 204 #endif
 205         }
 206
 207         render_layout(conn);
 208
 209         return 1;
 210 }