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 PangoLayout* layout;
  58 static char *foreground = NULL;
  59 static char *background = NULL;
  60 static char *fontdesc = NULL;
  61 static int rotation = 0; // 0 = normal, 1 = left, 2 = inverted, 3 = right
  62 static GString *partial_input;
  63 static gulong text_change_handler;
  64
  65 gboolean hide_entry(gpointer *user_data) {
  66         gtk_widget_hide(entry_widget);
  67         gtk_widget_grab_focus(draw);
  68         gtk_widget_queue_draw(draw);
  69         gdk_window_set_cursor(GTK_WIDGET(draw)->window, cursor);
  70         return FALSE;
  71 }
  72
  73 static void show_entry() {
  74         if (timeout_id) {
  75                 g_source_remove(timeout_id);
  76                 timeout_id = 0;
  77         }
  78         gtk_widget_show(entry_widget);
  79         gtk_widget_grab_focus(tv);
  80         gdk_window_set_cursor(GTK_WIDGET(draw)->window, NULL);
  81
  82         timeout_id = g_timeout_add_seconds (AUTOHIDE_TIMEOUT, (GSourceFunc)hide_entry, NULL);
  83 }
  84
  85 static void clear_text(GtkAccelGroup *accel, GObject *window, guint keyval,  GdkModifierType modifier) {
  86         if( gtk_text_buffer_get_char_count(tb) ) {
  87                 gtk_text_buffer_set_text(tb,"",-1);
  88                 show_entry();
  89         } else {
  90                 gtk_main_quit();
  91         }
  92 }
  93
  94 static char *get_text() {
  95         GtkTextIter start, end;
  96         gtk_text_buffer_get_start_iter(tb,&start);
  97         gtk_text_buffer_get_end_iter(tb,&end);
  98         return gtk_text_buffer_get_text(tb, &start, &end, FALSE);
  99 }
 100
 101 static void hq(gboolean q, gboolean force){
 102         if (q != quality)
 103                 if (q)
 104                         gtk_settings_set_long_property(settings,"gtk-xft-antialias",1,"Hier halt");
 105                 else
 106                         gtk_settings_set_long_property(settings,"gtk-xft-antialias",0,"Hier halt");
 107         else
 108                 if (force)
 109                         gtk_widget_queue_draw(draw);
 110
 111         quality = q;
 112 }
 113
 114 static void redraw() {
 115         const char *text = pango_layout_get_text(layout);
 116         if (strlen(text) > 0) {
 117                 GdkGC *gc = gtk_widget_get_style(draw)->fg_gc[GTK_STATE_NORMAL];
 118                 int w1, h1;
 119                 pango_layout_get_pixel_size(layout, &w1, &h1);
 120                 if (w1>0 && h1>0) {
 121                         int w2 = window->allocation.width;
 122                         int h2 = window->allocation.height;
 123
 124                         int rw1, rh1;
 125                         if (rotation == 0 || rotation == 2) {
 126                                 rw1 = w1;
 127                                 rh1 = h1;
 128                         } else {
 129                                 rw1 = h1;
 130                                 rh1 = w1;
 131                         }
 132
 133                         double s = min ((double)w2/rw1, (double)h2/rh1);
 134
 135
 136                         PangoMatrix matrix = PANGO_MATRIX_INIT;
 137                         // Move matrix to the screen center
 138                         pango_matrix_translate(&matrix, w2/2, h2/2);
 139                         // Scale as required
 140                         pango_matrix_scale(&matrix, s, s);
 141                         // Rotate if needed
 142                         pango_matrix_rotate (&matrix, rotation * 90);
 143                         // Move matrix so that text will be centered
 144                         //pango_matrix_translate(&matrix, -w1/2, -h1/2);
 145
 146                         // Apply matrix
 147                         PangoContext *context =  pango_layout_get_context(layout);
 148                         pango_context_set_matrix (context, &matrix);
 149                         pango_layout_context_changed (layout);
 150
 151                         gdk_draw_layout(draw->window, gc,
 152                                 (w2-(s*rw1))/2, (h2-(s*rh1))/2,layout);
 153
 154                         // Reset matrix
 155                         PangoMatrix matrix2 = PANGO_MATRIX_INIT;
 156                         pango_context_set_matrix (context, &matrix2);
 157                         pango_layout_context_changed (layout);
