sm.c

   1 /*
   2 #     sm.c
   3 #     Copyright (C) 2006 - 2012 Joachim Breitner
   4 #
   5 #     The Code for making a window fullscreen was taken from src/fullscreen.c in
   6 #     the geeqie package:
   7 #     Copyright (C) 2004 John Ellis
   8 #                   2008 - 2010 The Geeqie Team
   9 #
  10 #     This program is free software; you can redistribute it and/or modify
  11 #     it under the terms of the GNU General Public License as published by
  12 #     the Free Software Foundation; either version 2 of the License, or
  13 #     (at your option) any later version.
  14 #
  15 #     This program is distributed in the hope that it will be useful,
  16 #     but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 #     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 #     GNU General Public License for more details.
  19 #
  20 #     You should have received a copy of the GNU General Public License
  21 #     along with this program; if not, write to the Free Software
  22 #     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  23 */
  24
  25 #include <gtk/gtk.h>
  26 #include <gdk/gdk.h>
  27 #include <pango/pango.h>
  28 #include <string.h>
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <math.h>
  32
  33 #include "config.h"
  34
  35 #ifndef _GNU_SOURCE
  36 #define _GNU_SOURCE                             /* for getopt_long */
  37 #endif
  38 #include <getopt.h>
  39
  40 #define min(x,y) ((x) < (y) ? (x) : (y))
  41
  42 #define AUTOHIDE_TIMEOUT 3
  43
  44 static gboolean quality = TRUE;
  45
  46 static int timeout_id=0;
  47
  48 static GtkWidget* window;
  49 static GtkWidget* draw;
  50 static GdkCursor *cursor;
  51 static GtkWidget* quit;
  52 static GtkWidget* tv;
  53 static GtkWidget* entry_widget;
  54 static GtkSettings* settings;
  55 static GtkTextBuffer* tb;
  56 static PangoFontDescription *font;
  57 static char *foreground = NULL;
  58 static char *background = NULL;
  59 static char *fontdesc = NULL;
  60 static int rotation = 0; // 0 = normal, 1 = left, 2 = inverted, 3 = right
  61 static int alignment = 0; // 0 = centered, 1 = left-aligned, 2 = right-aligned
  62 static GString *partial_input;
  63 static gulong quality_high_handler = 0;
  64 static gulong text_change_handler;
  65
  66 gboolean hide_entry(gpointer *user_data) {
  67         gtk_widget_hide(entry_widget);
  68         gtk_widget_grab_focus(draw);
  69         gtk_widget_queue_draw(draw);
  70         gdk_window_set_cursor(gtk_widget_get_window(GTK_WIDGET(draw)), cursor);
  71         return FALSE;
  72 }
  73
  74 static void show_entry() {
  75         if (timeout_id) {
  76                 g_source_remove(timeout_id);
  77                 timeout_id = 0;
  78         }
  79         gtk_widget_show(entry_widget);
  80         gtk_widget_grab_focus(tv);
  81         gdk_window_set_cursor(gtk_widget_get_window(GTK_WIDGET(draw)), NULL);
  82
  83         timeout_id = g_timeout_add_seconds (AUTOHIDE_TIMEOUT, (GSourceFunc)hide_entry, NULL);
  84 }
  85
  86 static void clear_text(GtkAccelGroup *accel, GObject *window, guint keyval,  GdkModifierType modifier) {
  87         if( gtk_text_buffer_get_char_count(tb) ) {
  88                 gtk_text_buffer_set_text(tb,"",-1);
  89                 show_entry();
  90         } else {
  91                 gtk_main_quit();
  92         }
  93 }
  94
  95 static char *get_text() {
  96         GtkTextIter start, end;
  97         gtk_text_buffer_get_start_iter(tb,&start);
  98         gtk_text_buffer_get_end_iter(tb,&end);
  99         return gtk_text_buffer_get_text(tb, &start, &end, FALSE);
 100 }
 101
 102 static void hq(gboolean q, gboolean force){
 103         if (q != quality) {
 104                 if (q)
 105                         gtk_settings_set_long_property(settings,"gtk-xft-antialias",1,"Hier halt");
 106                 else
 107                         gtk_settings_set_long_property(settings,"gtk-xft-antialias",0,"Hier halt");
 108         }
 109         else
 110                 if (force)
