git.mutantstargoat.com Git - winnie/blob - src/wm.cc

   1 /*
   2 winnie - an experimental window system
   3
   4 Copyright (C) 2013 Eleni Maria Stea
   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 3 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
  17 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 Author: Eleni Maria Stea <elene.mst@gmail.com>
  20 */
  21
  22 #include <algorithm>
  23 #include <limits.h>
  24 #include <stdexcept>
  25 #include <stdio.h>      // TODO
  26
  27 #include "gfx.h"
  28 #include "mouse.h"
  29 #include "mouse_cursor.h"
  30 #include "text.h"
  31 #include "wm.h"
  32 #include "window.h"
  33 #include "winnie.h"
  34
  35 #define DCLICK_INTERVAL 400
  36
  37 WindowManager *wm;
  38
  39 static void display(Window *win);
  40 static void mouse(Window *win, int bn, bool pressed, int x, int y);
  41 static void motion(Window *win, int x, int y);
  42
  43 bool init_window_manager()
  44 {
  45         if(!(wm = new WindowManager)) {
  46                 return false;
  47         }
  48
  49         return true;
  50 }
  51
  52 void destroy_window_manager()
  53 {
  54         delete wm;
  55 }
  56
  57 void WindowManager::create_frame(Window *win)
  58 {
  59         Window *frame = new Window;
  60         Window *parent = win->get_parent();
  61
  62         frame->set_display_callback(display);
  63         frame->set_mouse_button_callback(mouse);
  64         frame->set_mouse_motion_callback(motion);
  65         frame->set_focusable(false);
  66         frame->add_child(win);
  67
  68         windows.push_back(frame);
  69
  70         Rect win_rect = win->get_rect();
  71         frame->move(win_rect.x - frame_thickness,
  72                         win_rect.y - frame_thickness - titlebar_thickness);
  73         frame->resize(win_rect.width + frame_thickness * 2,
  74                         win_rect.height + frame_thickness * 2 + titlebar_thickness);
  75
  76         win->move(frame_thickness, frame_thickness + titlebar_thickness);
  77         parent->add_child(frame);
  78 }
  79
  80 void WindowManager::destroy_frame(Window *win)
  81 {
  82         Window *frame = win->parent;
  83         if(!frame) {
  84                 return;
  85         }
  86
  87         if(grab_win == win) {
  88                 release_mouse();
  89         }
  90
  91         std::list<Window*>::iterator it;
  92         it = std::find(windows.begin(), windows.end(), frame);
  93         if(it != windows.end()) {
  94                 root_win->add_child(win);
  95                 windows.erase(it);
  96                 delete frame;
  97         }
  98 }
  99
 100 WindowManager::WindowManager()
 101 {
 102         if(!wm) {
 103                 wm = this;
 104         } else {
 105                 throw std::runtime_error("Trying to create a second instance of WindowManager!\n");
 106         }
 107
 108         root_win = new Window;
 109         root_win->resize(get_screen_size().width, get_screen_size().height);
 110         root_win->move(0, 0);
 111         root_win->set_managed(false);
 112
 113         grab_win = 0;
 114         focused_win = 0;
 115         background = 0;
 116
 117         bg_color[0] = 210;
 118         bg_color[1] = 106;
 119         bg_color[2] = 106;
 120
 121         frame_thickness = 8;
 122         titlebar_thickness = 16;
 123
 124         set_focused_frame_color(0, 0, 0);
 125         set_unfocused_frame_color(200, 200, 200);
 126
 127         mouse_cursor.set_image(mouse_cursor_width, mouse_cursor_height);
 128         unsigned char *pixels = mouse_cursor.get_image();
 129
 130         for(int i=0; i<mouse_cursor_height; i++) {
 131                 for(int j=0; j<mouse_cursor_width; j++) {
 132                         int val = mouse_cursor_bw[i * mouse_cursor_width + j];
 133                         *pixels++ = val;
 134                         *pixels++ = val;
 135                         *pixels++ = val;
 136                         *pixels++ = 255;
 137                 }
 138         }
 139 }
 140
 141 WindowManager::~WindowManager()
 142 {
 143         delete root_win;
 144 }
 145
 146 void WindowManager::invalidate_region(const Rect &rect)
 147 {
 148         dirty_rects.push_back(rect);
 149 }
 150
 151 void WindowManager::process_windows()
 152 {
 153         if(dirty_rects.empty()) {
 154                 return;
 155         }
 156
 157         std::list<Rect>::iterator drit = dirty_rects.begin();
 158         Rect uni = *drit++;
 159         while(drit != dirty_rects.end()) {
 160                 uni = rect_union(uni, *drit++);
 161         }
 162         dirty_rects.clear();
 163
 164         wait_vsync();
 165
 166         if(!background) {
 167                 fill_rect(uni, bg_color[0], bg_color[1], bg_color[2]);
 168         }
 169         else {
 170                 blit(background->pixels, Rect(0, 0, background->width, background->height),
 171                                 get_framebuffer(), get_screen_size(), 0, 0);
