application/window.c

   1 /*
   2  * Copyright 2022 Olaf Wintermann
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  17  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  19  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  20  * DEALINGS IN THE SOFTWARE.
  21  */
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26
  27 #include "window.h"
  28 #include "main.h"
  29 #include "player.h"
  30
  31 #include "Fsb.h"
  32
  33 static MainWindow *main_window;
  34
  35 static void WindowCreateMenu(MainWindow *win, Widget parent, Arg *args, int nargs);
  36
  37 static void FileOpenCB(Widget w, void *udata, void *cdata);
  38 static void ViewFullscreenCB(Widget w, void *udata, void *cdata);
  39
  40 static void window_close_handler(Widget window, void *udata, void *cdata) {
  41     WindowClosePlayer(main_window);
  42     ApplicationExit();
  43 }
  44
  45 static unsigned int keycodeF;
  46
  47 static void windowKeyEH(Widget widget, XtPointer data, XEvent *event, Boolean *dispatch) {
  48     MainWindow *win = data;
  49     if(win->fullscreen && event->xkey.keycode == keycodeF) {
  50         WindowFullscreen(main_window, FALSE);
  51         *dispatch = FALSE;
  52     }
  53 }
  54
  55 static void resizeEH(Widget widget, XtPointer data, XEvent *event, Boolean *dispatch) {
  56     WindowAdjustAspectRatio(data);
  57 }
  58
  59 static void playerWidgetInputCB(Widget widget, XtPointer u, XtPointer c) {
  60     MainWindow *win = u;
  61     XmDrawingAreaCallbackStruct *cb = c;
  62
  63     if(win->player && win->player->isactive) {
  64         PlayerHandleInput(win, win->player, cb);
  65     }
  66 }
  67
  68 MainWindow* WindowCreate(Display *display) {
  69     Arg args[32];
  70     int n;
  71
  72     MainWindow *window = malloc(sizeof(MainWindow));
  73     memset(window, 0, sizeof(MainWindow));
  74     main_window = window;
  75
  76     // toplevel window
  77     n = 0;
  78     XtSetArg(args[n], XmNtitle, APP_NAME); n++;
  79     window->window = XtAppCreateShell(
  80             APP_NAME,
  81             APP_CLASS,
  82             applicationShellWidgetClass,
  83             //vendorShellWidgetClass,
  84             display,
  85             args,
  86             n);
  87
  88     // close handler
  89     Atom wm_delete_window;
  90     wm_delete_window = XmInternAtom(
  91             display,
  92             "WM_DELETE_WINDOW",
  93             0);
  94     XmAddWMProtocolCallback(
  95             window->window,
  96             wm_delete_window,
  97             window_close_handler,
  98             window);
  99
 100     // resize handler
 101     XtAddEventHandler(window->window, StructureNotifyMask, False, resizeEH, window);
 102
 103     n = 0;
 104     XtSetArg(args[n], XmNwidth, 360); n++;
 105     XtSetArg(args[n], XmNheight, 220); n++;
 106     XtSetArg(args[n], XmNshadowThickness, 0); n++;
 107     Widget container = XmCreateForm(window->window, "form", args, n);
 108     XtManageChild(container);
 109     XtAddEventHandler(container, KeyPressMask, FALSE, windowKeyEH, window);
 110
 111     n = 0;
 112     XtSetArg(args[n], XmNleftAttachment, XmATTACH_FORM); n++;
 113     XtSetArg(args[n], XmNrightAttachment, XmATTACH_FORM); n++;
 114     XtSetArg(args[n], XmNtopAttachment, XmATTACH_FORM); n++;
 115     WindowCreateMenu(window, container, args, n);
 116
 117     n = 0;
 118     XtSetArg(args[n], XmNleftAttachment, XmATTACH_FORM); n++;
 119     XtSetArg(args[n], XmNrightAttachment, XmATTACH_FORM); n++;
 120     XtSetArg(args[n], XmNbottomAttachment, XmATTACH_FORM); n++;
 121     XtSetArg(args[n], XmNtopAttachment, XmATTACH_WIDGET); n++;
 122     XtSetArg(args[n], XmNtopWidget, window->menubar); n++;
 123     XtSetArg(args[n], XmNbackground, BlackPixelOfScreen(XtScreen(window->window))); n++;
 124     window->player_widget = XmCreateDrawingArea(container, "player", args, n);
 125     XtManageChild(window->player_widget);
 126     XtAddCallback(window->player_widget, XmNinputCallback, playerWidgetInputCB, window);
 127     XmProcessTraversal(window->player_widget, XmTRAVERSE_CURRENT);
 128
 129     // get F keycode
 130     keycodeF = XKeysymToKeycode(XtDisplay(window->window), XStringToKeysym("F"));
 131
 132     return window;
 133 }
 134
 135 MainWindow* GetMainWindow(void) {
 136     return main_window;
 137 }
 138
 139 void WindowShow(MainWindow *win) {
