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 int alignment = 0; // 0 = centered, 1 = left-aligned, 2 = right-aligned
  63 static GString *partial_input;
  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(draw)->window, 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(draw)->window, 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         else
 109                 if (force)
 110                         gtk_widget_queue_draw(draw);
 111
 112         quality = q;
 113 }
 114
 115 static void redraw() {
 116         const char *text = pango_layout_get_text(layout);
 117         if (strlen(text) > 0) {
 118                 GdkGC *gc = gtk_widget_get_style(draw)->fg_gc[GTK_STATE_NORMAL];
 119                 int w1, h1;
 120                 pango_layout_get_pixel_size(layout, &w1, &h1);
 121                 if (w1>0 && h1>0) {
 122                         int w2 = window->allocation.width;
 123                         int h2 = window->allocation.height;
 124
 125                         int rw1, rh1;
 126                         if (rotation == 0 || rotation == 2) {
 127                                 rw1 = w1;
 128                                 rh1 = h1;
 129                         } else {
 130                                 rw1 = h1;
 131                                 rh1 = w1;
 132                         }
 133
 134                         double s = min ((double)w2/rw1, (double)h2/rh1);
 135
 136
 137                         PangoMatrix matrix = PANGO_MATRIX_INIT;
 138                         // Move matrix to the screen center
 139                         pango_matrix_translate(&matrix, w2/2, h2/2);
 140                         // Scale as required
 141                         pango_matrix_scale(&matrix, s, s);
 142                         // Rotate if needed
 143                         pango_matrix_rotate (&matrix, rotation * 90);
 144                         // Move matrix so that text will be centered
 145                         //pango_matrix_translate(&matrix, -w1/2, -h1/2);
 146
 147                         // Apply matrix
 148                         PangoContext *context =  pango_layout_get_context(layout);
 149                         pango_context_set_matrix (context, &matrix);
 150                         pango_layout_context_changed (layout);
 151
 152                         gdk_draw_layout(draw->window, gc,
 153                                 (w2-(s*rw1))/2, (h2-(s*rh1))/2,layout);
 154
 155                         // Reset matrix
 156                         PangoMatrix matrix2 = PANGO_MATRIX_INIT;
 157                         pango_context_set_matrix (context, &matrix2);
 158                         pango_layout_context_changed (layout);
 159
 160                         hq(TRUE, FALSE);
 161                 }
 162         }
 163 }
 164
 165 static gboolean text_keypress(GtkWidget *widget, GdkEventButton *event, gpointer *user_data) {
 166         // forward signal to the text view
 167         gboolean ret;
 168         g_signal_emit_by_name(tv, "key-press-event", event, &ret);
 169         gtk_widget_grab_focus(tv);
 170         return ret;
 171 }
 172
 173 static gboolean text_clicked(GtkWidget *widget, GdkEventButton *event, gpointer *user_data) {
 174         show_entry();
 175         if (event->type == GDK_BUTTON_PRESS && event->button == 2) {
 176                 GtkClipboard *cb = gtk_clipboard_get(GDK_SELECTION_PRIMARY);
 177
 178                 gchar *txt = gtk_clipboard_wait_for_text(cb);
 179                 if (txt != NULL) {
 180                         gtk_text_buffer_set_text(tb,txt,-1);
 181                         g_free(txt);
 182                 }
 183
 184         }
 185         return FALSE;
 186 }
 187
 188 static gboolean read_chan(GIOChannel *chan, GIOCondition condition, gpointer data){
 189         gchar buf[1024];
 190         GString *input;
 191         GIOStatus stat = G_IO_STATUS_NORMAL;
 192         gsize read;
 193         GError *err = NULL;
 194
 195         while ((stat = g_io_channel_read_chars(chan, buf, sizeof(buf), &read, &err)) == G_IO_STATUS_NORMAL && err == NULL) {
 196                 g_string_append_len(partial_input, buf, read);
 197         }
 198
 199         if (err != NULL)
 200         {
 201             fprintf (stderr, "Unable to read stdin: %s\n", err->message);
 202             g_error_free (err);
 203             return TRUE;
 204         }
 205
 206
 207         if (stat == G_IO_STATUS_EOF) {
 208                 // There is an end of file, so use the whole input
 209                 input = g_string_new_len(partial_input->str, partial_input->len);
 210                 g_string_truncate(partial_input, 0);
 211         } else {
 212                 // There is no end of file. Check for form feed characters.