 172         }
 173
 174         root_win->draw_children(uni);
 175
 176         // draw mouse cursor
 177         int mouse_x, mouse_y;
 178         get_pointer_pos(&mouse_x, &mouse_y);
 179
 180         blit_key(mouse_cursor.get_image(), mouse_cursor.get_rect(),
 181                         get_framebuffer(), get_screen_size(), mouse_x, mouse_y,
 182                         0, 0, 0);
 183
 184         Rect mouse_rect(mouse_x, mouse_y, mouse_cursor.get_width(), mouse_cursor.get_height());
 185         invalidate_region(mouse_rect);
 186
 187         gfx_update(uni);
 188 }
 189
 190 void WindowManager::add_window(Window *win)
 191 {
 192         if(!win || win == root_win) {
 193                 return;
 194         }
 195
 196         root_win->add_child(win);
 197
 198         if(windows.empty()) {
 199                 focused_win = win;
 200         }
 201
 202         if(win->get_managed()) {
 203                 create_frame(win);
 204         }
 205
 206         windows.push_back(win);
 207 }
 208
 209 void WindowManager::remove_window(Window *win)
 210 {
 211         std::list<Window*>::iterator it;
 212         it = std::find(windows.begin(), windows.end(), win);
 213
 214         if(it != windows.end()) {
 215                 windows.erase(it);
 216         }
 217 }
 218
 219 void WindowManager::set_focused_window(Window *win)
 220 {
 221         if(win && win == focused_win) {
 222                 return;
 223         }
 224
 225         Window *parent;
 226         if(focused_win) {
 227                 // invalidate the frame (if any)
 228                 parent = focused_win->get_parent();
 229                 if(parent && parent != root_win) {
 230                         parent->invalidate();
 231                         fill_rect(parent->get_absolute_rect(), frame_ucolor[0], frame_ucolor[1], frame_ucolor[2]);
 232                 }
 233         }
 234
 235         if(!win) {
 236                 focused_win = 0;
 237                 return;
 238         }
 239
 240         if(win->get_focusable()) {
 241                 focused_win = win;
 242                 parent = focused_win->get_parent();
 243                 fill_rect(parent->get_absolute_rect(), frame_fcolor[0], frame_fcolor[1], frame_fcolor[2]);
 244                 return;
 245         }
 246
 247         Window **children = win->get_children();
 248         for(int i=0; i<win->get_children_count(); i++) {
 249                 if(children[0]->get_focusable()) {
 250                         set_focused_window(children[0]);
 251                         fill_rect(win->get_absolute_rect(), frame_fcolor[0], frame_fcolor[1], frame_fcolor[2]);
 252                         return;
 253                 }
 254         }
 255
 256         focused_win = 0;
 257 }
 258
 259 const Window *WindowManager::get_focused_window() const
 260 {
 261         return focused_win;
 262 }
 263
 264 Window *WindowManager::get_focused_window()
 265 {
 266         return focused_win;
 267 }
 268
 269 Window *WindowManager::get_window_at_pos(int pointer_x, int pointer_y)
 270 {
 271         Window *root_win = wm->get_root_window();
 272         Window **children = root_win->get_children();
 273         for(int i=root_win->get_children_count() - 1; i>=0; i--) {
 274                 if(children[i]->contains_point(pointer_x, pointer_y)) {
 275                         return children[i];
 276                 }
 277         }
 278
 279         return 0;
 280 }
 281
 282 Window *WindowManager::get_root_window() const
 283 {
 284         return root_win;
 285 }
 286
 287 void WindowManager::set_focused_frame_color(int r, int g, int b)
 288 {
 289         frame_fcolor[0] = r;
 290         frame_fcolor[1] = g;
 291         frame_fcolor[2] = b;
 292 }
 293
 294 void WindowManager::get_focused_frame_color(int *r, int *g, int *b) const
 295 {
 296         *r = frame_fcolor[0];
 297         *g = frame_fcolor[1];
 298         *b = frame_fcolor[2];
 299 }
 300
 301 void WindowManager::set_unfocused_frame_color(int r, int g, int b)
 302 {
 303         frame_ucolor[0] = r;
 304         frame_ucolor[1] = g;
 305         frame_ucolor[2] = b;
 306 }
 307
 308 void WindowManager::get_unfocused_frame_color(int *r, int *g, int *b) const
 309 {
 310         *r = frame_ucolor[0];
 311         *g = frame_ucolor[1];
 312         *b = frame_ucolor[2];
 313 }
 314
 315 void WindowManager::set_background(const Pixmap *pixmap)
 316 {
 317         if(background) {
 318                 delete background;
 319         }
 320
 321         if(pixmap) {
 322                 background = new Pixmap(*pixmap);
 323         }
 324         else {
 325                 background = 0;
 326         }
 327 }
 328
 329 const Pixmap *WindowManager::get_background() const
 330 {
 331         return background;
 332 }
 333
 334 Window *WindowManager::get_grab_window() const
 335 {
 336         return grab_win;
 337 }
 338
 339 void WindowManager::grab_mouse(Window *win)
 340 {
