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 <math.h>
  26
  27 #include "config.h"
  28
  29 #ifndef _GNU_SOURCE
  30 #define _GNU_SOURCE                             /* for getopt_long */
  31 #endif
  32 #include <getopt.h>
  33
  34 #define min(x,y) ((x) < (y) ? (x) : (y))
  35
  36 static gboolean quality = TRUE;
  37 static gboolean need_resize = TRUE;
  38
  39 static GtkWidget* window;
  40 static GdkScreen *screen;
  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 static char *fontdesc = NULL;
  52 static rotation = 0; // 0 = normal, 1 = left, 2 = inverted, 3 = right
  53
  54 static void realize(GtkWindow *window, GdkScreen *screen, gpointer data) {
  55         gdk_window_set_cursor(draw->window, cursor);
  56 }
  57
  58 static void clear_text(GtkAccelGroup *accel, GObject *window, guint keyval,  GdkModifierType modifier) {
  59         if( gtk_text_buffer_get_char_count(tb) )
  60                 gtk_text_buffer_set_text(tb,"",-1);
  61         else
  62                 gtk_main_quit();
  63 }
  64
  65 static char *get_text() {
  66         GtkTextIter start, end;
  67         gtk_text_buffer_get_start_iter(tb,&start);
  68         gtk_text_buffer_get_end_iter(tb,&end);
  69         return gtk_text_buffer_get_text(tb, &start, &end, FALSE);
  70 }
  71
  72 static void hq(gboolean q, gboolean force){
  73         if (q != quality)
  74                 if (q)
  75                         gtk_settings_set_long_property(settings,"gtk-xft-antialias",1,"Hier halt");
  76                 else
  77                         gtk_settings_set_long_property(settings,"gtk-xft-antialias",0,"Hier halt");
  78         else
  79                 if (force)
  80                         gtk_widget_queue_draw(draw);
  81
  82         quality = q;
  83 }
  84
  85 static void redraw() {
  86         const char *text = pango_layout_get_text(layout);
  87         if (strlen(text) > 0) {
  88                 GdkGC *gc = gtk_widget_get_style(draw)->fg_gc[GTK_STATE_NORMAL];
  89                 int w1, h1;
  90                 pango_layout_get_pixel_size(layout, &w1, &h1);
  91                 if (w1>0 && h1>0) {
  92                         int w2 = draw->allocation.width;
  93                         int h2 = draw->allocation.height;
  94
  95                         int rw1, rh1;
  96                         if (rotation == 0 || rotation == 2) {
  97                                 rw1 = w1;
  98                                 rh1 = h1;
  99                         } else {
 100                                 rw1 = h1;
 101                                 rh1 = w1;
 102                         }
 103
 104                         double s = min ((double)w2/rw1, (double)h2/rh1);
 105
 106
 107                         PangoMatrix matrix = PANGO_MATRIX_INIT;
 108                         // Move matrix to the screen center
 109                         pango_matrix_translate(&matrix, w2/2, h2/2);
 110                         // Scale as required
 111                         pango_matrix_scale(&matrix, s, s);
 112                         // Rotate if needed
 113                         pango_matrix_rotate (&matrix, rotation * 90);
 114                         // Move matrix so that text will be centered
 115                         //pango_matrix_translate(&matrix, -w1/2, -h1/2);
 116
 117                         // Apply matrix
 118                         PangoContext *context =  pango_layout_get_context(layout);
 119                         pango_context_set_matrix (context, &matrix);
 120                         pango_layout_context_changed (layout);
 121
 122                         gdk_draw_layout(draw->window, gc,
 123                                 (w2-(s*rw1))/2, (h2-(s*rh1))/2,layout);
 124                         hq(TRUE, FALSE);
 125                 }
 126         }
 127 }
 128
 129 static gboolean text_clicked(GtkWidget *widget, GdkEventButton *event, gpointer *user_data) {
 130         if (event->type == GDK_BUTTON_PRESS && event->button == 2) {
 131                 GtkClipboard *cb = gtk_clipboard_get(GDK_SELECTION_PRIMARY);
 132
 133                 gchar *txt = gtk_clipboard_wait_for_text(cb);
 134                 if (txt != NULL) {