 213                 // Use from the second-to-last to the last.
 214                 char *last_ff = strrchr(partial_input->str, '\f');
 215                 if (last_ff) {
 216                         *last_ff = '\0';
 217                         char *snd_last_ff = strrchr(partial_input->str, '\f');
 218                         if (snd_last_ff == NULL) snd_last_ff = partial_input->str;
 219                         input = g_string_new_len(snd_last_ff, last_ff - snd_last_ff);
 220                         g_string_erase(partial_input, 0, last_ff - partial_input->str + 1);
 221                 } else {
 222                         return TRUE;
 223                 }
 224         }
 225
 226         // remove beginning and trailing newlines, if any
 227         gssize cnt = 0;
 228         while ((input->len > cnt) && (input->str[cnt] == '\n')) {
 229                 cnt++;
 230         }
 231         g_string_erase(input, 0, cnt);
 232
 233         while ((input->len > 0) && (input->str[input->len - 1] == '\n')) {
 234                 g_string_truncate(input, input->len - 1);
 235         }
 236
 237         g_signal_handler_block (tb, text_change_handler);
 238         gtk_text_buffer_set_text (tb, input->str, input->len);
 239         g_signal_handler_unblock (tb, text_change_handler);
 240
 241         g_string_free(input, TRUE);
 242
 243         if (stat == G_IO_STATUS_AGAIN)
 244                 return TRUE;
 245         else
 246                 return FALSE;
 247 }
 248
 249 static void newtext() {
 250         pango_layout_set_text(layout, get_text(), -1);
 251         hq(FALSE, TRUE);
 252 }
 253
 254 static void newtext_show_input() {
 255         show_entry();
 256 }
 257
 258 static void move_cursor(GtkTextView* tv, GtkMovementStep step, gint count, gboolean extend_selection, gpointer user_data) {
 259         show_entry();
 260 }
 261
 262 static struct option const long_options[] =
 263 {
 264         {"help",       no_argument,       NULL, 'h'},
 265         {"version",    no_argument,       NULL, 'V'},
 266         {"foreground", required_argument, NULL, 'f'},
 267         {"background", required_argument, NULL, 'b'},
 268         {"font",       required_argument, NULL, 'n'},
 269         {"rotate",     required_argument, NULL, 'r'},
 270         {"align",      required_argument, NULL, 'a'},
 271         {0,0,0,0}
 272 };
 273
 274 static void usage(char *cmd) {
 275         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);
 276 }
 277
 278 static void version() {
 279         printf("%s\n", PACKAGE_STRING);
 280 }
 281
 282 int main(int argc, char **argv) {
 283         GString *input;
 284         int c;
 285         int input_provided = 0;
 286
 287         while ((c = getopt_long (argc, argv, "hVf:b:n:r:a:", long_options, (int *) 0)) != EOF) {
 288                 switch (c) {
 289                         case 'h':
 290                                 usage(argv[0]);
 291                                 return 0;
 292                                 break;
 293
 294                         case 'V':
 295                                 version();
 296                                 return 0;
 297                                 break;
 298
 299                         case 'f':
 300                                 foreground = optarg;
 301                                 break;
 302
 303                         case 'b':
 304                                 background = optarg;
 305                                 break;
 306
 307                         case 'n':
 308                                 fontdesc = optarg;
 309                                 break;
 310                         case 'r':
 311                                 rotation = atoi(optarg);
 312                                 break;
 313                         case 'a':
 314                                 alignment = atoi(optarg);
 315                                 break;
 316                         default:
