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
  28 /*
  29  * Renders the resize window between the first/second container and resizes
  30  * the table column/row.
  31  *
  32  */
  33 int resize_graphical_handler(xcb_connection_t *conn, Container *first, Container *second,
  34                              resize_orientation_t orientation, xcb_button_press_event_t *event) {
  35         int new_position;
  36         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
  37         xcb_screen_t *root_screen = xcb_setup_roots_iterator(xcb_get_setup(conn)).data;
  38
  39         /* FIXME: horizontal resizing causes empty spaces to exist */
  40         if (orientation == O_HORIZONTAL) {
  41                 LOG("Sorry, horizontal resizing is not yet activated due to creating layout bugs."
  42                     "If you are brave, enable the code for yourself and try fixing it.\n");
  43                 return 1;
  44         }
  45
  46         uint32_t mask = 0;
  47         uint32_t values[2];
  48
  49         mask = XCB_CW_OVERRIDE_REDIRECT;
  50         values[0] = 1;
  51
  52         /* Open a new window, the resizebar. Grab the pointer and move the window around
  53            as the user moves the pointer. */
  54         Rect grabrect = {0, 0, root_screen->width_in_pixels, root_screen->height_in_pixels};
  55         xcb_window_t grabwin = create_window(conn, grabrect, XCB_WINDOW_CLASS_INPUT_ONLY, -1, mask, values);
  56
  57         Rect helprect;
  58         if (orientation == O_VERTICAL) {
  59                 helprect.x = event->root_x;
  60                 helprect.y = 0;
  61                 helprect.width = 2;
  62                 helprect.height = root_screen->height_in_pixels;
  63                 new_position = event->root_x;
  64         } else {
  65                 helprect.x = 0;
  66                 helprect.y = event->root_y;
  67                 helprect.width = root_screen->width_in_pixels;
  68                 helprect.height = 2;
  69                 new_position = event->root_y;
  70         }
  71
  72         mask = XCB_CW_BACK_PIXEL;
  73         values[0] = get_colorpixel(conn, "#4c7899");
  74
  75         mask |= XCB_CW_OVERRIDE_REDIRECT;
  76         values[1] = 1;
  77
  78         xcb_window_t helpwin = create_window(conn, helprect, XCB_WINDOW_CLASS_INPUT_OUTPUT,
  79                                              (orientation == O_VERTICAL ?
  80                                               XCB_CURSOR_SB_V_DOUBLE_ARROW :
  81                                               XCB_CURSOR_SB_H_DOUBLE_ARROW), mask, values);
  82
  83         xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin);
  84
  85         xcb_grab_pointer(conn, false, root, XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION,
  86                         XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC, grabwin, XCB_NONE, XCB_CURRENT_TIME);
  87
  88         xcb_flush(conn);
  89
  90         xcb_generic_event_t *inside_event;
  91         /* I’ve always wanted to have my own eventhandler… */
  92         while ((inside_event = xcb_wait_for_event(conn))) {
  93                 /* Same as get_event_handler in xcb */
  94                 int nr = inside_event->response_type;
  95                 if (nr == 0) {
  96                         /* An error occured */
  97                         handle_event(NULL, conn, inside_event);
  98                         free(inside_event);
  99                         continue;
 100                 }
 101                 assert(nr < 256);
 102                 nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 103                 assert(nr >= 2);
 104
 105                 /* Check if we need to escape this loop */
 106                 if (nr == XCB_BUTTON_RELEASE)
 107                         break;
 108
 109                 switch (nr) {
 110                         case XCB_MOTION_NOTIFY:
 111                                 if (orientation == O_VERTICAL) {
 112                                         values[0] = new_position = ((xcb_motion_notify_event_t*)inside_event)->root_x;
 113                                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_X, values);
 114                                 } else {
 115                                         values[0] = new_position = ((xcb_motion_notify_event_t*)inside_event)->root_y;
 116                                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_Y, values);
 117                                 }
 118
 119                                 xcb_flush(conn);
 120                                 break;
 121                         default:
 122                                 LOG("Passing to original handler\n");
 123                                 /* Use original handler */
 124                                 xcb_event_handle(&evenths, inside_event);
 125                                 break;
 126                 }
 127                 free(inside_event);
 128         }
 129
 130         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 131         xcb_destroy_window(conn, helpwin);
 132         xcb_destroy_window(conn, grabwin);
 133         xcb_flush(conn);
 134
 135         Workspace *ws = first->workspace;
 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->col] == 0)
 154                         new_unoccupied_x += default_width;
 155
 156                 if (ws->width_factor[second->col] == 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->col]);
 177                 /* Convert 0 (for default width_factor) to actual numbers */
 178                 if (ws->width_factor[first->col] == 0)
 179                         ws->width_factor[first->col] = ((float)ws->rect.width / ws->cols) / new_unoccupied_x;
 180
 181                 LOG("middle = %f\n", ws->width_factor[first->col]);
 182                 LOG("first->width = %d, new_position = %d, event->root_x = %d\n", first->width, new_position, event->root_x);
 183                 ws->width_factor[first->col] *= (float)(first->width + (new_position - event->root_x)) / first->width;
 184                 LOG("-> %f\n", ws->width_factor[first->col]);
 185
 186
 187                 LOG("Updating second (before = %f)\n", ws->width_factor[second->col]);
 188                 if (ws->width_factor[second->col] == 0)
 189                         ws->width_factor[second->col] = ((float)ws->rect.width / ws->cols) / new_unoccupied_x;
 190                 LOG("middle = %f\n", ws->width_factor[second->col]);
 191                 LOG("second->width = %d, new_position = %d, event->root_x = %d\n", second->width, new_position, event->root_x);
 192                 ws->width_factor[second->col] *= (float)(second->width - (new_position - event->root_x)) / second->width;
 193                 LOG("-> %f\n", ws->width_factor[second->col]);
 194
 195                 LOG("new unoccupied_x = %d\n", get_unoccupied_x(ws));
 196
 197                 LOG("\n\n\n");
 198         } else {
 199 #if 0
 200                 LOG("Resize was from Y = %d to Y = %d\n", event->root_y, new_position);
 201                 if (event->root_y == new_position) {
 202                         LOG("Nothing changed, not updating anything\n");
 203                         return 1;
 204                 }
 205
 206                 /* Convert 0 (for default height_factor) to actual numbers */
 207                 if (first->height_factor == 0)
 208                         first->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 209                 if (second->height_factor == 0)
 210                         second->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 211
 212                 first->height_factor *= (float)(first->height + (new_position - event->root_y)) / first->height;
 213                 second->height_factor *= (float)(second->height - (new_position - event->root_y)) / second->height;
 214 #endif
 215         }
 216
 217         render_layout(conn);
 218
 219         return 1;
 220 }