sm.c

   1 /*
   2 #     vlshow.c
   3 #     Copyright (C) 2006 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 <math.h>
  31
  32 #include "config.h"
  33
  34 #ifndef _GNU_SOURCE
  35 #define _GNU_SOURCE                             /* for getopt_long */
  36 #endif
  37 #include <getopt.h>
  38
  39 #define min(x,y) ((x) < (y) ? (x) : (y))
  40
  41 #define AUTOHIDE_TIMEOUT 3
  42
  43 static gboolean quality = TRUE;
  44 static gboolean need_resize = 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 rotation = 0; // 0 = normal, 1 = left, 2 = inverted, 3 = right
  62
  63 gboolean hide_entry(gpointer *user_data) {
  64         gtk_widget_hide(entry_widget);
  65         gtk_widget_grab_focus(draw);
  66         gtk_widget_queue_draw(draw);
  67         gdk_window_set_cursor(GTK_WIDGET(draw)->window, cursor);
  68         return FALSE;
  69 }
  70
  71 static void show_entry() {
  72         if (timeout_id) {
  73                 g_source_remove(timeout_id);
  74                 timeout_id = 0;
  75         }
  76         gtk_widget_show(entry_widget);
  77         gtk_widget_grab_focus(tv);
  78         gdk_window_set_cursor(GTK_WIDGET(draw)->window, NULL);
  79
  80         timeout_id = g_timeout_add_seconds (AUTOHIDE_TIMEOUT, (GSourceFunc)hide_entry, NULL);
  81 }
  82
  83 static void clear_text(GtkAccelGroup *accel, GObject *window, guint keyval,  GdkModifierType modifier) {
  84         if( gtk_text_buffer_get_char_count(tb) ) {
  85                 gtk_text_buffer_set_text(tb,"",-1);
  86                 show_entry();
  87         } else {
  88                 gtk_main_quit();
  89         }
  90 }
  91
  92 static char *get_text() {
  93         GtkTextIter start, end;
  94         gtk_text_buffer_get_start_iter(tb,&start);
  95         gtk_text_buffer_get_end_iter(tb,&end);
  96         return gtk_text_buffer_get_text(tb, &start, &end, FALSE);
  97 }
  98
  99 static void hq(gboolean q, gboolean force){
 100         if (q != quality)
 101                 if (q)
 102                         gtk_settings_set_long_property(settings,"gtk-xft-antialias",1,"Hier halt");
 103                 else
 104                         gtk_settings_set_long_property(settings,"gtk-xft-antialias",0,"Hier halt");
 105         else
 106                 if (force)
 107                         gtk_widget_queue_draw(draw);
 108
 109         quality = q;
 110 }
 111
 112 static void redraw() {
 113         const char *text = pango_layout_get_text(layout);
 114         if (strlen(text) > 0) {
 115                 GdkGC *gc = gtk_widget_get_style(draw)->fg_gc[GTK_STATE_NORMAL];
 116                 int w1, h1;
 117                 pango_layout_get_pixel_size(layout, &w1, &h1);
 118                 if (w1>0 && h1>0) {
 119                         int w2 = window->allocation.width;
 120                         int h2 = window->allocation.height;
 121
 122                         int rw1, rh1;
 123                         if (rotation == 0 || rotation == 2) {
 124                                 rw1 = w1;
 125                                 rh1 = h1;
 126                         } else {
 127                                 rw1 = h1;
 128                                 rh1 = w1;
 129                         }
 130
 131                         double s = min ((double)w2/rw1, (double)h2/rh1);
 132
 133
 134                         PangoMatrix matrix = PANGO_MATRIX_INIT;
 135                         // Move matrix to the screen center
 136                         pango_matrix_translate(&matrix, w2/2, h2/2);
 137                         // Scale as required
 138                         pango_matrix_scale(&matrix, s, s);
 139                         // Rotate if needed
 140                         pango_matrix_rotate (&matrix, rotation * 90);
 141                         // Move matrix so that text will be centered
 142                         //pango_matrix_translate(&matrix, -w1/2, -h1/2);
 143
 144                         // Apply matrix
 145                         PangoContext *context =  pango_layout_get_context(layout);
 146                         pango_context_set_matrix (context, &matrix);
 147                         pango_layout_context_changed (layout);
 148
 149                         gdk_draw_layout(draw->window, gc,
 150                                 (w2-(s*rw1))/2, (h2-(s*rh1))/2,layout);
 151
 152                         // Reset matrix
 153                         PangoMatrix matrix2 = PANGO_MATRIX_INIT;
 154                         pango_context_set_matrix (context, &matrix2);
 155                         pango_layout_context_changed (layout);
 156
 157                         hq(TRUE, FALSE);
 158                 }
 159         }
 160 }
 161
 162 static gboolean text_keypress(GtkWidget *widget, GdkEventButton *event, gpointer *user_data) {
 163         // forward signal to the text view
 164         gboolean ret;
 165         g_signal_emit_by_name(tv, "key-press-event", event, &ret);
 166         gtk_widget_grab_focus(tv);
 167         return ret;
 168 }
 169