 111                         gtk_widget_queue_draw(draw);
 112
 113         quality = q;
 114 }
 115
 116 static gboolean quality_high (gpointer data) {
 117         hq(TRUE, FALSE);
 118         return FALSE;
 119 }
 120
 121 static void redraw(GtkWidget *draw, cairo_t *cr, gpointer data) {
 122         int q;
 123         const char *text = get_text();
 124
 125         if (strlen(text) > 0) {
 126                 int w1, h1;
 127                 static PangoLayout* layout;
 128
 129                 layout = gtk_widget_create_pango_layout(draw, get_text());
 130                 pango_layout_set_font_description(layout, font);
 131
 132                 switch(alignment){
 133                         case 0: // center
 134                                 pango_layout_set_alignment(layout,PANGO_ALIGN_CENTER);
 135                                 break;
 136                         case 1: // left
 137                                 pango_layout_set_alignment(layout,PANGO_ALIGN_LEFT);
 138                                 break;
 139                         case 2: // left
 140                                 pango_layout_set_alignment(layout,PANGO_ALIGN_RIGHT);
 141                                 break;
 142                         default:
 143                                 // we propably don't want to annoy the user, so default to
 144                                 // the old default-behaviour:
 145                                 pango_layout_set_alignment(layout,PANGO_ALIGN_CENTER);
 146                 }
 147
 148                 pango_layout_get_pixel_size(layout, &w1, &h1);
 149                 if (w1>0 && h1>0) {
 150                         int w2 = gtk_widget_get_allocated_width(draw);
 151                         int h2 = gtk_widget_get_allocated_height(draw);
 152
 153                         int rw1, rh1;
 154                         if (rotation == 0 || rotation == 2) {
 155                                 rw1 = w1;
 156                                 rh1 = h1;
 157                         } else {
 158                                 rw1 = h1;
 159                                 rh1 = w1;
 160                         }
 161
 162                         double s = min ((double)w2/rw1, (double)h2/rh1);
 163
 164                         cairo_save(cr);
 165
 166                         GdkRGBA color;
 167                         gtk_style_context_get_color (gtk_widget_get_style_context(draw),
 168                                 GTK_STATE_NORMAL, &color);
 169                         gdk_cairo_set_source_rgba(cr, &color);
 170
 171
 172                         cairo_translate(cr, w2/2, h2/2);
 173                         cairo_rotate(cr, rotation * M_PI_2);
 174                         cairo_scale(cr, s, s);
 175                         cairo_translate(cr, -w1/2, -h1/2);
 176                         pango_cairo_show_layout (cr, layout);
 177
 178                         cairo_restore(cr);
 179
 180                         if (quality_high_handler)
 181                                 g_source_remove(quality_high_handler);
 182                         quality_high_handler = g_timeout_add(0, quality_high, NULL);
 183                 }
 184                 g_object_unref(layout);
 185         }
 186 }
 187
 188 static gboolean text_keypress(GtkWidget *widget, GdkEventButton *event, gpointer *user_data) {
 189         // forward signal to the text view
 190         gboolean ret;
 191         g_signal_emit_by_name(tv, "key-press-event", event, &ret);
 192         gtk_widget_grab_focus(tv);
 193         return ret;
 194 }
 195
 196 static gboolean text_clicked(GtkWidget *widget, GdkEventButton *event, gpointer *user_data) {
 197         show_entry();
 198         if (event->type == GDK_BUTTON_PRESS && event->button == 2) {
 199                 GtkClipboard *cb = gtk_clipboard_get(GDK_SELECTION_PRIMARY);
 200
 201                 gchar *txt = gtk_clipboard_wait_for_text(cb);
 202                 if (txt != NULL) {
 203                         gtk_text_buffer_set_text(tb,txt,-1);
 204                         g_free(txt);
