sm.c

   1 /*
   2 #     vlshow.c
   3 #     Copyright (C) 2006 Joachim Breitner
   4 #
   5 #     This program is free software; you can redistribute it and/or modify
   6 #     it under the terms of the GNU General Public License as published by
   7 #     the Free Software Foundation; either version 2 of the License, or
   8 #     (at your option) any later version.
   9 #
  10 #     This program is distributed in the hope that it will be useful,
  11 #     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 #     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 #     GNU General Public License for more details.
  14 #
  15 #     You should have received a copy of the GNU General Public License
  16 #     along with this program; if not, write to the Free Software
  17 #     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  18 */
  19
  20 #include <gtk/gtk.h>
  21 #include <gdk/gdk.h>
  22 #include <pango/pango.h>
  23 #include <string.h>
  24 #include <stdio.h>
  25 #include "config.h"
  26
  27 #ifndef _GNU_SOURCE
  28 #define _GNU_SOURCE                             /* for getopt_long */
  29 #endif
  30 #include <getopt.h>
  31
  32 static int min(int x, int y) {
  33         return x < y ? x : y;
  34 }
  35
  36
  37 static gboolean quality = TRUE;
  38 static gboolean need_resize = TRUE;
  39
  40 static GtkWidget* window;
  41 static GtkWidget* draw;
  42 static GdkCursor *cursor;
  43 static GtkWidget* quit;
  44 static GtkWidget* tv;
  45 static GtkSettings* settings;
  46 static GtkTextBuffer* tb;
  47 static PangoFontDescription *font;
  48 static PangoLayout* layout;
  49 static char *foreground = NULL;
  50 static char *background = NULL;
  51
  52 static void realize(GtkWindow *window, GdkScreen *screen, gpointer data) {
  53         gdk_window_set_cursor(draw->window, cursor);
  54 }
  55
  56 static void clear_text(GtkAccelGroup *accel, GObject *window, guint keyval,  GdkModifierType modifier) {
  57         if( gtk_text_buffer_get_char_count(tb) )
  58                 gtk_text_buffer_set_text(tb,"",-1);
  59         else
  60                 gtk_main_quit();
  61 }
  62
  63 static char *get_text() {
  64         GtkTextIter start, end;
  65         gtk_text_buffer_get_start_iter(tb,&start);
  66         gtk_text_buffer_get_end_iter(tb,&end);
  67         return gtk_text_buffer_get_text(tb, &start, &end, FALSE);
  68 }
  69
  70
  71 static void hq(gboolean q, gboolean force){
  72         if (q != quality)
  73                 if (q)
  74                         gtk_settings_set_long_property(settings,"gtk-xft-antialias",1,"Hier halt");
  75                 else
  76                         gtk_settings_set_long_property(settings,"gtk-xft-antialias",0,"Hier halt");
  77         else
  78                 if (force)
  79                         gtk_widget_queue_draw(draw);
  80
  81         quality = q;
  82 }
  83
  84 static void redraw() {
  85         const char *text = pango_layout_get_text(layout);
  86         if (strlen(text) > 0) {
  87                 GdkGC *gc = gtk_widget_get_style(draw)->fg_gc[GTK_STATE_NORMAL];
  88                 int w1, h1;
  89                 pango_layout_get_pixel_size(layout, &w1, &h1);
  90                 if (w1>0 && h1>0) {
  91                         int w2 = draw->allocation.width;
  92                         int h2 = draw->allocation.height;
  93                         gdk_draw_layout(draw->window, gc, (w2-w1)/2,(h2-h1)/2,layout);
  94                         hq(TRUE, FALSE);
  95                 }
  96         }
  97 }
  98
  99 static gboolean text_clicked(GtkWidget *widget, GdkEventButton *event, gpointer *user_data) {
 100         if (event->type == GDK_BUTTON_PRESS && event->button == 2) {
 101                 GtkClipboard *cb = gtk_clipboard_get(GDK_SELECTION_PRIMARY);
 102
 103                 gchar *txt = gtk_clipboard_wait_for_text(cb);
 104                 if (txt != NULL) {
 105                         gtk_text_buffer_set_text(tb,txt,-1);
 106                         g_free(txt);
 107                 }
 108
 109         }
 110         return FALSE;
 111 }
 112
 113 static void resize() {
 114         int w1, h1, w2, h2;