 158
 159                         hq(TRUE, FALSE);
 160                 }
 161         }
 162 }
 163
 164 static gboolean text_keypress(GtkWidget *widget, GdkEventButton *event, gpointer *user_data) {
 165         // forward signal to the text view
 166         gboolean ret;
 167         g_signal_emit_by_name(tv, "key-press-event", event, &ret);
 168         gtk_widget_grab_focus(tv);
 169         return ret;
 170 }
 171
 172 static gboolean text_clicked(GtkWidget *widget, GdkEventButton *event, gpointer *user_data) {
 173         show_entry();
 174         if (event->type == GDK_BUTTON_PRESS && event->button == 2) {
 175                 GtkClipboard *cb = gtk_clipboard_get(GDK_SELECTION_PRIMARY);
 176
 177                 gchar *txt = gtk_clipboard_wait_for_text(cb);
 178                 if (txt != NULL) {
 179                         gtk_text_buffer_set_text(tb,txt,-1);
 180                         g_free(txt);
 181                 }
 182
 183         }
 184         return FALSE;
 185 }
 186
 187 static gboolean read_chan(GIOChannel *chan, GIOCondition condition, gpointer data){
 188         gchar buf[1024];
 189         GString *input;
 190         GIOStatus stat = G_IO_STATUS_NORMAL;
 191         gsize read;
 192         GError *err = NULL;
 193
 194         while ((stat = g_io_channel_read_chars(chan, buf, sizeof(buf), &read, &err)) == G_IO_STATUS_NORMAL && err == NULL) {
 195                 g_string_append_len(partial_input, buf, read);
 196         }
 197
 198         if (err != NULL)
 199         {
 200             fprintf (stderr, "Unable to read stdin: %s\n", err->message);
 201             g_error_free (err);
 202             return TRUE;
 203         }
 204
 205
 206         if (stat == G_IO_STATUS_EOF) {
 207                 // There is an end of file, so use the whole input
 208                 input = g_string_new_len(partial_input->str, partial_input->len);
 209                 g_string_truncate(partial_input, 0);
 210         } else {
 211                 // There is no end of file. Check for form feed characters.
 212                 // Use from the second-to-last to the last.
 213                 char *last_ff = strrchr(partial_input->str, '\f');
 214                 if (last_ff) {
 215                         *last_ff = '\0';
 216                         char *snd_last_ff = strrchr(partial_input->str, '\f');
 217                         if (snd_last_ff == NULL) snd_last_ff = partial_input->str;
 218                         input = g_string_new_len(snd_last_ff, last_ff - snd_last_ff);
 219                         g_string_erase(partial_input, 0, last_ff - partial_input->str + 1);
 220                 } else {
 221                         return TRUE;
 222                 }
 223         }
 224
 225         // remove beginning and trailing newlines, if any
 226         gssize cnt = 0;
 227         while ((input->len > cnt) && (input->str[cnt] == '\n')) {
 228                 cnt++;
 229         }
 230         g_string_erase(input, 0, cnt);
 231
 232         while ((input->len > 0) && (input->str[input->len - 1] == '\n')) {
 233                 g_string_truncate(input, input->len - 1);
 234         }
 235
 236         g_signal_handler_block (tb, text_change_handler);
 237         gtk_text_buffer_set_text (tb, input->str, input->len);
 238         g_signal_handler_unblock (tb, text_change_handler);
 239
 240         g_string_free(input, TRUE);
 241
 242         if (stat == G_IO_STATUS_AGAIN)
 243                 return TRUE;
 244         else
 245                 return FALSE;
 246 }
 247
 248 static void newtext() {
 249         pango_layout_set_text(layout, get_text(), -1);
 250         hq(FALSE, TRUE);
 251 }
 252
 253 static void newtext_show_input() {
 254         show_entry();
 255 }
 256
 257 static void move_cursor(GtkTextView* tv, GtkMovementStep step, gint count, gboolean extend_selection, gpointer user_data) {
 258         show_entry();
 259 }
 260
 261 static struct option const long_options[] =
 262 {
 263         {"help",       no_argument,       NULL, 'h'},
 264         {"version",    no_argument,       NULL, 'V'},
 265         {"foreground", required_argument, NULL, 'f'},
 266         {"background", required_argument, NULL, 'b'},
 267         {"font",       required_argument, NULL, 'n'},
 268         {"rotate",     required_argument, NULL, 'r'},
 269         {0,0,0,0}
 270 };
