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                 pango_layout_set_alignment(layout,PANGO_ALIGN_CENTER);
 132
 133                 pango_layout_get_pixel_size(layout, &w1, &h1);
 134                 if (w1>0 && h1>0) {
 135                         int w2 = gtk_widget_get_allocated_width(draw);
 136                         int h2 = gtk_widget_get_allocated_height(draw);
 137
 138                         int rw1, rh1;
 139                         if (rotation == 0 || rotation == 2) {
 140                                 rw1 = w1;
 141                                 rh1 = h1;
 142                         } else {
 143                                 rw1 = h1;
 144                                 rh1 = w1;
 145                         }
 146
 147                         double s = min ((double)w2/rw1, (double)h2/rh1);
 148
 149                         cairo_save(cr);
 150
 151                         GdkRGBA color;
 152                         gtk_style_context_get_color (gtk_widget_get_style_context(draw),
 153                                 GTK_STATE_NORMAL, &color);
 154                         gdk_cairo_set_source_rgba(cr, &color);
 155
 156
 157                         cairo_translate(cr, w2/2, h2/2);
 158                         cairo_rotate(cr, rotation * M_PI_2);
 159                         cairo_scale(cr, s, s);
 160                         cairo_translate(cr, -w1/2, -h1/2);
 161                         pango_cairo_show_layout (cr, layout);
 162
 163                         cairo_restore(cr);
 164
 165                         if (quality_high_handler)
 166                                 g_source_remove(quality_high_handler);
 167                         quality_high_handler = g_timeout_add(0, quality_high, NULL);
 168                 }
 169                 g_object_unref(layout);
 170         }
 171 }
 172
 173 static gboolean text_keypress(GtkWidget *widget, GdkEventButton *event, gpointer *user_data) {
 174         // forward signal to the text view
 175         gboolean ret;
 176         g_signal_emit_by_name(tv, "key-press-event", event, &ret);
 177         gtk_widget_grab_focus(tv);
 178         return ret;
 179 }
 180
 181 static gboolean text_clicked(GtkWidget *widget, GdkEventButton *event, gpointer *user_data) {
 182         show_entry();
 183         if (event->type == GDK_BUTTON_PRESS && event->button == 2) {
 184                 GtkClipboard *cb = gtk_clipboard_get(GDK_SELECTION_PRIMARY);
 185
 186                 gchar *txt = gtk_clipboard_wait_for_text(cb);
 187                 if (txt != NULL) {
 188                         gtk_text_buffer_set_text(tb,txt,-1);
 189                         g_free(txt);
 190                 }
 191
 192         }
 193         return FALSE;
 194 }
 195
 196 static gboolean read_chan(GIOChannel *chan, GIOCondition condition, gpointer data){
 197         gchar buf[1024];
 198         GString *input;
 199         GIOStatus stat = G_IO_STATUS_NORMAL;
 200         gsize read;
 201         GError *err = NULL;
 202
 203         while ((stat = g_io_channel_read_chars(chan, buf, sizeof(buf), &read, &err)) == G_IO_STATUS_NORMAL && err == NULL) {
 204                 g_string_append_len(partial_input, buf, read);
 205         }
 206
 207         if (err != NULL)
 208         {
 209             fprintf (stderr, "Unable to read stdin: %s\n", err->message);
 210             g_error_free (err);
 211             return TRUE;
 212         }
 213
 214
 215         if (stat == G_IO_STATUS_EOF) {
 216                 // There is an end of file, so use the whole input
 217                 input = g_string_new_len(partial_input->str, partial_input->len);
 218                 g_string_truncate(partial_input, 0);
 219         } else {
 220                 // There is no end of file. Check for form feed characters.
 221                 // Use from the second-to-last to the last.