 317                                 /* unknown switch received - at least
 318                                  * give usage but continue and use the
 319                                  * data */
 320                                 usage(argv[0]);
 321                                 break;
 322                 }
 323         }
 324
 325         gtk_init(&argc, &argv);
 326
 327         window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 328         gtk_window_set_decorated(GTK_WINDOW(window), FALSE);
 329         gtk_window_set_resizable(GTK_WINDOW(window), FALSE);
 330         gtk_window_set_icon_name (GTK_WINDOW (window), "sm");
 331
 332         GdkScreen *screen = gtk_window_get_screen(GTK_WINDOW(window));
 333         int w = gdk_screen_get_width(screen);
 334         int h = gdk_screen_get_height(screen);
 335
 336         GdkGeometry geometry;
 337         geometry.min_width = w;
 338         geometry.min_height = h;
 339         geometry.max_width = w;
 340         geometry.max_height = h;
 341         geometry.base_width = w;
 342         geometry.base_height = h;
 343         geometry.win_gravity = GDK_GRAVITY_STATIC;
 344         gtk_window_set_geometry_hints(GTK_WINDOW(window), window, &geometry,
 345                                       GDK_HINT_MIN_SIZE |
 346                                       GDK_HINT_MAX_SIZE |
 347                                       GDK_HINT_BASE_SIZE |
 348                                       GDK_HINT_WIN_GRAVITY |
 349                                       GDK_HINT_USER_POS);
 350         gtk_window_set_default_size(GTK_WINDOW(window), w, h);
 351         gtk_window_move(GTK_WINDOW(window), 0, 0);
 352
 353
 354         g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
 355
 356         settings = gtk_settings_get_default();
 357         GdkColormap *colormap = gtk_widget_get_colormap(GTK_WIDGET(window));
 358         GdkColor white, black;
 359         gdk_colormap_alloc_color(colormap, &white, TRUE, TRUE);
 360         gdk_colormap_alloc_color(colormap, &black, TRUE, TRUE);
 361         if (foreground != NULL) {
 362                 gdk_color_parse(foreground, &black);
 363         } else {
 364                 gdk_color_parse("black", &black);
 365         }
 366         if (background != NULL) {
 367                 gdk_color_parse(background, &white);
 368         } else {
 369                 gdk_color_parse("white", &white);
 370         }
 371
 372         draw = gtk_drawing_area_new();
 373         gtk_widget_set_events(draw, GDK_BUTTON_PRESS_MASK|GDK_KEY_PRESS_MASK);
 374         gtk_widget_set_size_request(draw,400,400);
 375         gtk_widget_modify_bg(draw, GTK_STATE_NORMAL, &white);
 376         gtk_widget_modify_fg(draw, GTK_STATE_NORMAL, &black);
 377         g_signal_connect(G_OBJECT(draw), "button-press-event", G_CALLBACK(text_clicked), NULL);
 378         g_signal_connect(G_OBJECT(draw), "key-press-event", G_CALLBACK(text_keypress), NULL);
 379         gtk_widget_set_can_focus(draw, TRUE);
 380
 381         GdkPixmap *pixmap = gdk_pixmap_new(NULL, 1, 1, 1);
 382         GdkColor color;
 383         cursor = gdk_cursor_new_from_pixmap(pixmap, pixmap, &color, &color, 0, 0);
 384
 385         tv = gtk_text_view_new();
 386         tb = gtk_text_view_get_buffer(GTK_TEXT_VIEW(tv));
 387
 388         partial_input = g_string_new("");
 389
 390         if (argc > optind)
 391                 if (!strcmp(argv[optind], "-") ) {
 392                         // read from stdin
 393                         GIOChannel *chan = g_io_channel_unix_new(0);
 394                         g_io_channel_set_flags(chan, G_IO_FLAG_NONBLOCK, NULL);
 395                         g_io_add_watch (chan, G_IO_IN | G_IO_HUP, &read_chan, NULL);
 396
 397                         input = g_string_new("");
 398                         input_provided++;
 399                 } else {
 400                         int i;
 401
 402                         input = g_string_new("");