 140     XtRealizeWidget(win->window);
 141 }
 142
 143 /*
 144  * Creates a XmPushButton menu item
 145  */
 146 static Widget createMenuItem(
 147         Widget menu,
 148         char *name,
 149         char *label,
 150         char mnemonic,
 151         const char *accelerator,
 152         char *accelerator_text,
 153         XtCallbackProc callback,
 154         void *cbData)
 155 {
 156     Arg args[16];
 157     int n = 0;
 158
 159     XmString s1 = XmStringCreateSimple(label);
 160     XtSetArg(args[n], XmNlabelString, s1); n++;
 161     XtSetArg(args[n], XmNmnemonic, mnemonic); n++;
 162     XmString at = NULL;
 163     if(accelerator && accelerator_text) {
 164         at = XmStringCreateSimple(accelerator_text);
 165         XtSetArg(args[n], XmNaccelerator, accelerator); n++;
 166         XtSetArg(args[n], XmNacceleratorText, at); n++;
 167     }
 168
 169     Widget menuItem = XmCreatePushButtonGadget(menu, name, args, n);
 170     XtManageChild(menuItem);
 171     XmStringFree(s1);
 172     if(at) XmStringFree(at);
 173
 174     if(callback) {
 175         XtAddCallback(menuItem, XmNactivateCallback, (XtCallbackProc)callback, cbData);
 176     }
 177
 178     return menuItem;
 179 }
 180
 181 static void WindowCreateMenu(MainWindow *win, Widget parent, Arg *mbargs, int nmbargs) {
 182     Widget menubar = XmCreateMenuBar(parent, "menubar", mbargs, nmbargs);
 183     XtManageChild(menubar);
 184     win->menubar = menubar;
 185
 186     Arg args[16];
 187     int n;
 188
 189     // menus
 190     XmString s = XmStringCreateSimple("File");
 191     Widget fileMenuItem = XtVaCreateManagedWidget(
 192             "menuitem",
 193             xmCascadeButtonWidgetClass,
 194             menubar,
 195             XmNlabelString, s,
 196             NULL);
 197     XmStringFree(s);
 198     Widget fileMenu = XmVaCreateSimplePulldownMenu(menubar, "menu", 0, NULL, NULL);
 199
 200     s = XmStringCreateSimple("Playback");
 201     Widget playMenuItem = XtVaCreateManagedWidget(
 202             "menuitem",
 203             xmCascadeButtonWidgetClass,
 204             menubar,
 205             XmNlabelString, s,
 206             NULL);
 207     XmStringFree(s);
 208     Widget playMenu = XmVaCreateSimplePulldownMenu(menubar, "menu", 1, NULL, NULL);
 209
 210     s = XmStringCreateSimple("View");
 211     Widget viewMenuItem = XtVaCreateManagedWidget(
 212             "menuitem",
 213             xmCascadeButtonWidgetClass,
 214             menubar,
 215             XmNlabelString, s,
 216             NULL);
 217     XmStringFree(s);
 218     Widget viewMenu = XmVaCreateSimplePulldownMenu(menubar, "menu", 2, NULL, NULL);
 219
 220     // file menu
 221     createMenuItem(fileMenu, "fileOpen", "Open...", 'O', "Ctrl<Key>O", "Ctrl+O", FileOpenCB, NULL);
 222
 223     // view menu
 224     createMenuItem(viewMenu, "viewFullscreen", "Fullscreen", 'F', "<Key>F", "F", ViewFullscreenCB, NULL);
 225 }
 226
 227 void go_fullscreen(Display *dsp, Window win)
 228 {
 229   XEvent xev;
 230   Atom wm_state = XInternAtom(dsp, "_NET_WM_STATE", False);
 231   Atom fullscreen = XInternAtom(dsp, "_NET_WM_STATE_FULLSCREEN", False);
 232   memset(&xev, 0, sizeof(xev));
 233   xev.type = ClientMessage;
 234   xev.xclient.window = win;
 235   xev.xclient.message_type = wm_state;
 236   xev.xclient.format = 32;
 237   xev.xclient.data.l[0] = 1; // _NET_WM_STATE_ADD
 238   xev.xclient.data.l[1] = fullscreen;
 239   xev.xclient.data.l[2] = 0;
 240   XSendEvent(dsp, DefaultRootWindow(dsp), False,
 241     SubstructureNotifyMask, &xev);
 242 }
 243
 244 static Atom net_wm_state;
 245 static Atom net_wm_state_fullscreen;
 246 static int net_wm_atoms_initialized = 0;
 247
 248 void WindowFullscreen(MainWindow *win, bool enableFullscreen) {
 249     Display *dpy = XtDisplay(win->window);
 250
 251     // init net_wm_state atoms
 252     if(!net_wm_atoms_initialized) {
 253         net_wm_state = XInternAtom(dpy, "_NET_WM_STATE", False);
 254         net_wm_state_fullscreen = XInternAtom(dpy, "_NET_WM_STATE_FULLSCREEN", False);
 255         net_wm_atoms_initialized = 1;
 256     }
 257
 258     WindowMenubarSetVisible(win, !enableFullscreen);
 259     if(enableFullscreen && !win->fullscreen) {
 260         XtUnmanageChild(main_window->menubar);
 261         main_window->fullscreen = TRUE;
 262     } else if(!enableFullscreen && win->fullscreen) {