 222                 char *last_ff = strrchr(partial_input->str, '\f');
 223                 if (last_ff) {
 224                         *last_ff = '\0';
 225                         char *snd_last_ff = strrchr(partial_input->str, '\f');
 226                         if (snd_last_ff == NULL) snd_last_ff = partial_input->str;
 227                         input = g_string_new_len(snd_last_ff, last_ff - snd_last_ff);
 228                         g_string_erase(partial_input, 0, last_ff - partial_input->str + 1);
 229                 } else {
 230                         return TRUE;
 231                 }
 232         }
 233
 234         // remove beginning and trailing newlines, if any
 235         gssize cnt = 0;
 236         while ((input->len > cnt) && (input->str[cnt] == '\n')) {
 237                 cnt++;
 238         }
 239         g_string_erase(input, 0, cnt);
 240
 241         while ((input->len > 0) && (input->str[input->len - 1] == '\n')) {
 242                 g_string_truncate(input, input->len - 1);
 243         }
 244
 245         g_signal_handler_block (tb, text_change_handler);
 246         gtk_text_buffer_set_text (tb, input->str, input->len);
 247         g_signal_handler_unblock (tb, text_change_handler);
 248
 249         g_string_free(input, TRUE);
 250
 251         if (stat == G_IO_STATUS_AGAIN)
 252                 return TRUE;
 253         else
 254                 return FALSE;
 255 }
 256
 257 static void newtext() {
 258         if (quality_high_handler) {
 259                 g_source_remove(quality_high_handler);
 260                 quality_high_handler = 0;
 261         }
 262         hq(FALSE, TRUE);
 263 }
 264
 265 static void newtext_show_input() {
 266         show_entry();
 267 }
 268
 269 static void move_cursor(GtkTextView* tv, GtkMovementStep step, gint count, gboolean extend_selection, gpointer user_data) {
 270         show_entry();
 271 }
 272
 273 static struct option const long_options[] =
 274 {
 275         {"help",       no_argument,       NULL, 'h'},
 276         {"version",    no_argument,       NULL, 'V'},
 277         {"foreground", required_argument, NULL, 'f'},
 278         {"background", required_argument, NULL, 'b'},
 279         {"font",       required_argument, NULL, 'n'},
 280         {"rotate",     required_argument, NULL, 'r'},
 281         {"align",      required_argument, NULL, 'a'},
 282         {0,0,0,0}
 283 };
 284
 285 static void usage(char *cmd) {
 286         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);
 287 }
 288
 289 static void version() {
 290         printf("%s\n", PACKAGE_STRING);
 291 }
 292
 293 int main(int argc, char **argv) {
 294         GString *input;
 295         int c;
 296         int input_provided = 0;
 297
 298         while ((c = getopt_long (argc, argv, "hVf:b:n:r:a:", long_options, (int *) 0)) != EOF) {
 299                 switch (c) {
 300                         case 'h':
 301                                 usage(argv[0]);
 302                                 return 0;
 303                                 break;
 304
 305                         case 'V':
 306                                 version();
 307                                 return 0;
 308                                 break;
 309
 310                         case 'f':
 311                                 foreground = optarg;
 312                                 break;
 313
 314                         case 'b':
 315                                 background = optarg;
 316                                 break;
 317
 318                         case 'n':
 319                                 fontdesc = optarg;
 320                                 break;
 321                         case 'r':
 322                                 rotation = atoi(optarg);
 323                                 break;
 324                         case 'a':
 325                                 alignment = atoi(optarg);
 326                                 break;
 327                         default:
 328                                 /* unknown switch received - at least
 329                                  * give usage but continue and use the
 330                                  * data */
 331                                 usage(argv[0]);
 332                                 break;
 333                 }
 334         }
 335
 336         gtk_init(&argc, &argv);
 337
 338         window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 339         gtk_window_set_decorated(GTK_WINDOW(window), FALSE);
 340         gtk_window_set_resizable(GTK_WINDOW(window), FALSE);
 341         gtk_window_set_icon_name (GTK_WINDOW (window), "sm");
 342
 343         GdkScreen *screen = gtk_window_get_screen(GTK_WINDOW(window));
 344         int w = gdk_screen_get_width(screen);
 345         int h = gdk_screen_get_height(screen);
 346
 347         GdkGeometry geometry;
 348         geometry.min_width = w;
 349         geometry.min_height = h;
 350         geometry.max_width = w;
 351         geometry.max_height = h;
 352         geometry.base_width = w;
 353         geometry.base_height = h;
 354         geometry.win_gravity = GDK_GRAVITY_STATIC;
 355         gtk_window_set_geometry_hints(GTK_WINDOW(window), window, &geometry,
 356                                       GDK_HINT_MIN_SIZE |
 357                                       GDK_HINT_MAX_SIZE |
 358                                       GDK_HINT_BASE_SIZE |
 359                                       GDK_HINT_WIN_GRAVITY |