 271
 272 static void usage(char *cmd) {
 273         printf("Usage: %s [-h|--help] [-V|--version] [-f|--foreground=colordesc] [-b|--background=colordesc] [-n|--font=fontdesc] [-r|--rotate=0,1,2,3]\n", cmd);
 274 }
 275
 276 static void version() {
 277         printf("%s\n", PACKAGE_STRING);
 278 }
 279
 280 int main(int argc, char **argv) {
 281         GString *input;
 282         int c;
 283         int input_provided = 0;
 284
 285         while ((c = getopt_long (argc, argv, "hVf:b:n:r:", long_options, (int *) 0)) != EOF) {
 286                 switch (c) {
 287                         case 'h':
 288                                 usage(argv[0]);
 289                                 return 0;
 290                                 break;
 291
 292                         case 'V':
 293                                 version();
 294                                 return 0;
 295                                 break;
 296
 297                         case 'f':
 298                                 foreground = optarg;
 299                                 break;
 300
 301                         case 'b':
 302                                 background = optarg;
 303                                 break;
 304
 305                         case 'n':
 306                                 fontdesc = optarg;
 307                                 break;
 308                         case 'r':
 309                                 rotation = atoi(optarg);
 310                                 break;
 311                         default:
 312                                 /* unknown switch received - at least
 313                                  * give usage but continue and use the
 314                                  * data */
 315                                 usage(argv[0]);
 316                                 break;
 317                 }
 318         }
 319
 320         gtk_init(&argc, &argv);
 321
 322         window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 323         gtk_window_set_decorated(GTK_WINDOW(window), FALSE);
 324         gtk_window_set_resizable(GTK_WINDOW(window), FALSE);
 325         gtk_window_set_icon_name (GTK_WINDOW (window), "sm");
 326
 327         GdkScreen *screen = gtk_window_get_screen(GTK_WINDOW(window));
 328         int w = gdk_screen_get_width(screen);
 329         int h = gdk_screen_get_height(screen);
 330
 331         GdkGeometry geometry;
 332         geometry.min_width = w;
 333         geometry.min_height = h;
 334         geometry.max_width = w;
 335         geometry.max_height = h;
 336         geometry.base_width = w;
 337         geometry.base_height = h;
 338         geometry.win_gravity = GDK_GRAVITY_STATIC;
 339         gtk_window_set_geometry_hints(GTK_WINDOW(window), window, &geometry,
 340                                       GDK_HINT_MIN_SIZE |
 341                                       GDK_HINT_MAX_SIZE |
 342                                       GDK_HINT_BASE_SIZE |
 343                                       GDK_HINT_WIN_GRAVITY |
 344                                       GDK_HINT_USER_POS);
 345         gtk_window_set_default_size(GTK_WINDOW(window), w, h);
 346         gtk_window_move(GTK_WINDOW(window), 0, 0);
 347
 348
 349         g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
 350
 351         settings = gtk_settings_get_default();
 352         GdkColormap *colormap = gtk_widget_get_colormap(GTK_WIDGET(window));
 353         GdkColor white, black;
 354         gdk_colormap_alloc_color(colormap, &white, TRUE, TRUE);
 355         gdk_colormap_alloc_color(colormap, &black, TRUE, TRUE);
 356         if (foreground != NULL) {
 357                 gdk_color_parse(foreground, &black);
 358         } else {
 359                 gdk_color_parse("black", &black);
 360         }
 361         if (background != NULL) {
 362                 gdk_color_parse(background, &white);
 363         } else {
 364                 gdk_color_parse("white", &white);
 365         }
 366
 367         draw = gtk_drawing_area_new();
 368         gtk_widget_set_events(draw, GDK_BUTTON_PRESS_MASK|GDK_KEY_PRESS_MASK);
 369         gtk_widget_set_size_request(draw,400,400);
 370         gtk_widget_modify_bg(draw, GTK_STATE_NORMAL, &white);
 371         gtk_widget_modify_fg(draw, GTK_STATE_NORMAL, &black);
 372         g_signal_connect(G_OBJECT(draw), "button-press-event", G_CALLBACK(text_clicked), NULL);