 170 static gboolean text_clicked(GtkWidget *widget, GdkEventButton *event, gpointer *user_data) {
 171         show_entry();
 172         if (event->type == GDK_BUTTON_PRESS && event->button == 2) {
 173                 GtkClipboard *cb = gtk_clipboard_get(GDK_SELECTION_PRIMARY);
 174
 175                 gchar *txt = gtk_clipboard_wait_for_text(cb);
 176                 if (txt != NULL) {
 177                         gtk_text_buffer_set_text(tb,txt,-1);
 178                         g_free(txt);
 179                 }
 180
 181         }
 182         return FALSE;
 183 }
 184
 185 static void newtext() {
 186         show_entry();
 187         pango_layout_set_text(layout, get_text(), -1);
 188         hq(FALSE, TRUE);
 189 }
 190
 191 static void move_cursor(GtkTextView* tv, GtkMovementStep step, gint count, gboolean extend_selection, gpointer user_data) {
 192         show_entry();
 193 }
 194
 195 static struct option const long_options[] =
 196 {
 197         {"help",       no_argument,       NULL, 'h'},
 198         {"version",    no_argument,       NULL, 'V'},
 199         {"foreground", required_argument, NULL, 'f'},
 200         {"background", required_argument, NULL, 'b'},
 201         {"font",       required_argument, NULL, 'n'},
 202         {"rotate",     required_argument, NULL, 'r'},
 203         {0,0,0,0}
 204 };
 205
 206 static void usage(char *cmd) {
 207         printf("Usage: %s [-h|--help] [-V|--version] [-f|--foreground=colordesc] [-b|--background=colordesc] [-n|--font=fontdesc] [-r|--rotate=0,1,2,3]\n", cmd);
 208 }
 209
 210 static void version() {
 211         printf("%s\n", PACKAGE_STRING);
 212 }
 213
 214 int main(int argc, char **argv) {
 215         GString *input;
 216         int c;
 217         int input_provided = 0;
 218
 219         while ((c = getopt_long (argc, argv, "hVf:b:n:r:", long_options, (int *) 0)) != EOF) {
 220                 switch (c) {
 221                         case 'h':
 222                                 usage(argv[0]);
 223                                 return 0;
 224                                 break;
 225
 226                         case 'V':
 227                                 version();
 228                                 return 0;
 229                                 break;
 230
 231                         case 'f':
 232                                 foreground = optarg;
 233                                 break;
 234
 235                         case 'b':
 236                                 background = optarg;
 237                                 break;
 238
 239                         case 'n':
 240                                 fontdesc = optarg;
 241                                 break;
 242                         case 'r':
 243                                 rotation = atoi(optarg);
 244                                 break;
 245                         default:
 246                                 /* unknown switch received - at least
 247                                  * give usage but continue and use the
 248                                  * data */
 249                                 usage(argv[0]);
 250                                 break;
 251                 }
 252         }
 253
 254         gtk_init(&argc, &argv);
 255
 256         window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 257         gtk_window_set_decorated(GTK_WINDOW(window), FALSE);
 258         gtk_window_set_resizable(GTK_WINDOW(window), FALSE);
 259         gtk_window_set_icon_name (GTK_WINDOW (window), "sm");
 260
 261         GdkScreen *screen = gtk_window_get_screen(GTK_WINDOW(window));
 262         int w = gdk_screen_get_width(screen);
 263         int h = gdk_screen_get_height(screen);
 264
 265         GdkGeometry geometry;
 266         geometry.min_width = w;
 267         geometry.min_height = h;
 268         geometry.max_width = w;
 269         geometry.max_height = h;
 270         geometry.base_width = w;
 271         geometry.base_height = h;
 272         geometry.win_gravity = GDK_GRAVITY_STATIC;
 273         gtk_window_set_geometry_hints(GTK_WINDOW(window), window, &geometry,
 274                                       GDK_HINT_MIN_SIZE |
 275                                       GDK_HINT_MAX_SIZE |
 276                                       GDK_HINT_BASE_SIZE |
 277                                       GDK_HINT_WIN_GRAVITY |
 278                                       GDK_HINT_USER_POS);
 279         gtk_window_set_default_size(GTK_WINDOW(window), w, h);
 280         gtk_window_move(GTK_WINDOW(window), 0, 0);
 281
 282
 283         g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
 284
 285         settings = gtk_settings_get_default();
 286         GdkColormap *colormap = gtk_widget_get_colormap(GTK_WIDGET(window));
 287         GdkColor white, black;
 288         gdk_colormap_alloc_color(colormap, &white, TRUE, TRUE);
 289         gdk_colormap_alloc_color(colormap, &black, TRUE, TRUE);
 290         if (foreground != NULL) {
 291                 gdk_color_parse(foreground, &black);
 292         } else {
 293                 gdk_color_parse("black", &black);