 360                                       GDK_HINT_USER_POS);
 361         gtk_window_set_default_size(GTK_WINDOW(window), w, h);
 362         gtk_window_move(GTK_WINDOW(window), 0, 0);
 363
 364
 365         g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
 366
 367         settings = gtk_settings_get_default();
 368         GdkRGBA  white, black;
 369         if (foreground != NULL) {
 370                 gdk_rgba_parse(&black, foreground);
 371         } else {
 372                 gdk_rgba_parse(&black, "black");
 373         }
 374         if (background != NULL) {
 375                 gdk_rgba_parse(&white, background);
 376         } else {
 377                 gdk_rgba_parse(&white, "white");
 378         }
 379
 380         draw = gtk_drawing_area_new();
 381         gtk_widget_set_events(draw, GDK_BUTTON_PRESS_MASK|GDK_KEY_PRESS_MASK);
 382         gtk_widget_set_size_request(draw,400,400);
 383         gtk_widget_override_background_color(draw, GTK_STATE_NORMAL, &white);
 384         gtk_widget_override_color(draw, GTK_STATE_NORMAL, &black);
 385         g_signal_connect(G_OBJECT(draw), "button-press-event", G_CALLBACK(text_clicked), NULL);
 386         g_signal_connect(G_OBJECT(draw), "key-press-event", G_CALLBACK(text_keypress), NULL);
 387         gtk_widget_set_can_focus(draw, TRUE);
 388
 389         cursor = gdk_cursor_new_for_display(gtk_widget_get_display(GTK_WIDGET(draw)), GDK_BLANK_CURSOR);
 390
 391         tv = gtk_text_view_new();
 392         tb = gtk_text_view_get_buffer(GTK_TEXT_VIEW(tv));
 393
 394         partial_input = g_string_new("");
 395
 396         if (argc > optind)
 397                 if (!strcmp(argv[optind], "-") ) {
 398                         // read from stdin
 399                         GIOChannel *chan = g_io_channel_unix_new(0);
 400                         g_io_channel_set_flags(chan, G_IO_FLAG_NONBLOCK, NULL);
 401                         g_io_add_watch (chan, G_IO_IN | G_IO_HUP, &read_chan, NULL);
 402
 403                         input = g_string_new("");
 404                         input_provided++;
 405                 } else {
 406                         int i;
 407
 408                         input = g_string_new("");
 409
 410                         for (i = optind; i < argc; i++) {
 411                                 g_string_append(input, argv[i]);
 412
 413                                 if (i < argc - 1) {
 414                                         g_string_append(input, " ");
 415                                 }
 416                         }
 417                         input_provided++;
 418                 }
 419         else
 420                 input = g_string_new(":-)");
 421
 422         gtk_text_buffer_set_text(tb, input->str, input->len);
 423         g_string_free(input, TRUE);
 424         GtkTextIter start, end;
 425         gtk_text_buffer_get_bounds(tb, &start, &end);
 426         gtk_text_buffer_select_range(tb, &start, &end);
 427
 428         quit = gtk_button_new_from_stock(GTK_STOCK_QUIT);
 429         g_signal_connect(G_OBJECT(quit), "clicked", G_CALLBACK(gtk_main_quit), NULL);
 430
 431         GtkWidget *vbox_button = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);
 432         gtk_box_pack_end(GTK_BOX(vbox_button), quit, FALSE, FALSE, 0);
 433
 434         GtkWidget *hbox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL,0);
 435         entry_widget = hbox;
 436         gtk_box_pack_start(GTK_BOX(hbox), tv,   TRUE,  TRUE,  0);
 437         gtk_box_pack_start(GTK_BOX(hbox), vbox_button, FALSE, FALSE, 0);
 438
 439         GtkWidget *vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL,0);
 440         gtk_box_pack_start(GTK_BOX(vbox), draw, TRUE, TRUE, 0);
 441         gtk_box_pack_end(GTK_BOX(vbox), hbox, FALSE, FALSE, 0);
 442
 443         gtk_container_add(GTK_CONTAINER(window), vbox);
 444
 445         font = pango_font_description_new();
 446         if (fontdesc != NULL) {
 447                 pango_font_description_set_family(font, fontdesc);
 448         } else {
 449                 pango_font_description_set_family(font, "sans-serif");
 450         }
 451         pango_font_description_set_size(font, 200*PANGO_SCALE);
 452
 453         layout = gtk_widget_create_pango_layout(window,get_text());
 454         pango_layout_set_font_description(layout, font);
 455         pango_layout_set_alignment(layout,PANGO_ALIGN_CENTER);
 456
 457         GtkAccelGroup *accel = gtk_accel_group_new();
 458         guint key;
 459         GdkModifierType mod;
 460         gtk_accelerator_parse("<Ctrl>Q", &key, &mod);
 461         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(gtk_main_quit), NULL, NULL));
 462         gtk_accelerator_parse("Escape", &key, &mod);
 463         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(clear_text), NULL, NULL));
 464         gtk_window_add_accel_group(GTK_WINDOW(window), accel);
 465         gtk_widget_show_all(window);
 466
 467         g_signal_connect_after(G_OBJECT(draw), "draw", G_CALLBACK(redraw), NULL);
 468         text_change_handler = g_signal_connect(G_OBJECT(tb), "changed", G_CALLBACK(newtext_show_input), NULL);
 469         g_signal_connect(G_OBJECT(tb), "changed", G_CALLBACK(newtext), NULL);
 470         g_signal_connect(G_OBJECT(tv), "move-cursor", G_CALLBACK(move_cursor), NULL);
 471
 472         if (!input_provided)
 473                 show_entry();
 474         else
 475                 hide_entry(NULL);
 476
 477         gtk_main();
 478
 479         return 0;
 480 }