 373         g_signal_connect(G_OBJECT(draw), "key-press-event", G_CALLBACK(text_keypress), NULL);
 374         gtk_widget_set_can_focus(draw, TRUE);
 375
 376         GdkPixmap *pixmap = gdk_pixmap_new(NULL, 1, 1, 1);
 377         GdkColor color;
 378         cursor = gdk_cursor_new_from_pixmap(pixmap, pixmap, &color, &color, 0, 0);
 379
 380         tv = gtk_text_view_new();
 381         tb = gtk_text_view_get_buffer(GTK_TEXT_VIEW(tv));
 382
 383         partial_input = g_string_new("");
 384
 385         if (argc > optind)
 386                 if (!strcmp(argv[optind], "-") ) {
 387                         // read from stdin
 388                         GIOChannel *chan = g_io_channel_unix_new(0);
 389                         g_io_channel_set_flags(chan, G_IO_FLAG_NONBLOCK, NULL);
 390                         g_io_add_watch (chan, G_IO_IN | G_IO_HUP, &read_chan, NULL);
 391
 392                         input = g_string_new("");
 393                         input_provided++;
 394                 } else {
 395                         int i;
 396
 397                         input = g_string_new("");
 398
 399                         for (i = optind; i < argc; i++) {
 400                                 g_string_append(input, argv[i]);
 401
 402                                 if (i < argc - 1) {
 403                                         g_string_append(input, " ");
 404                                 }
 405                         }
 406                         input_provided++;
 407                 }
 408         else
 409                 input = g_string_new(":-)");
 410
 411         gtk_text_buffer_set_text(tb, input->str, input->len);
 412         g_string_free(input, TRUE);
 413         GtkTextIter start, end;
 414         gtk_text_buffer_get_bounds(tb, &start, &end);
 415         gtk_text_buffer_select_range(tb, &start, &end);
 416
 417         quit = gtk_button_new_from_stock(GTK_STOCK_QUIT);
 418         g_signal_connect(G_OBJECT(quit), "clicked", G_CALLBACK(gtk_main_quit), NULL);
 419
 420         GtkWidget *vbox_button = gtk_vbox_new(FALSE, 0);
 421         gtk_box_pack_end(GTK_BOX(vbox_button), quit, FALSE, FALSE, 0);
 422
 423         GtkWidget *hbox = gtk_hbox_new(FALSE,0);
 424         entry_widget = hbox;
 425         gtk_box_pack_start(GTK_BOX(hbox), tv,   TRUE,  TRUE,  0);
 426         gtk_box_pack_start(GTK_BOX(hbox), vbox_button, FALSE, FALSE, 0);
 427
 428         GtkWidget *vbox = gtk_vbox_new(FALSE,0);
 429         gtk_box_pack_start(GTK_BOX(vbox), draw, TRUE, TRUE, 0);
 430         gtk_box_pack_end(GTK_BOX(vbox), hbox, FALSE, FALSE, 0);
 431
 432         gtk_container_add(GTK_CONTAINER(window), vbox);
 433
 434         font = pango_font_description_new();
 435         if (fontdesc != NULL) {
 436                 pango_font_description_set_family(font, fontdesc);
 437         } else {
 438                 pango_font_description_set_family(font, "sans-serif");
 439         }
 440         pango_font_description_set_size(font, 200*PANGO_SCALE);
 441
 442         layout = gtk_widget_create_pango_layout(window,get_text());
 443         pango_layout_set_font_description(layout, font);
 444         pango_layout_set_alignment(layout,PANGO_ALIGN_CENTER);
 445
 446         GtkAccelGroup *accel = gtk_accel_group_new();
 447         guint key;
 448         GdkModifierType mod;
 449         gtk_accelerator_parse("<Ctrl>Q", &key, &mod);
 450         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(gtk_main_quit), NULL, NULL));
 451         gtk_accelerator_parse("Escape", &key, &mod);
 452         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(clear_text), NULL, NULL));
 453         gtk_window_add_accel_group(GTK_WINDOW(window), accel);
 454         gtk_widget_show_all(window);
 455
 456         g_signal_connect_after(G_OBJECT(draw), "expose-event", G_CALLBACK(redraw), NULL);
 457         text_change_handler = g_signal_connect(G_OBJECT(tb), "changed", G_CALLBACK(newtext_show_input), NULL);
 458         g_signal_connect(G_OBJECT(tb), "changed", G_CALLBACK(newtext), NULL);
 459         g_signal_connect(G_OBJECT(tv), "move-cursor", G_CALLBACK(move_cursor), NULL);
 460
 461         if (!input_provided)
 462                 show_entry();
 463         else
 464                 hide_entry(NULL);
 465
 466         gtk_main();
 467
 468         return 0;
 469 }