 205                 }
 206
 207         }
 208         return FALSE;
 209 }
 210
 211 static gboolean read_chan(GIOChannel *chan, GIOCondition condition, gpointer data){
 212         gchar buf[1024];
 213         GString *input;
 214         GIOStatus stat = G_IO_STATUS_NORMAL;
 215         gsize read;
 216         GError *err = NULL;
 217
 218         while ((stat = g_io_channel_read_chars(chan, buf, sizeof(buf), &read, &err)) == G_IO_STATUS_NORMAL && err == NULL) {
 219                 g_string_append_len(partial_input, buf, read);
 220         }
 221
 222         if (err != NULL)
 223         {
 224             fprintf (stderr, "Unable to read stdin: %s\n", err->message);
 225             g_error_free (err);
 226             return TRUE;
 227         }
 228
 229
 230         if (stat == G_IO_STATUS_EOF) {
 231                 // There is an end of file, so use the whole input
 232                 input = g_string_new_len(partial_input->str, partial_input->len);
 233                 g_string_truncate(partial_input, 0);
 234         } else {
 235                 // There is no end of file. Check for form feed characters.
 236                 // Use from the second-to-last to the last.
 237                 char *last_ff = strrchr(partial_input->str, '\f');
 238                 if (last_ff) {
 239                         *last_ff = '\0';
 240                         char *snd_last_ff = strrchr(partial_input->str, '\f');
 241                         if (snd_last_ff == NULL) snd_last_ff = partial_input->str;
 242                         input = g_string_new_len(snd_last_ff, last_ff - snd_last_ff);
 243                         g_string_erase(partial_input, 0, last_ff - partial_input->str + 1);
 244                 } else {
 245                         return TRUE;
 246                 }
 247         }
 248
 249         // remove beginning and trailing newlines, if any
 250         gssize cnt = 0;
 251         while ((input->len > cnt) && (input->str[cnt] == '\n')) {
 252                 cnt++;
 253         }
 254         g_string_erase(input, 0, cnt);
 255
 256         while ((input->len > 0) && (input->str[input->len - 1] == '\n')) {
 257                 g_string_truncate(input, input->len - 1);
 258         }
 259
 260         g_signal_handler_block (tb, text_change_handler);
 261         gtk_text_buffer_set_text (tb, input->str, input->len);
 262         g_signal_handler_unblock (tb, text_change_handler);
 263
 264         g_string_free(input, TRUE);
 265
 266         if (stat == G_IO_STATUS_AGAIN)
 267                 return TRUE;
 268         else
 269                 return FALSE;
 270 }
 271
 272 static void newtext() {
 273         if (quality_high_handler) {
 274                 g_source_remove(quality_high_handler);
 275                 quality_high_handler = 0;
 276         }
 277         hq(FALSE, TRUE);
 278 }
 279
 280 static void newtext_show_input() {
 281         show_entry();
 282 }
 283
 284 static void move_cursor(GtkTextView* tv, GtkMovementStep step, gint count, gboolean extend_selection, gpointer user_data) {
 285         show_entry();
 286 }
 287
 288 static struct option const long_options[] =
 289 {
 290         {"help",       no_argument,       NULL, 'h'},
 291         {"version",    no_argument,       NULL, 'V'},
 292         {"foreground", required_argument, NULL, 'f'},
 293         {"background", required_argument, NULL, 'b'},
 294         {"font",       required_argument, NULL, 'n'},
 295         {"rotate",     required_argument, NULL, 'r'},
 296         {"align",      required_argument, NULL, 'a'},
 297         {0,0,0,0}
 298 };
 299
 300 static void usage(char *cmd) {
 301         printf("Usage: %s [-h|--help] [-V|--version] [-f|--foreground=colordesc] [-b|--background=colordesc] [-n|--font=fontdesc] [-r|--rotate=0,1,2,3] [-a|--align=0,1,2]\n", cmd);
 302 }
 303
 304 static void version() {
 305         printf("%s\n", PACKAGE_STRING);
 306 }
 307
 308 int main(int argc, char **argv) {
 309         GString *input;
 310         int c;
