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 = 1; // 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                         double s;
  96                         if (rotation == 0 || rotation == 2)
  97                                 s = min ((double)w2/w1, (double)h2/h1);
  98                         else
  99                                 s = min ((double)w2/h1, (double)h2/w1);
 100
 101
 102                         PangoMatrix matrix = PANGO_MATRIX_INIT;
 103
 104
 105                         pango_matrix_translate(&matrix, w2/2, h2/2);
 106                         pango_matrix_scale(&matrix, s, s);
 107                         pango_matrix_rotate (&matrix, rotation * 90);
 108                         pango_matrix_translate(&matrix, -w1/2, -h1/2);
 109                         PangoContext *context =   pango_layout_get_context(layout);
 110                         pango_context_set_matrix (context, &matrix);
 111                         pango_layout_context_changed (layout);
 112
 113
 114                         PangoRenderer *renderer = gdk_pango_renderer_get_default(screen);
 115                         gdk_pango_renderer_set_drawable(GDK_PANGO_RENDERER(renderer),
 116                                                         draw->window);
 117                         gdk_pango_renderer_set_gc(GDK_PANGO_RENDERER(renderer),
 118                                                         gc);
 119
 120                         printf("%i %i %i %i\n", w1, h1, w2, h2);
 121                         pango_renderer_draw_layout (renderer, layout, 0, 0);
 122                         hq(TRUE, FALSE);
 123                 }
 124         }
 125 }
 126
 127 static gboolean text_clicked(GtkWidget *widget, GdkEventButton *event, gpointer *user_data) {
 128         if (event->type == GDK_BUTTON_PRESS && event->button == 2) {
 129                 GtkClipboard *cb = gtk_clipboard_get(GDK_SELECTION_PRIMARY);
 130
 131                 gchar *txt = gtk_clipboard_wait_for_text(cb);
 132                 if (txt != NULL) {
 133                         gtk_text_buffer_set_text(tb,txt,-1);
 134                         g_free(txt);
 135                 }
 136
 137         }
 138         return FALSE;
 139 }
 140
 141 static void resize() {
 142         need_resize = FALSE;
 143         return;
 144
 145         int w1, h1, w2, h2;
 146
 147
 148         pango_layout_get_pixel_size(layout, &w1, &h1);
 149         if (w1>0 && h1>0) {
 150                 w2 = draw->allocation.width;
 151                 h2 = draw->allocation.height;
 152                 int s = pango_font_description_get_size(font);
 153                 s = min ((s*w2/w1), (s*h2/h1));
 154                 pango_font_description_set_size(font,s);
 155                 pango_layout_set_font_description(layout, font);
 156                 need_resize = FALSE;
 157         }
 158         else
 159                 need_resize = TRUE;
 160 }
 161
 162
 163 static void newtext(char *text) {
 164         pango_layout_set_text(layout, get_text(), -1);
 165         resize();
 166         hq(FALSE, TRUE);
 167 }
 168
 169 static struct option const long_options[] =
 170 {
 171         {"help",       no_argument,       NULL, 'h'},
 172         {"version",    no_argument,       NULL, 'V'},
 173         {"foreground", required_argument, NULL, 'f'},
 174         {"background", required_argument, NULL, 'b'},
 175         {"font",       required_argument, NULL, 'n'},
 176         {0,0,0,0}
 177 };
 178
 179 static void usage(char *cmd) {
 180         printf("Usage: %s [-h|--help] [-V|--version] [-f|--foreground=colordesc] [-b|--background=colordesc] [-n|--font=fontdesc]\n", cmd);
 181 }
 182
 183 static void version() {
 184         printf("%s\n", PACKAGE_STRING);
 185 }
 186
 187 int main(int argc, char **argv) {
 188         GString *input;
 189         int c;
 190
 191         while ((c = getopt_long (argc, argv, "hVf:b:n:", long_options, (int *) 0)) != EOF) {
 192                 switch (c) {
 193                         case 'h':
 194                                 usage(argv[0]);
 195                                 return 0;
 196                                 break;
 197
 198                         case 'V':
 199                                 version();
 200                                 return 0;
 201                                 break;
 202
 203                         case 'f':
 204                                 foreground = optarg;
 205                                 break;
 206
 207                         case 'b':
 208                                 background = optarg;
 209                                 break;
 210
 211                         case 'n':
 212                                 fontdesc = optarg;
 213                                 break;
 214
 215                         default:
 216                                 /* unknown switch received - at least
 217                                  * give usage but continue and use the
 218                                  * data */
 219                                 usage(argv[0]);
 220                                 break;
 221                 }
 222         }
 223
 224         gtk_init(&argc, &argv);
 225
 226         window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 227         gtk_window_set_decorated(GTK_WINDOW(window), FALSE);
 228         gtk_window_set_resizable(GTK_WINDOW(window), FALSE);
 229         gtk_window_set_icon_name (GTK_WINDOW (window), "sm");
 230
 231         screen = gtk_window_get_screen(GTK_WINDOW(window));