 135                         gtk_text_buffer_set_text(tb,txt,-1);
 136                         g_free(txt);
 137                 }
 138
 139         }
 140         return FALSE;
 141 }
 142
 143 static void newtext(char *text) {
 144         pango_layout_set_text(layout, get_text(), -1);
 145         hq(FALSE, TRUE);
 146 }
 147
 148 static struct option const long_options[] =
 149 {
 150         {"help",       no_argument,       NULL, 'h'},
 151         {"version",    no_argument,       NULL, 'V'},
 152         {"foreground", required_argument, NULL, 'f'},
 153         {"background", required_argument, NULL, 'b'},
 154         {"font",       required_argument, NULL, 'n'},
 155         {"rotate",     required_argument, NULL, 'r'},
 156         {0,0,0,0}
 157 };
 158
 159 static void usage(char *cmd) {
 160         printf("Usage: %s [-h|--help] [-V|--version] [-f|--foreground=colordesc] [-b|--background=colordesc] [-n|--font=fontdesc] [-r|--rotate=0,1,2,3]\n", cmd);
 161 }
 162
 163 static void version() {
 164         printf("%s\n", PACKAGE_STRING);
 165 }
 166
 167 int main(int argc, char **argv) {
 168         GString *input;
 169         int c;
 170
 171         while ((c = getopt_long (argc, argv, "hVf:b:n:r:", long_options, (int *) 0)) != EOF) {
 172                 switch (c) {
 173                         case 'h':
 174                                 usage(argv[0]);
 175                                 return 0;
 176                                 break;
 177
 178                         case 'V':
 179                                 version();
 180                                 return 0;
 181                                 break;
 182
 183                         case 'f':
 184                                 foreground = optarg;
 185                                 break;
 186
 187                         case 'b':
 188                                 background = optarg;
 189                                 break;
 190
 191                         case 'n':
 192                                 fontdesc = optarg;
 193                                 break;
 194                         case 'r':
 195                                 rotation = atoi(optarg);
 196                                 break;
 197                         default:
 198                                 /* unknown switch received - at least
 199                                  * give usage but continue and use the
 200                                  * data */
 201                                 usage(argv[0]);
 202                                 break;
 203                 }
 204         }
 205
 206         gtk_init(&argc, &argv);
 207
 208         window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 209         gtk_window_set_decorated(GTK_WINDOW(window), FALSE);
 210         gtk_window_set_resizable(GTK_WINDOW(window), FALSE);
 211         gtk_window_set_icon_name (GTK_WINDOW (window), "sm");
 212
 213         screen = gtk_window_get_screen(GTK_WINDOW(window));
 214         gtk_widget_set_size_request(window, gdk_screen_get_width(screen),
 215                                             gdk_screen_get_height(screen));
 216         gtk_window_fullscreen(GTK_WINDOW(window));
 217         g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
 218
 219         settings = gtk_settings_get_default();
 220         GdkColormap *colormap = gtk_widget_get_colormap(GTK_WIDGET(window));
 221         GdkColor white, black;
 222         gdk_colormap_alloc_color(colormap, &white, TRUE, TRUE);
 223         gdk_colormap_alloc_color(colormap, &black, TRUE, TRUE);
 224         if (foreground != NULL) {
 225                 gdk_color_parse(foreground, &black);
 226         } else {
 227                 gdk_color_parse("black", &black);
 228         }
 229         if (background != NULL) {
 230                 gdk_color_parse(background, &white);
 231         } else {
 232                 gdk_color_parse("white", &white);
 233         }
 234         gtk_widget_modify_bg(window, GTK_STATE_NORMAL, &white);
 235         gtk_widget_modify_fg(window, GTK_STATE_NORMAL, &black);
 236
 237         draw = gtk_drawing_area_new();
