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 "shalloc.h"
  31 #include "text.h"
  32 #include "window.h"
  33 #include "winnie.h"
  34 #include "wm.h"
  35
  36 #define DCLICK_INTERVAL 400
  37
  38 WindowManager *wm;
  39
  40 static void display(Window *win);
  41 static void mouse(Window *win, int bn, bool pressed, int x, int y);
  42 static void motion(Window *win, int x, int y);
  43
  44 bool init_window_manager()
  45 {
  46         void *wm_mem;
  47         if(!(wm_mem = sh_malloc(sizeof *wm))) {
  48                 return false;
  49         }
  50
  51         wm = new (wm_mem) WindowManager;
  52
  53         get_subsys()->wm_offset = (int)((char*)wm - (char*)get_pool());
  54
  55         return true;
  56 }
  57
  58 void destroy_window_manager()
  59 {
  60         wm->~WindowManager();
  61         sh_free(wm);
  62 }
  63
  64 void WindowManager::create_frame(Window *win)
  65 {
  66         Window *frame = new Window;
  67         Window *parent = win->get_parent();
  68
  69         frame->set_display_callback(display);
  70         frame->set_mouse_button_callback(mouse);
  71         frame->set_mouse_motion_callback(motion);
  72         frame->set_focusable(false);
  73         frame->add_child(win);
  74
  75         windows.push_back(frame);
  76
  77         Rect win_rect = win->get_rect();
  78         frame->move(win_rect.x - frame_thickness,
  79                         win_rect.y - frame_thickness - titlebar_thickness);
  80         frame->resize(win_rect.width + frame_thickness * 2,
  81                         win_rect.height + frame_thickness * 2 + titlebar_thickness);
  82
  83         win->move(frame_thickness, frame_thickness + titlebar_thickness);
  84         parent->add_child(frame);
  85 }
  86
  87 void WindowManager::destroy_frame(Window *win)
  88 {
  89         Window *frame = win->parent;
  90         if(!frame) {
  91                 return;
  92         }
  93
  94         if(grab_win == win) {
  95                 release_mouse();
  96         }
  97
  98         std::list<Window*>::iterator it;
  99         it = std::find(windows.begin(), windows.end(), frame);
 100         if(it != windows.end()) {
 101                 root_win->add_child(win);
 102                 windows.erase(it);
 103                 delete frame;
 104         }
 105 }
 106
 107 WindowManager::WindowManager()
 108 {
 109         if(!wm) {
 110                 wm = this;
 111         } else {
 112                 throw std::runtime_error("Trying to create a second instance of WindowManager!\n");
 113         }
 114
 115         root_win = new Window;
 116         root_win->resize(get_screen_size().width, get_screen_size().height);
 117         root_win->move(0, 0);
 118         root_win->set_managed(false);
 119
 120         grab_win = 0;
 121         focused_win = 0;
 122         background = 0;
 123
 124         bg_color[0] = 210;
 125         bg_color[1] = 106;
 126         bg_color[2] = 106;
 127
 128         frame_thickness = 8;
 129         titlebar_thickness = 16;
 130
 131         set_focused_frame_color(0, 0, 0);
 132         set_unfocused_frame_color(200, 200, 200);
 133
 134         mouse_cursor.set_image(mouse_cursor_width, mouse_cursor_height);
 135         unsigned char *pixels = mouse_cursor.get_image();
 136
 137         for(int i=0; i<mouse_cursor_height; i++) {
 138                 for(int j=0; j<mouse_cursor_width; j++) {
 139                         int val = mouse_cursor_bw[i * mouse_cursor_width + j];
 140                         *pixels++ = val;
 141                         *pixels++ = val;
 142                         *pixels++ = val;
 143                         *pixels++ = 255;
 144                 }
 145         }
 146 }
 147
 148 WindowManager::~WindowManager()
 149 {
 150         delete root_win;
 151 }
 152
 153 void WindowManager::invalidate_region(const Rect &rect)
 154 {
 155         dirty_rects.push_back(rect);
 156 }
 157
 158 void WindowManager::process_windows()
 159 {
 160         if(dirty_rects.empty()) {
 161                 return;
 162         }
 163
 164         std::list<Rect>::iterator drit = dirty_rects.begin();
 165         Rect uni = *drit++;
 166         while(drit != dirty_rects.end()) {
 167                 uni = rect_union(uni, *drit++);
 168         }
 169         dirty_rects.clear();
 170
 171         wait_vsync();
 172
 173         if(!background) {
 174                 fill_rect(uni, bg_color[0], bg_color[1], bg_color[2]);
 175         }
 176         else {
 177                 blit(background->pixels, Rect(0, 0, background->width, background->height),
 178                                 get_framebuffer(), get_screen_size(), 0, 0);
 179         }
 180
 181         root_win->draw_children(uni);
 182
 183         // draw mouse cursor
 184         int mouse_x, mouse_y;
 185         get_pointer_pos(&mouse_x, &mouse_y);