 232         gtk_widget_set_size_request(window, gdk_screen_get_width(screen),
 233                                             gdk_screen_get_height(screen));
 234         gtk_window_fullscreen(GTK_WINDOW(window));
 235         g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
 236
 237         settings = gtk_settings_get_default();
 238         GdkColormap *colormap = gtk_widget_get_colormap(GTK_WIDGET(window));
 239         GdkColor white, black;
 240         gdk_colormap_alloc_color(colormap, &white, TRUE, TRUE);
 241         gdk_colormap_alloc_color(colormap, &black, TRUE, TRUE);
 242         if (foreground != NULL) {
 243                 gdk_color_parse(foreground, &black);
 244         } else {
 245                 gdk_color_parse("black", &black);
 246         }
 247         if (background != NULL) {
 248                 gdk_color_parse(background, &white);
 249         } else {
 250                 gdk_color_parse("white", &white);
 251         }
 252         gtk_widget_modify_bg(window, GTK_STATE_NORMAL, &white);
 253         gtk_widget_modify_fg(window, GTK_STATE_NORMAL, &black);
 254
 255         draw = gtk_drawing_area_new();
 256         gtk_widget_set_events(draw, GDK_BUTTON_PRESS_MASK);
 257         gtk_widget_set_size_request(draw,400,400);
 258         gtk_widget_modify_bg(draw, GTK_STATE_NORMAL, &white);
 259         gtk_widget_modify_fg(draw, GTK_STATE_NORMAL, &black);
 260         g_signal_connect(G_OBJECT(draw), "realize", G_CALLBACK(realize), NULL);
 261         g_signal_connect(G_OBJECT(draw), "button-press-event", G_CALLBACK(text_clicked), NULL);
 262
 263         GdkPixmap *pixmap = gdk_pixmap_new(NULL, 1, 1, 1);
 264         GdkColor color;
 265         cursor = gdk_cursor_new_from_pixmap(pixmap, pixmap, &color, &color, 0, 0);
 266
 267         tv = gtk_text_view_new();
 268         gtk_widget_modify_bg(tv, GTK_STATE_NORMAL, &white);
 269         gtk_widget_modify_fg(tv, GTK_STATE_NORMAL, &black);
 270         tb = gtk_text_view_get_buffer(GTK_TEXT_VIEW(tv));
 271
 272         if (argc > optind)
 273                 if (!strcmp(argv[optind], "-") ) {
 274                         // read from stdin
 275                         gchar buf[1024];
 276                         int num;
 277
 278                         input = g_string_new("");
 279
 280                         while ((num = fread (buf, 1, sizeof(buf), stdin)) > 0) {
 281                                 g_string_append_len(input, buf, num);
 282                         }
 283                 } else {
 284                         int i;
 285
 286                         input = g_string_new("");
 287
 288                         for (i = optind; i < argc; i++) {
 289                                 g_string_append(input, argv[i]);
 290
 291                                 if (i < argc - 1) {
 292                                         g_string_append(input, " ");
 293                                 }
 294                         }
 295                 }
 296         else
 297                 input = g_string_new(":-)");
 298
 299         gtk_text_buffer_set_text(tb, input->str, input->len);
 300         GtkTextIter start, end;
 301         gtk_text_buffer_get_bounds(tb, &start, &end);
 302         gtk_text_buffer_select_range(tb, &start, &end);
 303
 304         quit = gtk_button_new_from_stock(GTK_STOCK_QUIT);
 305         g_signal_connect(G_OBJECT(quit), "clicked", G_CALLBACK(gtk_main_quit), NULL);
 306         gtk_widget_modify_bg(quit, GTK_STATE_NORMAL, &white);
 307         gtk_widget_modify_fg(quit, GTK_STATE_NORMAL, &black);
 308
 309         GtkWidget *hbox = gtk_hbox_new(FALSE,0);
 310         gtk_box_pack_start(GTK_BOX(hbox), tv,   TRUE,  TRUE,  0);
 311         gtk_box_pack_start(GTK_BOX(hbox), quit, FALSE, FALSE, 0);
 312
 313         GtkWidget *vbox = gtk_vbox_new(FALSE,0);
 314         gtk_box_pack_start(GTK_BOX(vbox), draw, TRUE,  TRUE,  0);
 315         gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, FALSE, 0);
 316
 317         gtk_container_add(GTK_CONTAINER(window), vbox);
 318
 319         font = pango_font_description_new();
 320         if (fontdesc != NULL) {
 321                 pango_font_description_set_family(font, fontdesc);
 322         } else {
 323                 pango_font_description_set_family(font, "sans-serif");
 324         }
 325         pango_font_description_set_size(font, 200*PANGO_SCALE);
 326
 327         layout=  gtk_widget_create_pango_layout(draw,get_text());
 328         pango_layout_set_font_description(layout, font);
 329         pango_layout_set_alignment(layout,PANGO_ALIGN_CENTER);
 330
 331         GtkAccelGroup *accel = gtk_accel_group_new();
 332         guint key;
 333         GdkModifierType mod;
 334         gtk_accelerator_parse("<Ctrl>Q", &key, &mod);
 335         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(gtk_main_quit), NULL, NULL));
 336         gtk_accelerator_parse("Escape", &key, &mod);
 337         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(clear_text), NULL, NULL));
 338         gtk_window_add_accel_group(GTK_WINDOW(window), accel);
 339         gtk_widget_show_all(window);
 340
 341         g_signal_connect(G_OBJECT(draw), "configure-event", G_CALLBACK(resize), NULL);
 342         g_signal_connect(G_OBJECT(draw), "expose-event", G_CALLBACK(redraw), NULL);
 343         g_signal_connect(G_OBJECT(tb), "changed", G_CALLBACK(newtext), NULL);
 344
 345         resize();
 346
 347         gtk_main();
 348
 349         return 0;
 350 }