swindow.c

   1 /*
   2  * swindow.c - simple window handling functions
   3  *
   4  * Copyright © 2008 Julien Danjou <julien@danjou.info>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  */
  21
  22 #include <math.h>
  23
  24 #include <xcb/xcb.h>
  25
  26 #include "structs.h"
  27 #include "swindow.h"
  28 #include "draw.h"
  29 #include "common/xutil.h"
  30
  31 static void
  32 simplewindow_draw_context_update(simple_window_t *sw, xcb_screen_t *s)
  33 {
  34     xcolor_t fg = sw->ctx.fg, bg = sw->ctx.bg;
  35     int phys_screen = sw->ctx.phys_screen;
  36
  37     draw_context_wipe(&sw->ctx);
  38
  39     /* update draw context */
  40     switch(sw->orientation)
  41     {
  42       case South:
  43       case North:
  44         /* we need a new pixmap this way [     ] to render */
  45         sw->ctx.pixmap = xcb_generate_id(globalconf.connection);
  46         xcb_create_pixmap(globalconf.connection,
  47                           s->root_depth,
  48                           sw->ctx.pixmap, s->root,
  49                           sw->geometries.internal.height, sw->geometries.internal.width);
  50         draw_context_init(&sw->ctx, phys_screen,
  51                           sw->geometries.internal.height, sw->geometries.internal.width,
  52                           sw->ctx.pixmap, &fg, &bg);
  53         break;
  54       case East:
  55         draw_context_init(&sw->ctx, phys_screen,
  56                           sw->geometries.internal.width, sw->geometries.internal.height,
  57                           sw->pixmap, &fg, &bg);
  58         break;
  59     }
  60 }
  61
  62 /** Initialize a simple window.
  63  * \param sw The simple window to initialize.
  64  * \param phys_screen Physical screen number.
  65  * \param geometry Window geometry.
  66  * \param border_width Window border width.
  67  * \param orientation The rendering orientation.
  68  * \param bg Default foreground color.
  69  * \param bg Default background color.
  70  */
  71 void
  72 simplewindow_init(simple_window_t *sw,
  73                   int phys_screen,
  74                   area_t geometry,
  75                   uint16_t border_width,
  76                   orientation_t orientation,
  77                   const xcolor_t *fg, const xcolor_t *bg)
  78 {
  79     xcb_screen_t *s = xutil_screen_get(globalconf.connection, phys_screen);
  80     uint32_t create_win_val[3];
  81     const uint32_t gc_mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND;
  82     const uint32_t gc_values[2] = { s->black_pixel, s->white_pixel };
  83
  84     sw->geometry.x = geometry.x;
  85     sw->geometry.y = geometry.y;
  86     sw->geometry.width = geometry.width;
  87     sw->geometry.height = geometry.height;
  88     sw->border.width = border_width;
  89
  90     /* The real protocol window. */
  91     sw->geometries.internal.x = geometry.x;
  92     sw->geometries.internal.y = geometry.y;
  93     sw->geometries.internal.width = geometry.width;
  94     sw->geometries.internal.height = geometry.height;
  95
  96     sw->orientation = orientation;
  97     sw->ctx.fg = *fg;
  98     sw->ctx.bg = *bg;
  99
 100     create_win_val[0] = XCB_BACK_PIXMAP_PARENT_RELATIVE;
 101     create_win_val[1] = 1;
 102     create_win_val[2] = XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT
 103         | XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY | XCB_EVENT_MASK_ENTER_WINDOW
 104         | XCB_EVENT_MASK_LEAVE_WINDOW | XCB_EVENT_MASK_STRUCTURE_NOTIFY
 105         | XCB_EVENT_MASK_BUTTON_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE
 106         | XCB_EVENT_MASK_POINTER_MOTION | XCB_EVENT_MASK_EXPOSURE;
 107
 108     sw->window = xcb_generate_id(globalconf.connection);
 109     xcb_create_window(globalconf.connection, s->root_depth, sw->window, s->root,
 110                       sw->geometries.internal.x, sw->geometries.internal.y, sw->geometries.internal.width, sw->geometries.internal.height,
 111                       border_width, XCB_COPY_FROM_PARENT, s->root_visual,
 112                       XCB_CW_BACK_PIXMAP | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK,
 113                       create_win_val);
 114
 115     sw->pixmap = xcb_generate_id(globalconf.connection);
 116     xcb_create_pixmap(globalconf.connection, s->root_depth, sw->pixmap, s->root,
 117                       sw->geometries.internal.width, sw->geometries.internal.height);
 118
 119     sw->ctx.phys_screen = phys_screen;
 120     simplewindow_draw_context_update(sw, s);
 121
 122     /* The default GC is just a newly created associated to the root window */
 123     sw->gc = xcb_generate_id(globalconf.connection);
 124     xcb_create_gc(globalconf.connection, sw->gc, s->root, gc_mask, gc_values);
 125 }
 126
 127 /** Destroy all resources of a simple window.