 263         XtManageChild(main_window->menubar);
 264         main_window->fullscreen = FALSE;
 265     }
 266
 267     XEvent ev;
 268     memset(&ev, 0, sizeof(XEvent));
 269     ev.type = ClientMessage;
 270     ev.xclient.window = XtWindow(win->window);
 271     ev.xclient.message_type = net_wm_state;
 272     ev.xclient.format = 32;
 273     ev.xclient.data.l[0] = enableFullscreen ? 1 : 0;
 274     ev.xclient.data.l[1] = net_wm_state_fullscreen;
 275     ev.xclient.data.l[2] = 0;
 276     XSendEvent(dpy, DefaultRootWindow(dpy), False, SubstructureNotifyMask | SubstructureRedirectMask, &ev);
 277 }
 278
 279 void WindowMenubarSetVisible(MainWindow *win, bool visible) {
 280     if(visible) {
 281         XtManageChild(main_window->menubar);
 282         XtVaSetValues(main_window->player_widget, XmNtopAttachment, XmATTACH_WIDGET, XmNtopWidget, main_window->menubar, NULL);
 283     } else {
 284         XtUnmanageChild(main_window->menubar);
 285         XtVaSetValues(main_window->player_widget, XmNtopAttachment, XmATTACH_FORM, NULL);
 286     }
 287 }
 288
 289
 290
 291 static void filedialog_end(
 292         Widget widget,
 293         MainWindow *data,
 294         XmFileSelectionBoxCallbackStruct *selection)
 295 {
 296     XtUnmanageChild(widget);
 297     XtDestroyWidget(widget);
 298 }
 299
 300 static void filedialog_select(
 301         Widget widget,
 302         MainWindow *data,
 303         XmFileSelectionBoxCallbackStruct *selection)
 304 {
 305     char *value = NULL;
 306     if(selection->value) {
 307         XmStringGetLtoR(selection->value, XmSTRING_DEFAULT_CHARSET, &value);
 308         if(value) {
 309             if(data->file) {
 310                 XtFree(data->file);
 311             }
 312             data->file = value;
 313             // no need to free the value, because it is stored in MainWindow
 314
 315             PlayerOpenFile(data);
 316         }
 317     }
 318     filedialog_end(widget, data, NULL);
 319 }
 320
 321
 322
 323
 324 static void FileOpenCB(Widget w, void *udata, void *cdata) {
 325     MainWindow *win = main_window;
 326
 327     Arg args[16];
 328     int n = 0;
 329
 330     XtSetArg(args[n], XnNshowViewMenu, 1); n++;
 331     Widget dialog = XnCreateFileSelectionDialog(win->window, "dialog", args, n);
 332     XtAddCallback(dialog, XmNokCallback, (XtCallbackProc)filedialog_select, win);
 333     XtAddCallback(dialog, XmNcancelCallback, (XtCallbackProc)filedialog_end, win);
 334
 335     Widget dirUp = XnFileSelectionBoxGetChild(dialog, XnFSB_DIR_UP_BUTTON);
 336     XtUnmanageChild(dirUp);
 337
 338     XtManageChild(dialog);
 339 }
 340
 341 static void ViewFullscreenCB(Widget w, void *udata, void *cdata) {
 342     if(main_window->fullscreen) {
 343         WindowFullscreen(main_window, FALSE);
 344     } else {
 345         WindowFullscreen(main_window, TRUE);
 346     }
 347
 348 }
 349
 350 void WindowAdjustAspectRatio(MainWindow *win) {
 351     if(!win->player) return;
 352     if(!win->player->isactive || win->player->width <= 0 || win->player->height <= 0) return;
 353
 354     // we have a running player width video
 355     // adjust window aspect ratio (the window aspect ratio is different from
 356     // the video, because of window decoration, menubar and other extra controls)
 357
 358     Dimension win_width, win_height;
 359     XtVaGetValues(win->window, XmNwidth, &win_width, XmNheight, &win_height, NULL);
 360     Dimension player_width, player_height;
 361     XtVaGetValues(win->player_widget, XmNwidth, &player_width, XmNheight, &player_height, NULL);
 362
 363     double r = (double)win->player->width / (double)win->player->height;
 364     double p_width = player_width;
 365     double p_height = p_width / r;
 366
 367     Dimension new_width = p_width + win_width - player_width;
 368     Dimension new_height = p_height + win_height - player_height;
 369
 370     XSizeHints hints;
 371     hints.flags = PAspect;
 372     hints.min_aspect.x = new_width;
 373     hints.min_aspect.y = new_height;
 374     hints.max_aspect.x = new_width;
 375     hints.max_aspect.y = new_height;
 376     XSetWMNormalHints(XtDisplay(win->window), XtWindow(win->window), &hints);
 377 }
 378
 379 void WindowClosePlayer(MainWindow *win) {
 380     if(win->player) {
 381         PlayerDestroy(win->player);
 382     }
 383     win->player = NULL;
 384 }