 403
 404                         for (i = optind; i < argc; i++) {
 405                                 g_string_append(input, argv[i]);
 406
 407                                 if (i < argc - 1) {
 408                                         g_string_append(input, " ");
 409                                 }
 410                         }
 411                         input_provided++;
 412                 }
 413         else
 414                 input = g_string_new(":-)");
 415
 416         gtk_text_buffer_set_text(tb, input->str, input->len);
 417         g_string_free(input, TRUE);
 418         GtkTextIter start, end;
 419         gtk_text_buffer_get_bounds(tb, &start, &end);
 420         gtk_text_buffer_select_range(tb, &start, &end);
 421
 422         quit = gtk_button_new_from_stock(GTK_STOCK_QUIT);
 423         g_signal_connect(G_OBJECT(quit), "clicked", G_CALLBACK(gtk_main_quit), NULL);
 424
 425         GtkWidget *vbox_button = gtk_vbox_new(FALSE, 0);
 426         gtk_box_pack_end(GTK_BOX(vbox_button), quit, FALSE, FALSE, 0);
 427
 428         GtkWidget *hbox = gtk_hbox_new(FALSE,0);
 429         entry_widget = hbox;
 430         gtk_box_pack_start(GTK_BOX(hbox), tv,   TRUE,  TRUE,  0);
 431         gtk_box_pack_start(GTK_BOX(hbox), vbox_button, FALSE, FALSE, 0);
 432
 433         GtkWidget *vbox = gtk_vbox_new(FALSE,0);
 434         gtk_box_pack_start(GTK_BOX(vbox), draw, TRUE, TRUE, 0);
 435         gtk_box_pack_end(GTK_BOX(vbox), hbox, FALSE, FALSE, 0);
 436
 437         gtk_container_add(GTK_CONTAINER(window), vbox);
 438
 439         font = pango_font_description_new();
 440         if (fontdesc != NULL) {
 441                 pango_font_description_set_family(font, fontdesc);
 442         } else {
 443                 pango_font_description_set_family(font, "sans-serif");
 444         }
 445         pango_font_description_set_size(font, 200*PANGO_SCALE);
 446
 447         layout = gtk_widget_create_pango_layout(window,get_text());
 448         pango_layout_set_font_description(layout, font);
 449
 450         switch(alignment){
 451                 case 0: // center
 452                         pango_layout_set_alignment(layout,PANGO_ALIGN_CENTER);
 453                         break;
 454                 case 1: // left
 455                         pango_layout_set_alignment(layout,PANGO_ALIGN_LEFT);
 456                         break;
 457                 case 2: // left
 458                         pango_layout_set_alignment(layout,PANGO_ALIGN_RIGHT);
 459                         break;
 460                 default:
 461                         // we propably don't want to annoy the user, so default to
 462                         // the old default-behaviour:
 463                         pango_layout_set_alignment(layout,PANGO_ALIGN_CENTER);
 464         }
 465
 466         GtkAccelGroup *accel = gtk_accel_group_new();
 467         guint key;
 468         GdkModifierType mod;
 469         gtk_accelerator_parse("<Ctrl>Q", &key, &mod);
 470         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(gtk_main_quit), NULL, NULL));
 471         gtk_accelerator_parse("Escape", &key, &mod);
 472         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(clear_text), NULL, NULL));
 473         gtk_window_add_accel_group(GTK_WINDOW(window), accel);
 474         gtk_widget_show_all(window);
 475
 476         g_signal_connect_after(G_OBJECT(draw), "expose-event", G_CALLBACK(redraw), NULL);
 477         text_change_handler = g_signal_connect(G_OBJECT(tb), "changed", G_CALLBACK(newtext_show_input), NULL);
 478         g_signal_connect(G_OBJECT(tb), "changed", G_CALLBACK(newtext), NULL);
 479         g_signal_connect(G_OBJECT(tv), "move-cursor", G_CALLBACK(move_cursor), NULL);
 480
 481         if (!input_provided)
 482                 show_entry();
 483         else
 484                 hide_entry(NULL);
 485
 486         gtk_main();
 487
 488         return 0;
 489 }