 186
 187         blit_key(mouse_cursor.get_image(), mouse_cursor.get_rect(),
 188                         get_framebuffer(), get_screen_size(), mouse_x, mouse_y,
 189                         0, 0, 0);
 190
 191         Rect mouse_rect(mouse_x, mouse_y, mouse_cursor.get_width(), mouse_cursor.get_height());
 192         invalidate_region(mouse_rect);
 193
 194         gfx_update(uni);
 195 }
 196
 197 void WindowManager::add_window(Window *win)
 198 {
 199         if(!win || win == root_win) {
 200                 return;
 201         }
 202
 203         root_win->add_child(win);
 204
 205         if(windows.empty()) {
 206                 focused_win = win;
 207         }
 208
 209         if(win->get_managed()) {
 210                 create_frame(win);
 211         }
 212
 213         windows.push_back(win);
 214 }
 215
 216 void WindowManager::remove_window(Window *win)
 217 {
 218         std::list<Window*>::iterator it;
 219         it = std::find(windows.begin(), windows.end(), win);
 220
 221         if(it != windows.end()) {
 222                 windows.erase(it);
 223         }
 224 }
 225
 226 void WindowManager::set_focused_window(Window *win)
 227 {
 228         if(win && win == focused_win) {
 229                 return;
 230         }
 231
 232         Window *parent;
 233         if(focused_win) {
 234                 // invalidate the frame (if any)
 235                 parent = focused_win->get_parent();
 236                 if(parent && parent != root_win) {
 237                         parent->invalidate();
 238                         fill_rect(parent->get_absolute_rect(), frame_ucolor[0], frame_ucolor[1], frame_ucolor[2]);
 239                 }
 240         }
 241
 242         if(!win) {
 243                 focused_win = 0;
 244                 return;
 245         }
 246
 247         if(win->get_focusable()) {
 248                 focused_win = win;
 249                 parent = focused_win->get_parent();
 250                 fill_rect(parent->get_absolute_rect(), frame_fcolor[0], frame_fcolor[1], frame_fcolor[2]);
 251                 return;
 252         }
 253
 254         Window **children = win->get_children();
 255         for(int i=0; i<win->get_children_count(); i++) {
 256                 if(children[0]->get_focusable()) {
 257                         set_focused_window(children[0]);
 258                         fill_rect(win->get_absolute_rect(), frame_fcolor[0], frame_fcolor[1], frame_fcolor[2]);
 259                         return;
 260                 }
 261         }
 262
 263         focused_win = 0;
 264 }
 265
 266 const Window *WindowManager::get_focused_window() const
 267 {
 268         return focused_win;
 269 }
 270
 271 Window *WindowManager::get_focused_window()
 272 {
 273         return focused_win;
 274 }
 275
 276 Window *WindowManager::get_window_at_pos(int pointer_x, int pointer_y)
 277 {
 278         Window *root_win = wm->get_root_window();
 279         Window **children = root_win->get_children();
 280         for(int i=root_win->get_children_count() - 1; i>=0; i--) {
 281                 if(children[i]->contains_point(pointer_x, pointer_y)) {
 282                         return children[i];
 283                 }
 284         }
 285
 286         return 0;
 287 }
 288
 289 Window *WindowManager::get_root_window() const
 290 {
 291         return root_win;
 292 }
 293
 294 void WindowManager::set_focused_frame_color(int r, int g, int b)
 295 {
 296         frame_fcolor[0] = r;
 297         frame_fcolor[1] = g;
 298         frame_fcolor[2] = b;
 299 }
 300
 301 void WindowManager::get_focused_frame_color(int *r, int *g, int *b) const
 302 {
 303         *r = frame_fcolor[0];
 304         *g = frame_fcolor[1];
 305         *b = frame_fcolor[2];
 306 }
 307
 308 void WindowManager::set_unfocused_frame_color(int r, int g, int b)
 309 {
 310         frame_ucolor[0] = r;
 311         frame_ucolor[1] = g;
 312         frame_ucolor[2] = b;
 313 }
 314
 315 void WindowManager::get_unfocused_frame_color(int *r, int *g, int *b) const
 316 {
 317         *r = frame_ucolor[0];
 318         *g = frame_ucolor[1];
 319         *b = frame_ucolor[2];
 320 }
 321
 322 void WindowManager::set_background(const Pixmap *pixmap)
 323 {
 324         if(background) {
 325                 delete background;
 326         }
 327
 328         if(pixmap) {
 329                 background = new Pixmap(*pixmap);
 330         }
 331         else {
 332                 background = 0;
 333         }
 334 }
 335
 336 const Pixmap *WindowManager::get_background() const
 337 {
 338         return background;
 339 }
 340
 341 Window *WindowManager::get_grab_window() const
 342 {
 343         return grab_win;
 344 }
 345
 346 void WindowManager::grab_mouse(Window *win)
 347 {
 348         grab_win = win;
 349 }
 350
 351 void WindowManager::release_mouse()
 352 {