 128  * \param sw The simple_window_t to wipe.
 129  */
 130 void
 131 simplewindow_wipe(simple_window_t *sw)
 132 {
 133     if(sw->window)
 134     {
 135         xcb_destroy_window(globalconf.connection, sw->window);
 136         sw->window = XCB_NONE;
 137     }
 138     if(sw->pixmap)
 139     {
 140         xcb_free_pixmap(globalconf.connection, sw->pixmap);
 141         sw->pixmap = XCB_NONE;
 142     }
 143     if(sw->gc)
 144     {
 145         xcb_free_gc(globalconf.connection, sw->gc);
 146         sw->gc = XCB_NONE;
 147     }
 148     draw_context_wipe(&sw->ctx);
 149 }
 150
 151 /** Move a simple window.
 152  * \param sw The simple window to move.
 153  * \param x New x coordinate.
 154  * \param y New y coordinate.
 155  */
 156 void
 157 simplewindow_move(simple_window_t *sw, int x, int y)
 158 {
 159     const uint32_t move_win_vals[] = { x, y };
 160
 161     if(x != sw->geometries.internal.x || y != sw->geometries.internal.y)
 162     {
 163         sw->geometry.x = sw->geometries.internal.x = x;
 164         sw->geometry.y = sw->geometries.internal.y = y;
 165         xcb_configure_window(globalconf.connection, sw->window,
 166                              XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y,
 167                              move_win_vals);
 168     }
 169 }
 170
 171 /** Resize a simple window.
 172  * \param sw The simple_window_t to resize.
 173  * \param w New width.
 174  * \param h New height.
 175  */
 176 void
 177 simplewindow_resize(simple_window_t *sw, int w, int h)
 178 {
 179     int iw = w - 2 * sw->border.width;
 180     int ih = h - 2 * sw->border.width;
 181
 182     if(iw > 0 && ih > 0 &&
 183         (sw->geometries.internal.width != iw || sw->geometries.internal.height != ih))
 184     {
 185         xcb_screen_t *s = xutil_screen_get(globalconf.connection, sw->ctx.phys_screen);
 186         uint32_t resize_win_vals[2];
 187
 188         sw->geometries.internal.width = resize_win_vals[0] = iw;
 189         sw->geometries.internal.height = resize_win_vals[1] = ih;
 190         sw->geometry.width = w;
 191         sw->geometry.height = h;
 192         xcb_free_pixmap(globalconf.connection, sw->pixmap);
 193         /* orientation != East */
 194         if(sw->pixmap != sw->ctx.pixmap)
 195             xcb_free_pixmap(globalconf.connection, sw->ctx.pixmap);
 196         sw->pixmap = xcb_generate_id(globalconf.connection);
 197         xcb_create_pixmap(globalconf.connection, s->root_depth, sw->pixmap, s->root, iw, ih);
 198         xcb_configure_window(globalconf.connection, sw->window,
 199                              XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT,
 200                              resize_win_vals);
 201         simplewindow_draw_context_update(sw, s);
 202     }
 203 }
 204
 205 /** Move and resize a window in one call.
 206  * \param sw The simple window to move and resize.
 207  * \param geom The new geometry.