 341         grab_win = win;
 342 }
 343
 344 void WindowManager::release_mouse()
 345 {
 346         grab_win = 0;
 347 }
 348
 349 void WindowManager::raise_window(Window *win)
 350 {
 351         if(!win) {
 352                 return;
 353         }
 354
 355         Window *parent = win->get_parent();
 356         if(parent != root_win) {
 357                 if(parent->get_parent() == root_win) {
 358                         win = parent;
 359                 }
 360                 else {
 361                         return;
 362                 }
 363         }
 364
 365         root_win->remove_child(win);
 366         root_win->add_child(win);
 367 }
 368
 369 void WindowManager::sink_window(Window *win)
 370 {
 371         if(!win) {
 372                 return;
 373         }
 374
 375         std::list<Window*>::iterator it;
 376         it = std::find(windows.begin(), windows.end(), win);
 377         if(it != windows.end()) {
 378                 windows.erase(it);
 379                 windows.push_front(win);
 380         }
 381 }
 382
 383 void WindowManager::maximize_window(Window *win)
 384 {
 385         win->normal_rect = win->rect;
 386
 387         Rect rect = get_screen_size();
 388
 389         Window *frame;
 390         if((frame = win->get_parent())) {
 391                 frame->normal_rect = frame->rect;
 392                 frame->resize(rect.width, rect.height);
 393                 frame->move(rect.x, rect.y);
 394
 395                 rect.width -= frame_thickness * 2;
 396                 rect.height -= frame_thickness * 2 + titlebar_thickness;
 397         }
 398         else {
 399                 win->move(0, 0);
 400         }
 401
 402         win->resize(rect.width, rect.height);
 403         win->set_state(Window::STATE_MAXIMIZED);
 404 }
 405
 406 void WindowManager::unmaximize_window(Window *win)
 407 {
 408         win->resize(win->normal_rect.width, win->normal_rect.height);
 409         win->move(win->normal_rect.x, win->normal_rect.y);
 410
 411         Window *frame;
 412         if((frame = win->get_parent())) {
 413                 frame->resize(frame->normal_rect.width, frame->normal_rect.height);
 414                 frame->move(frame->normal_rect.x, frame->normal_rect.y);
 415         }
 416
 417         win->set_state(Window::STATE_NORMAL);
 418 }
 419
 420 static void display(Window *win)
 421 {
 422         //frame display:
 423         Window *child = win->get_children()[0];
 424         int r, g, b;
 425         Rect abs_rect = win->get_absolute_rect();
 426
 427         //TODO 5 not hardcoded
 428         set_text_position(abs_rect.x + 5, abs_rect.y + 15);
 429         set_text_color(255, 255, 255);
 430
 431         if(child == wm->get_focused_window()) {
 432                 wm->get_focused_frame_color(&r, &g, &b);
 433                 fill_rect(abs_rect, r, g, b);
 434         }
 435         else {
 436                 wm->get_unfocused_frame_color(&r, &g, &b);
 437                 fill_rect(win->get_absolute_rect(), r, g, b);
 438         }
 439
 440         draw_text(child->get_title());
 441 }
 442
 443 static int prev_x, prev_y;
 444
 445 static void mouse(Window *win, int bn, bool pressed, int x, int y)
 446 {
 447         static long last_click = 0;
 448
 449         if(bn == 0) {
 450                 if(pressed) {
 451                         wm->grab_mouse(win);
 452                         wm->raise_window(win);
 453                         prev_x = x;
 454                         prev_y = y;
 455                 }
 456                 else {
 457                         long time = winnie_get_time();
 458                         if((time - last_click) < DCLICK_INTERVAL) {
 459                                 Window *child = win->get_children()[0];
 460                                 Window::State state = child->get_state();
 461                                 if(state == Window::STATE_MAXIMIZED) {
 462                                         wm->unmaximize_window(child);
 463                                 }
 464                                 else if(state == Window::STATE_NORMAL) {
 465                                         wm->maximize_window(child);
 466                                 }
 467                         }
 468                         last_click = time;
 469
 470                         wm->release_mouse();
 471                 }
 472         }
 473 }
 474
 475 static void motion(Window *win, int x, int y)
 476 {
 477         int left_bn = get_button(0);
 478
 479         if(left_bn) {
 480                 int dx = x - prev_x;
 481                 int dy = y - prev_y;
 482                 prev_x = x - dx;
 483                 prev_y = y - dy;
 484
 485                 if(win->get_children()[0]->get_state() != Window::STATE_MAXIMIZED) {
 486                         Rect rect = win->get_rect();
 487                         win->move(rect.x + dx, rect.y + dy);
 488                 }
 489         }
 490 }