 353         grab_win = 0;
 354 }
 355
 356 void WindowManager::raise_window(Window *win)
 357 {
 358         if(!win) {
 359                 return;
 360         }
 361
 362         Window *parent = win->get_parent();
 363         if(parent != root_win) {
 364                 if(parent->get_parent() == root_win) {
 365                         win = parent;
 366                 }
 367                 else {
 368                         return;
 369                 }
 370         }
 371
 372         root_win->remove_child(win);
 373         root_win->add_child(win);
 374 }
 375
 376 void WindowManager::sink_window(Window *win)
 377 {
 378         if(!win) {
 379                 return;
 380         }
 381
 382         std::list<Window*>::iterator it;
 383         it = std::find(windows.begin(), windows.end(), win);
 384         if(it != windows.end()) {
 385                 windows.erase(it);
 386                 windows.push_front(win);
 387         }
 388 }
 389
 390 void WindowManager::maximize_window(Window *win)
 391 {
 392         win->normal_rect = win->rect;
 393
 394         Rect rect = get_screen_size();
 395
 396         Window *frame;
 397         if((frame = win->get_parent())) {
 398                 frame->normal_rect = frame->rect;
 399                 frame->resize(rect.width, rect.height);
 400                 frame->move(rect.x, rect.y);
 401
 402                 rect.width -= frame_thickness * 2;
 403                 rect.height -= frame_thickness * 2 + titlebar_thickness;
 404         }
 405         else {
 406                 win->move(0, 0);
 407         }
 408
 409         win->resize(rect.width, rect.height);
 410         win->set_state(Window::STATE_MAXIMIZED);
 411 }
 412
 413 void WindowManager::unmaximize_window(Window *win)
 414 {
 415         win->resize(win->normal_rect.width, win->normal_rect.height);
 416         win->move(win->normal_rect.x, win->normal_rect.y);
 417
 418         Window *frame;
 419         if((frame = win->get_parent())) {
 420                 frame->resize(frame->normal_rect.width, frame->normal_rect.height);
 421                 frame->move(frame->normal_rect.x, frame->normal_rect.y);
 422         }
 423
 424         win->set_state(Window::STATE_NORMAL);
 425 }
 426
 427 static void display(Window *win)
 428 {
 429         //frame display:
 430         Window *child = win->get_children()[0];
 431         int r, g, b;
 432         Rect abs_rect = win->get_absolute_rect();
 433
 434         //TODO 5 not hardcoded
 435         set_text_position(abs_rect.x + 5, abs_rect.y + 15);
 436         set_text_color(255, 255, 255);
 437
 438         if(child == wm->get_focused_window()) {
 439                 wm->get_focused_frame_color(&r, &g, &b);
 440                 fill_rect(abs_rect, r, g, b);
 441         }
 442         else {
 443                 wm->get_unfocused_frame_color(&r, &g, &b);
 444                 fill_rect(win->get_absolute_rect(), r, g, b);
 445         }
 446
 447         draw_text(child->get_title());
 448 }
 449
 450 static int prev_x, prev_y;
 451
 452 static void mouse(Window *win, int bn, bool pressed, int x, int y)
 453 {
 454         static long last_click = 0;
 455
 456         if(bn == 0) {
 457                 if(pressed) {
 458                         wm->grab_mouse(win);
 459                         wm->raise_window(win);
 460                         prev_x = x;
 461                         prev_y = y;
 462                 }
 463                 else {
 464                         long time = winnie_get_time();
 465                         if((time - last_click) < DCLICK_INTERVAL) {
 466                                 Window *child = win->get_children()[0];
 467                                 Window::State state = child->get_state();
 468                                 if(state == Window::STATE_MAXIMIZED) {
 469                                         wm->unmaximize_window(child);
 470                                 }
 471                                 else if(state == Window::STATE_NORMAL) {
 472                                         wm->maximize_window(child);
 473                                 }
 474                         }
 475                         last_click = time;
 476
 477                         wm->release_mouse();
 478                 }
 479         }
 480 }
 481
 482 static void motion(Window *win, int x, int y)
 483 {
 484         int left_bn = get_button(0);
 485
 486         if(left_bn) {
 487                 int dx = x - prev_x;
 488                 int dy = y - prev_y;
 489                 prev_x = x - dx;
 490                 prev_y = y - dy;
 491
 492                 if(win->get_children()[0]->get_state() != Window::STATE_MAXIMIZED) {
 493                         Rect rect = win->get_rect();
 494                         win->move(rect.x + dx, rect.y + dy);
 495                 }
 496         }
 497 }