 238         gtk_widget_set_events(draw, GDK_BUTTON_PRESS_MASK);
 239         gtk_widget_set_size_request(draw,400,400);
 240         gtk_widget_modify_bg(draw, GTK_STATE_NORMAL, &white);
 241         gtk_widget_modify_fg(draw, GTK_STATE_NORMAL, &black);
 242         g_signal_connect(G_OBJECT(draw), "realize", G_CALLBACK(realize), NULL);
 243         g_signal_connect(G_OBJECT(draw), "button-press-event", G_CALLBACK(text_clicked), NULL);
 244
 245         GdkPixmap *pixmap = gdk_pixmap_new(NULL, 1, 1, 1);
 246         GdkColor color;
 247         cursor = gdk_cursor_new_from_pixmap(pixmap, pixmap, &color, &color, 0, 0);
 248
 249         tv = gtk_text_view_new();
 250         gtk_widget_modify_bg(tv, GTK_STATE_NORMAL, &white);
 251         gtk_widget_modify_fg(tv, GTK_STATE_NORMAL, &black);
 252         tb = gtk_text_view_get_buffer(GTK_TEXT_VIEW(tv));
 253
 254         if (argc > optind)
 255                 if (!strcmp(argv[optind], "-") ) {
 256                         // read from stdin
 257                         gchar buf[1024];
 258                         int num;
 259
 260                         input = g_string_new("");
 261
 262                         while ((num = fread (buf, 1, sizeof(buf), stdin)) > 0) {
 263                                 g_string_append_len(input, buf, num);
 264                         }
 265                 } else {
 266                         int i;
 267
 268                         input = g_string_new("");
 269
 270                         for (i = optind; i < argc; i++) {
 271                                 g_string_append(input, argv[i]);
 272
 273                                 if (i < argc - 1) {
 274                                         g_string_append(input, " ");
 275                                 }
 276                         }
 277                 }
 278         else
 279                 input = g_string_new(":-)");
 280
 281         gtk_text_buffer_set_text(tb, input->str, input->len);
 282         GtkTextIter start, end;
 283         gtk_text_buffer_get_bounds(tb, &start, &end);
 284         gtk_text_buffer_select_range(tb, &start, &end);
 285
 286         quit = gtk_button_new_from_stock(GTK_STOCK_QUIT);
 287         g_signal_connect(G_OBJECT(quit), "clicked", G_CALLBACK(gtk_main_quit), NULL);
 288         gtk_widget_modify_bg(quit, GTK_STATE_NORMAL, &white);
 289         gtk_widget_modify_fg(quit, GTK_STATE_NORMAL, &black);
 290
 291         GtkWidget *hbox = gtk_hbox_new(FALSE,0);
 292         gtk_box_pack_start(GTK_BOX(hbox), tv,   TRUE,  TRUE,  0);
 293         gtk_box_pack_start(GTK_BOX(hbox), quit, FALSE, FALSE, 0);
 294
 295         GtkWidget *vbox = gtk_vbox_new(FALSE,0);
 296         gtk_box_pack_start(GTK_BOX(vbox), draw, TRUE,  TRUE,  0);
 297         gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, FALSE, 0);
 298
 299         gtk_container_add(GTK_CONTAINER(window), vbox);
 300
 301         font = pango_font_description_new();
 302         if (fontdesc != NULL) {
 303                 pango_font_description_set_family(font, fontdesc);
 304         } else {
 305                 pango_font_description_set_family(font, "sans-serif");
 306         }
 307         pango_font_description_set_size(font, 200*PANGO_SCALE);
 308
 309         layout=  gtk_widget_create_pango_layout(draw,get_text());
 310         pango_layout_set_font_description(layout, font);
 311         pango_layout_set_alignment(layout,PANGO_ALIGN_CENTER);
 312
 313         GtkAccelGroup *accel = gtk_accel_group_new();
 314         guint key;
 315         GdkModifierType mod;
 316         gtk_accelerator_parse("<Ctrl>Q", &key, &mod);
 317         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(gtk_main_quit), NULL, NULL));
 318         gtk_accelerator_parse("Escape", &key, &mod);
 319         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(clear_text), NULL, NULL));
 320         gtk_window_add_accel_group(GTK_WINDOW(window), accel);
 321         gtk_widget_show_all(window);
 322
 323         g_signal_connect(G_OBJECT(draw), "expose-event", G_CALLBACK(redraw), NULL);
 324         g_signal_connect(G_OBJECT(tb), "changed", G_CALLBACK(newtext), NULL);
 325
 326         gtk_main();
 327
 328         return 0;
 329 }