 115         pango_layout_get_pixel_size(layout, &w1, &h1);
 116         if (w1>0 && h1>0) {
 117                 w2 = draw->allocation.width;
 118                 h2 = draw->allocation.height;
 119                 int s = pango_font_description_get_size(font);
 120                 s = min ((s*w2/w1), (s*h2/h1));
 121                 pango_font_description_set_size(font,s);
 122                 pango_layout_set_font_description(layout, font);
 123                 need_resize = FALSE;
 124         }
 125         else
 126                 need_resize = TRUE;
 127 }
 128
 129
 130 static void newtext(char *text) {
 131         pango_layout_set_text(layout, get_text(), -1);
 132         resize();
 133         hq(FALSE, TRUE);
 134 }
 135
 136 static struct option const long_options[] =
 137 {
 138         {"help",       no_argument,       NULL, 'h'},
 139         {"version",    no_argument,       NULL, 'V'},
 140         {"foreground", required_argument, NULL, 'f'},
 141         {"background", required_argument, NULL, 'b'},
 142         {0,0,0,0}
 143 };
 144
 145 static void usage(char *cmd) {
 146         printf("Usage: %s [-h|--help] [-V|--version] [-f|--foreground=330033] [-b|--background=ccffcc]\n", cmd);
 147 }
 148
 149 static void version() {
 150         printf("%s\n", PACKAGE_STRING);
 151 }
 152
 153 int main(int argc, char **argv) {
 154         GString *input;
 155         int c;
 156
 157         while ((c = getopt_long (argc, argv, "hVf:b:n:", long_options, (int *) 0)) != EOF) {
 158                 switch (c) {
 159                         case 'h':
 160                                 usage(argv[0]);
 161                                 return 0;
 162                                 break;
 163
 164                         case 'V':
 165                                 version();
 166                                 return 0;
 167                                 break;
 168
 169                         case 'f':
 170                                 foreground = optarg;
 171                                 break;
 172
 173                         case 'b':
 174                                 background = optarg;
 175                                 break;
 176
 177                         default:
 178                                 /* unknown switch received - at least
 179                                  * give usage but continue and use the
 180                                  * data */
 181                                 usage(argv[0]);
 182                                 break;
 183                 }
 184         }
 185
 186         gtk_init(&argc, &argv);
 187
 188         window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 189         gtk_window_set_decorated(GTK_WINDOW(window), FALSE);
 190         gtk_window_set_resizable(GTK_WINDOW(window), FALSE);
 191         gtk_window_set_icon_name (GTK_WINDOW (window), "sm");
 192
 193         GdkScreen *screen = gtk_window_get_screen(GTK_WINDOW(window));
 194         gtk_widget_set_size_request(window, gdk_screen_get_width(screen),
 195                                             gdk_screen_get_height(screen));
 196         gtk_window_fullscreen(GTK_WINDOW(window));
 197         g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
 198
 199         settings = gtk_settings_get_default();
 200         GdkColormap *colormap = gtk_widget_get_colormap(GTK_WIDGET(window));
 201         GdkColor white, black;
 202         gdk_colormap_alloc_color(colormap, &white, TRUE, TRUE);
 203         gdk_colormap_alloc_color(colormap, &black, TRUE, TRUE);
 204         if (foreground != NULL) {
 205                 gdk_color_parse(foreground, &black);
 206         } else {
 207                 gdk_color_parse("black", &black);
 208         }
 209         if (background != NULL) {
 210                 gdk_color_parse(background, &white);
 211         } else {
 212                 gdk_color_parse("white", &white);
 213         }
 214         gtk_widget_modify_bg(window, GTK_STATE_NORMAL, &white);
 215         gtk_widget_modify_fg(window, GTK_STATE_NORMAL, &black);
 216
 217         draw = gtk_drawing_area_new();