 311         int input_provided = 0;
 312
 313         while ((c = getopt_long (argc, argv, "hVf:b:n:r:a:", long_options, (int *) 0)) != EOF) {
 314                 switch (c) {
 315                         case 'h':
 316                                 usage(argv[0]);
 317                                 return 0;
 318                                 break;
 319
 320                         case 'V':
 321                                 version();
 322                                 return 0;
 323                                 break;
 324
 325                         case 'f':
 326                                 foreground = optarg;
 327                                 break;
 328
 329                         case 'b':
 330                                 background = optarg;
 331                                 break;
 332
 333                         case 'n':
 334                                 fontdesc = optarg;
 335                                 break;
 336                         case 'r':
 337                                 rotation = atoi(optarg);
 338                                 break;
 339                         case 'a':
 340                                 alignment = atoi(optarg);
 341                                 break;
 342                         default:
 343                                 /* unknown switch received - at least
 344                                  * give usage but continue and use the
 345                                  * data */
 346                                 usage(argv[0]);
 347                                 break;
 348                 }
 349         }
 350
 351         gtk_init(&argc, &argv);
 352
 353         window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 354         gtk_window_set_decorated(GTK_WINDOW(window), FALSE);
 355         gtk_window_set_resizable(GTK_WINDOW(window), FALSE);
 356         gtk_window_set_icon_name (GTK_WINDOW (window), "sm");
 357
 358         GdkScreen *screen = gtk_window_get_screen(GTK_WINDOW(window));
 359         int w = gdk_screen_get_width(screen);
 360         int h = gdk_screen_get_height(screen);
 361
 362         GdkGeometry geometry;
 363         geometry.min_width = w;
 364         geometry.min_height = h;
 365         geometry.max_width = w;
 366         geometry.max_height = h;
 367         geometry.base_width = w;
 368         geometry.base_height = h;
 369         geometry.win_gravity = GDK_GRAVITY_STATIC;
 370         gtk_window_set_geometry_hints(GTK_WINDOW(window), window, &geometry,
 371                                       GDK_HINT_MIN_SIZE |
 372                                       GDK_HINT_MAX_SIZE |
 373                                       GDK_HINT_BASE_SIZE |
 374                                       GDK_HINT_WIN_GRAVITY |
 375                                       GDK_HINT_USER_POS);
 376         gtk_window_set_default_size(GTK_WINDOW(window), w, h);
 377         gtk_window_move(GTK_WINDOW(window), 0, 0);
 378
 379
 380         g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
 381
 382         settings = gtk_settings_get_default();
 383         GdkRGBA  white, black;
 384         if (foreground != NULL) {
 385                 gdk_rgba_parse(&black, foreground);
 386         } else {
 387                 gdk_rgba_parse(&black, "black");
 388         }
 389         if (background != NULL) {
 390                 gdk_rgba_parse(&white, background);
 391         } else {
 392                 gdk_rgba_parse(&white, "white");
 393         }
 394
 395         draw = gtk_drawing_area_new();
 396         gtk_widget_set_events(draw, GDK_BUTTON_PRESS_MASK|GDK_KEY_PRESS_MASK);
 397         gtk_widget_set_size_request(draw,400,400);
 398         gtk_widget_override_background_color(draw, GTK_STATE_NORMAL, &white);
 399         gtk_widget_override_color(draw, GTK_STATE_NORMAL, &black);
 400         g_signal_connect(G_OBJECT(draw), "button-press-event", G_CALLBACK(text_clicked), NULL);
 401         g_signal_connect(G_OBJECT(draw), "key-press-event", G_CALLBACK(text_keypress), NULL);