 208  */
 209 void
 210 simplewindow_moveresize(simple_window_t *sw, area_t geom)
 211 {
 212     uint32_t moveresize_win_vals[4], mask_vals = 0;
 213     xcb_screen_t *s = xutil_screen_get(globalconf.connection, sw->ctx.phys_screen);
 214
 215     area_t geom_internal = geom;
 216     geom_internal.width -= 2 * sw->border.width;
 217     geom_internal.height -= 2* sw->border.width;
 218
 219     if(sw->geometries.internal.x != geom_internal.x || sw->geometries.internal.y != geom_internal.y)
 220     {
 221         sw->geometries.internal.x = moveresize_win_vals[0] = geom_internal.x;
 222         sw->geometries.internal.y = moveresize_win_vals[1] = geom_internal.y;
 223         mask_vals |= XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y;
 224     }
 225
 226     if(sw->geometry.width != geom.width || sw->geometry.height != geom.height)
 227     {
 228         if(mask_vals)
 229         {
 230             sw->geometries.internal.width = moveresize_win_vals[2] = geom_internal.width;
 231             sw->geometries.internal.height = moveresize_win_vals[3] = geom_internal.height;
 232         }
 233         else
 234         {
 235             sw->geometries.internal.width = moveresize_win_vals[0] = geom_internal.width;
 236             sw->geometries.internal.height = moveresize_win_vals[1] = geom_internal.height;
 237         }
 238         mask_vals |= XCB_CONFIG_WINDOW_WIDTH | XCB_CONFIG_WINDOW_HEIGHT;
 239         xcb_free_pixmap(globalconf.connection, sw->pixmap);
 240         /* orientation != East */
 241         if(sw->pixmap != sw->ctx.pixmap)
 242             xcb_free_pixmap(globalconf.connection, sw->ctx.pixmap);
 243         sw->pixmap = xcb_generate_id(globalconf.connection);
 244         xcb_create_pixmap(globalconf.connection, s->root_depth, sw->pixmap, s->root, geom_internal.width, geom_internal.height);
 245         simplewindow_draw_context_update(sw, s);
 246     }
 247
 248     /* Also save geometry including border. */
 249     sw->geometry = geom;
 250
 251     xcb_configure_window(globalconf.connection, sw->window, mask_vals, moveresize_win_vals);
 252 }
 253
 254 /** Refresh the window content by copying its pixmap data to its window.
 255  * \param sw The simple window to refresh.
 256  */
 257 void
 258 simplewindow_refresh_pixmap_partial(simple_window_t *sw,
 259                                     int16_t x, int16_t y,
 260                                     uint16_t w, uint16_t h)
 261 {
 262     xcb_copy_area(globalconf.connection, sw->pixmap,
 263                   sw->window, sw->gc, x, y, x, y,
 264                   w, h);
 265 }
 266
 267 /** Set a simple window border width.
 268  * \param sw The simple window to change border width.
 269  * \param border_width The border width in pixel.
 270  */
 271 void
 272 simplewindow_border_width_set(simple_window_t *sw, uint32_t border_width)
 273 {
 274     xcb_configure_window(globalconf.connection, sw->window, XCB_CONFIG_WINDOW_BORDER_WIDTH,
 275                          &border_width);
 276     sw->border.width = border_width;
 277 }
 278
 279 /** Set a simple window border color.
 280  * \param sw The simple window to change border width.
 281  * \param color The border color.
 282  */
 283 void
 284 simplewindow_border_color_set(simple_window_t *sw, const xcolor_t *color)
 285 {
 286     xcb_change_window_attributes(globalconf.connection, sw->window,
 287                                  XCB_CW_BORDER_PIXEL, &color->pixel);
 288     sw->border.color = *color;
 289 }
 290
 291 /** Set simple window orientation.
 292  * \param sw The simple window.
 293  * \param o The new orientation
 294  */
 295 void
 296 simplewindow_orientation_set(simple_window_t *sw, orientation_t o)
 297 {
 298     if(o != sw->orientation)
 299     {
 300         xcb_screen_t *s = xutil_screen_get(globalconf.connection, sw->ctx.phys_screen);
 301         sw->orientation = o;
 302         /* orientation != East */
 303         if(sw->pixmap != sw->ctx.pixmap)
 304             xcb_free_pixmap(globalconf.connection, sw->ctx.pixmap);
 305         simplewindow_draw_context_update(sw, s);
 306     }
 307 }
 308
 309 /** Set simple window cursor.
 310  * \param sw The simple window.
 311  * \param c The cursor.
 312  */
 313 void
 314 simplewindow_cursor_set(simple_window_t *sw, xcb_cursor_t c)
 315 {
 316     if(sw->window)
 317     {
 318         const uint32_t change_win_vals[] = { c };
 319         xcb_change_window_attributes(globalconf.connection, sw->window, XCB_CW_CURSOR, change_win_vals);
 320     }
 321 }
 322
 323 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80