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
  30 /*
  31  * Renders the resize window between the first/second container and resizes
  32  * the table column/row.
  33  *
  34  */
  35 int resize_graphical_handler(xcb_connection_t *conn, Workspace *ws, int first, int second,
  36                              resize_orientation_t orientation, xcb_button_press_event_t *event) {
  37         int new_position;
  38         xcb_window_t root = xcb_setup_roots_iterator(xcb_get_setup(conn)).data->root;
  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_grab_pointer(conn, false, root, XCB_EVENT_MASK_BUTTON_RELEASE | XCB_EVENT_MASK_POINTER_MOTION,
  95                         XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC, grabwin, XCB_NONE, XCB_CURRENT_TIME);
  96
  97         xcb_flush(conn);
  98
  99         xcb_generic_event_t *inside_event;
 100         /* I’ve always wanted to have my own eventhandler… */
 101         while ((inside_event = xcb_wait_for_event(conn))) {
 102                 /* Same as get_event_handler in xcb */
 103                 int nr = inside_event->response_type;
 104                 if (nr == 0) {
 105                         /* An error occured */
 106                         handle_event(NULL, conn, inside_event);
 107                         free(inside_event);
 108                         continue;
 109                 }
 110                 assert(nr < 256);
 111                 nr &= XCB_EVENT_RESPONSE_TYPE_MASK;
 112                 assert(nr >= 2);
 113
 114                 /* Check if we need to escape this loop */
 115                 if (nr == XCB_BUTTON_RELEASE)
 116                         break;
 117
 118                 switch (nr) {
 119                         case XCB_MOTION_NOTIFY: {
 120                                 xcb_motion_notify_event_t *motion_event = (xcb_motion_notify_event_t*)inside_event;
 121                                 if (orientation == O_VERTICAL) {
 122                                         if (motion_event->root_x < (screen->rect.x + screen->rect.width) &&
 123                                             motion_event->root_x > screen->rect.x) {
 124                                                 values[0] = new_position = ((xcb_motion_notify_event_t*)inside_event)->root_x;
 125                                                 xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_X, values);
 126                                         } else {
 127                                                 LOG("Ignoring new position\n");
 128                                         }
 129                                 } else {
 130                                         values[0] = new_position = ((xcb_motion_notify_event_t*)inside_event)->root_y;
 131                                         xcb_configure_window(conn, helpwin, XCB_CONFIG_WINDOW_Y, values);
 132                                 }
 133
 134                                 xcb_flush(conn);
 135                                 break;
 136                         }
 137                         default:
 138                                 LOG("Passing to original handler\n");
 139                                 /* Use original handler */
 140                                 xcb_event_handle(&evenths, inside_event);
 141                                 break;
 142                 }
 143                 free(inside_event);
 144         }
 145
 146         xcb_ungrab_pointer(conn, XCB_CURRENT_TIME);
 147         xcb_destroy_window(conn, helpwin);
 148         xcb_destroy_window(conn, grabwin);
 149         xcb_flush(conn);
 150
 151         if (orientation == O_VERTICAL) {
 152                 LOG("Resize was from X = %d to X = %d\n", event->root_x, new_position);
 153                 if (event->root_x == new_position) {
 154                         LOG("Nothing changed, not updating anything\n");
 155                         return 1;
 156                 }
 157
 158                 int default_width = ws->rect.width / ws->cols;
 159                 int old_unoccupied_x = get_unoccupied_x(ws);
 160
 161                 /* We pre-calculate the unoccupied space to see if we need to adapt sizes before
 162                  * doing the resize */
 163                 int new_unoccupied_x = old_unoccupied_x;
 164
 165                 if (old_unoccupied_x == 0)
 166                         old_unoccupied_x = ws->rect.width;
 167
 168                 if (ws->width_factor[first] == 0)
 169                         new_unoccupied_x += default_width;
 170
 171                 if (ws->width_factor[second] == 0)
 172                         new_unoccupied_x += default_width;
 173
 174                 LOG("\n\n\n");
 175                 LOG("old = %d, new = %d\n", old_unoccupied_x, new_unoccupied_x);
 176
 177                 /* If the space used for customly resized columns has changed we need to adapt the
 178                  * other customly resized columns, if any */
 179                 if (new_unoccupied_x != old_unoccupied_x)
 180                         for (int col = 0; col < ws->cols; col++) {
 181                                 if (ws->width_factor[col] == 0)
 182                                         continue;
 183
 184                                 LOG("Updating other column (%d) (current width_factor = %f)\n", col, ws->width_factor[col]);
 185                                 ws->width_factor[col] = (ws->width_factor[col] * old_unoccupied_x) / new_unoccupied_x;
 186                                 LOG("to %f\n", ws->width_factor[col]);
 187                         }
 188
 189                 LOG("old_unoccupied_x = %d\n", old_unoccupied_x);
 190
 191                 LOG("Updating first (before = %f)\n", ws->width_factor[first]);
 192                 /* Convert 0 (for default width_factor) to actual numbers */
 193                 if (ws->width_factor[first] == 0)
 194                         ws->width_factor[first] = ((float)ws->rect.width / ws->cols) / new_unoccupied_x;
 195
 196                 LOG("middle = %f\n", ws->width_factor[first]);
 197                 int old_width = ws->width_factor[first] * old_unoccupied_x;
 198                 LOG("first->width = %d, new_position = %d, event->root_x = %d\n", old_width, new_position, event->root_x);
 199                 ws->width_factor[first] *= (float)(old_width + (new_position - event->root_x)) / old_width;
 200                 LOG("-> %f\n", ws->width_factor[first]);
 201
 202
 203                 LOG("Updating second (before = %f)\n", ws->width_factor[second]);
 204                 if (ws->width_factor[second] == 0)
 205                         ws->width_factor[second] = ((float)ws->rect.width / ws->cols) / new_unoccupied_x;
 206                 LOG("middle = %f\n", ws->width_factor[second]);
 207                 old_width = ws->width_factor[second] * old_unoccupied_x;
 208                 LOG("second->width = %d, new_position = %d, event->root_x = %d\n", old_width, new_position, event->root_x);
 209                 ws->width_factor[second] *= (float)(old_width - (new_position - event->root_x)) / old_width;
 210                 LOG("-> %f\n", ws->width_factor[second]);
 211
 212                 LOG("new unoccupied_x = %d\n", get_unoccupied_x(ws));
 213
 214                 LOG("\n\n\n");
 215         } else {
 216 #if 0
 217                 LOG("Resize was from Y = %d to Y = %d\n", event->root_y, new_position);
 218                 if (event->root_y == new_position) {
 219                         LOG("Nothing changed, not updating anything\n");
 220                         return 1;
 221                 }
 222
 223                 /* Convert 0 (for default height_factor) to actual numbers */
 224                 if (first->height_factor == 0)
 225                         first->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 226                 if (second->height_factor == 0)
 227                         second->height_factor = ((float)ws->rect.height / ws->rows) / ws->rect.height;
 228
 229                 first->height_factor *= (float)(first->height + (new_position - event->root_y)) / first->height;
 230                 second->height_factor *= (float)(second->height - (new_position - event->root_y)) / second->height;
 231 #endif
 232         }
 233
 234         render_layout(conn);
 235
 236         return 1;
 237 }