 294         }
 295         if (background != NULL) {
 296                 gdk_color_parse(background, &white);
 297         } else {
 298                 gdk_color_parse("white", &white);
 299         }
 300
 301         draw = gtk_drawing_area_new();
 302         gtk_widget_set_events(draw, GDK_BUTTON_PRESS_MASK|GDK_KEY_PRESS_MASK);
 303         gtk_widget_set_size_request(draw,400,400);
 304         gtk_widget_modify_bg(draw, GTK_STATE_NORMAL, &white);
 305         gtk_widget_modify_fg(draw, GTK_STATE_NORMAL, &black);
 306         g_signal_connect(G_OBJECT(draw), "button-press-event", G_CALLBACK(text_clicked), NULL);
 307         g_signal_connect(G_OBJECT(draw), "key-press-event", G_CALLBACK(text_keypress), NULL);
 308         gtk_widget_set_can_focus(draw, TRUE);
 309
 310         GdkPixmap *pixmap = gdk_pixmap_new(NULL, 1, 1, 1);
 311         GdkColor color;
 312         cursor = gdk_cursor_new_from_pixmap(pixmap, pixmap, &color, &color, 0, 0);
 313
 314         tv = gtk_text_view_new();
 315         tb = gtk_text_view_get_buffer(GTK_TEXT_VIEW(tv));
 316
 317         if (argc > optind)
 318                 if (!strcmp(argv[optind], "-") ) {
 319                         // read from stdin
 320                         gchar buf[1024];
 321                         int num;
 322
 323                         input = g_string_new("");
 324
 325                         while ((num = fread (buf, 1, sizeof(buf), stdin)) > 0) {
 326                                 g_string_append_len(input, buf, num);
 327                         }
 328
 329                         // remove trailing newline, if any
 330                         if ((input->len > 0) && (input->str[input->len - 1] == '\n')) {
 331                                 g_string_truncate(input, input->len - 1);
 332                         }
 333                         input_provided++;
 334                 } else {
 335                         int i;
 336
 337                         input = g_string_new("");
 338
 339                         for (i = optind; i < argc; i++) {
 340                                 g_string_append(input, argv[i]);
 341
 342                                 if (i < argc - 1) {
 343                                         g_string_append(input, " ");
 344                                 }
 345                         }
 346                         input_provided++;
 347                 }
 348         else
 349                 input = g_string_new(":-)");
 350
 351         gtk_text_buffer_set_text(tb, input->str, input->len);
 352         g_string_free(input, TRUE);
 353         GtkTextIter start, end;
 354         gtk_text_buffer_get_bounds(tb, &start, &end);
 355         gtk_text_buffer_select_range(tb, &start, &end);
 356
 357         quit = gtk_button_new_from_stock(GTK_STOCK_QUIT);
 358         g_signal_connect(G_OBJECT(quit), "clicked", G_CALLBACK(gtk_main_quit), NULL);
 359
 360         GtkWidget *vbox_button = gtk_vbox_new(FALSE, 0);
 361         gtk_box_pack_end(GTK_BOX(vbox_button), quit, FALSE, FALSE, 0);
 362
 363         GtkWidget *hbox = gtk_hbox_new(FALSE,0);
 364         entry_widget = hbox;
 365         gtk_box_pack_start(GTK_BOX(hbox), tv,   TRUE,  TRUE,  0);
 366         gtk_box_pack_start(GTK_BOX(hbox), vbox_button, FALSE, FALSE, 0);
 367
 368         GtkWidget *vbox = gtk_vbox_new(FALSE,0);
 369         gtk_box_pack_start(GTK_BOX(vbox), draw, TRUE, TRUE, 0);
 370         gtk_box_pack_end(GTK_BOX(vbox), hbox, FALSE, FALSE, 0);
 371
 372         gtk_container_add(GTK_CONTAINER(window), vbox);
 373
 374         font = pango_font_description_new();
 375         if (fontdesc != NULL) {
 376                 pango_font_description_set_family(font, fontdesc);
 377         } else {
 378                 pango_font_description_set_family(font, "sans-serif");
 379         }
 380         pango_font_description_set_size(font, 200*PANGO_SCALE);
 381
 382         layout = gtk_widget_create_pango_layout(window,get_text());
 383         pango_layout_set_font_description(layout, font);
 384         pango_layout_set_alignment(layout,PANGO_ALIGN_CENTER);
 385
 386         GtkAccelGroup *accel = gtk_accel_group_new();
 387         guint key;
 388         GdkModifierType mod;
 389         gtk_accelerator_parse("<Ctrl>Q", &key, &mod);
 390         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(gtk_main_quit), NULL, NULL));
 391         gtk_accelerator_parse("Escape", &key, &mod);
 392         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(clear_text), NULL, NULL));
 393         gtk_window_add_accel_group(GTK_WINDOW(window), accel);
 394         gtk_widget_show_all(window);
 395
 396         g_signal_connect_after(G_OBJECT(draw), "expose-event", G_CALLBACK(redraw), NULL);
 397         g_signal_connect(G_OBJECT(tb), "changed", G_CALLBACK(newtext), NULL);
 398         g_signal_connect(G_OBJECT(tv), "move-cursor", G_CALLBACK(move_cursor), NULL);
 399
 400         if (!input_provided)
 401                 show_entry();
 402         else
 403                 hide_entry(NULL);
 404
 405         gtk_main();
 406
 407         return 0;
 408 }