 218         gtk_widget_set_events(draw, GDK_BUTTON_PRESS_MASK);
 219         gtk_widget_set_size_request(draw,400,400);
 220         gtk_widget_modify_bg(draw, GTK_STATE_NORMAL, &white);
 221         gtk_widget_modify_fg(draw, GTK_STATE_NORMAL, &black);
 222         g_signal_connect(G_OBJECT(draw), "realize", G_CALLBACK(realize), NULL);
 223         g_signal_connect(G_OBJECT(draw), "button-press-event", G_CALLBACK(text_clicked), NULL);
 224
 225         GdkPixmap *pixmap = gdk_pixmap_new(NULL, 1, 1, 1);
 226         GdkColor color;
 227         cursor = gdk_cursor_new_from_pixmap(pixmap, pixmap, &color, &color, 0, 0);
 228
 229         tv = gtk_text_view_new();
 230         gtk_widget_modify_bg(tv, GTK_STATE_NORMAL, &white);
 231         gtk_widget_modify_fg(tv, GTK_STATE_NORMAL, &black);
 232         tb = gtk_text_view_get_buffer(GTK_TEXT_VIEW(tv));
 233
 234         if (argc > optind)
 235                 if (!strcmp(argv[optind], "-") ) {
 236                         // read from stdin
 237                         gchar buf[1024];
 238                         int num;
 239
 240                         input = g_string_new("");
 241
 242                         while ((num = fread (buf, 1, sizeof(buf), stdin)) > 0) {
 243                                 g_string_append_len(input, buf, num);
 244                         }
 245                 } else {
 246                         int i;
 247
 248                         input = g_string_new("");
 249
 250                         for (i = optind; i < argc; i++) {
 251                                 g_string_append(input, argv[i]);
 252
 253                                 if (i < argc - 1) {
 254                                         g_string_append(input, " ");
 255                                 }
 256                         }
 257                 }
 258         else
 259                 input = g_string_new(":-)");
 260
 261         gtk_text_buffer_set_text(tb, input->str, input->len);
 262         GtkTextIter start, end;
 263         gtk_text_buffer_get_bounds(tb, &start, &end);
 264         gtk_text_buffer_select_range(tb, &start, &end);
 265
 266         quit = gtk_button_new_from_stock(GTK_STOCK_QUIT);
 267         g_signal_connect(G_OBJECT(quit), "clicked", G_CALLBACK(gtk_main_quit), NULL);
 268         gtk_widget_modify_bg(quit, GTK_STATE_NORMAL, &white);
 269         gtk_widget_modify_fg(quit, GTK_STATE_NORMAL, &black);
 270
 271         GtkWidget *hbox = gtk_hbox_new(FALSE,0);
 272         gtk_box_pack_start(GTK_BOX(hbox), tv,   TRUE,  TRUE,  0);
 273         gtk_box_pack_start(GTK_BOX(hbox), quit, FALSE, FALSE, 0);
 274
 275         GtkWidget *vbox = gtk_vbox_new(FALSE,0);
 276         gtk_box_pack_start(GTK_BOX(vbox), draw, TRUE,  TRUE,  0);
 277         gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, FALSE, 0);
 278
 279         gtk_container_add(GTK_CONTAINER(window), vbox);
 280
 281         font = pango_font_description_new();
 282         pango_font_description_set_family(font, "sans-serif");
 283         pango_font_description_set_size(font, 20*PANGO_SCALE);
 284
 285         layout=  gtk_widget_create_pango_layout(draw,get_text());
 286         pango_layout_set_font_description(layout, font);
 287         pango_layout_set_alignment(layout,PANGO_ALIGN_CENTER);
 288
 289         GtkAccelGroup *accel = gtk_accel_group_new();
 290         guint key;
 291         GdkModifierType mod;
 292         gtk_accelerator_parse("<Ctrl>Q", &key, &mod);
 293         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(gtk_main_quit), NULL, NULL));
 294         gtk_accelerator_parse("Escape", &key, &mod);
 295         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(clear_text), NULL, NULL));
 296         gtk_window_add_accel_group(GTK_WINDOW(window), accel);
 297         gtk_widget_show_all(window);
 298
 299         g_signal_connect(G_OBJECT(draw), "configure-event", G_CALLBACK(resize), NULL);
 300         g_signal_connect(G_OBJECT(draw), "expose-event", G_CALLBACK(redraw), NULL);
 301         g_signal_connect(G_OBJECT(tb), "changed", G_CALLBACK(newtext), NULL);
 302
 303         resize();
 304
 305         gtk_main();
 306
 307         return 0;
 308 }