 402         gtk_widget_set_can_focus(draw, TRUE);
 403
 404         cursor = gdk_cursor_new_for_display(gtk_widget_get_display(GTK_WIDGET(draw)), GDK_BLANK_CURSOR);
 405
 406         tv = gtk_text_view_new();
 407         tb = gtk_text_view_get_buffer(GTK_TEXT_VIEW(tv));
 408
 409         partial_input = g_string_new("");
 410
 411         if (argc > optind)
 412                 if (!strcmp(argv[optind], "-") ) {
 413                         // read from stdin
 414                         GIOChannel *chan = g_io_channel_unix_new(0);
 415                         g_io_channel_set_flags(chan, G_IO_FLAG_NONBLOCK, NULL);
 416                         g_io_add_watch (chan, G_IO_IN | G_IO_HUP, &read_chan, NULL);
 417
 418                         input = g_string_new("");
 419                         input_provided++;
 420                 } else {
 421                         int i;
 422
 423                         input = g_string_new("");
 424
 425                         for (i = optind; i < argc; i++) {
 426                                 g_string_append(input, argv[i]);
 427
 428                                 if (i < argc - 1) {
 429                                         g_string_append(input, " ");
 430                                 }
 431                         }
 432                         input_provided++;
 433                 }
 434         else
 435                 input = g_string_new(":-)");
 436
 437         gtk_text_buffer_set_text(tb, input->str, input->len);
 438         g_string_free(input, TRUE);
 439         GtkTextIter start, end;
 440         gtk_text_buffer_get_bounds(tb, &start, &end);
 441         gtk_text_buffer_select_range(tb, &start, &end);
 442
 443         quit = gtk_button_new_from_stock(GTK_STOCK_QUIT);
 444         g_signal_connect(G_OBJECT(quit), "clicked", G_CALLBACK(gtk_main_quit), NULL);
 445
 446         GtkWidget *vbox_button = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
 447         gtk_box_pack_end(GTK_BOX(vbox_button), quit, FALSE, FALSE, 0);
 448
 449         GtkWidget *hbox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL,0);
 450         entry_widget = hbox;
 451         gtk_box_pack_start(GTK_BOX(hbox), tv,   TRUE,  TRUE,  0);
 452         gtk_box_pack_start(GTK_BOX(hbox), vbox_button, FALSE, FALSE, 0);
 453
 454         GtkWidget *vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL,0);
 455         gtk_box_pack_start(GTK_BOX(vbox), draw, TRUE, TRUE, 0);
 456         gtk_box_pack_end(GTK_BOX(vbox), hbox, FALSE, FALSE, 0);
 457
 458         gtk_container_add(GTK_CONTAINER(window), vbox);
 459
 460         font = pango_font_description_new();
 461         if (fontdesc != NULL) {
 462                 pango_font_description_set_family(font, fontdesc);
 463         } else {
 464                 pango_font_description_set_family(font, "sans-serif");
 465         }
 466         pango_font_description_set_size(font, 200*PANGO_SCALE);
 467
 468         GtkAccelGroup *accel = gtk_accel_group_new();
 469         guint key;
 470         GdkModifierType mod;
 471         gtk_accelerator_parse("<Ctrl>Q", &key, &mod);
 472         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(gtk_main_quit), NULL, NULL));
 473         gtk_accelerator_parse("Escape", &key, &mod);
 474         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(clear_text), NULL, NULL));
 475         gtk_window_add_accel_group(GTK_WINDOW(window), accel);
 476         gtk_widget_show_all(window);
 477
 478         g_signal_connect_after(G_OBJECT(draw), "draw", G_CALLBACK(redraw), NULL);
 479         text_change_handler = g_signal_connect(G_OBJECT(tb), "changed", G_CALLBACK(newtext_show_input), NULL);
 480         g_signal_connect(G_OBJECT(tb), "changed", G_CALLBACK(newtext), NULL);
 481         g_signal_connect(G_OBJECT(tv), "move-cursor", G_CALLBACK(move_cursor), NULL);
 482
 483         if (!input_provided)
 484                 show_entry();
 485         else
 486                 hide_entry(NULL);
 487
 488         gtk_main();
 489
 490         return 0;
 491 }