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
  26 static int min(int x, int y) {
  27         return x < y ? x : y;
  28 }
  29
  30
  31 static gboolean quality = TRUE;
  32 static gboolean need_resize = TRUE;
  33 static gboolean need_quick = TRUE;
  34
  35 static GtkWidget* window;
  36 static GtkWidget* draw;
  37 static GdkCursor *cursor;
  38 static GtkWidget* quit;
  39 static GtkWidget* tv;
  40 static GtkSettings* settings;
  41 static GtkTextBuffer* tb;
  42 static PangoFontDescription *font;
  43 static PangoLayout* layout;
  44
  45 static void realize(GtkWindow *window, GdkScreen *screen, gpointer data) {
  46         gdk_window_set_cursor(draw->window, cursor);
  47 }
  48
  49 static void clear_text(GtkAccelGroup *accel, GObject *window, guint keyval,  GdkModifierType modifier) {
  50         if( gtk_text_buffer_get_char_count(tb) )
  51                 gtk_text_buffer_set_text(tb,"",-1);
  52         else
  53                 gtk_main_quit();
  54 }
  55
  56 static char *get_text() {
  57         GtkTextIter start, end;
  58         gtk_text_buffer_get_start_iter(tb,&start);
  59         gtk_text_buffer_get_end_iter(tb,&end);
  60         return gtk_text_buffer_get_text(tb, &start, &end, FALSE);
  61 }
  62
  63
  64 static void hq(gboolean q, gboolean force){
  65         if (q != quality)
  66                 if (q)
  67                         gtk_settings_set_long_property(settings,"gtk-xft-antialias",1,"Hier halt");
  68                 else
  69                         gtk_settings_set_long_property(settings,"gtk-xft-antialias",0,"Hier halt");
  70         else
  71                 if (force)
  72                         gtk_widget_queue_draw(draw);
  73
  74         quality = q;
  75 }
  76
  77 static void redraw() {
  78         const char *text = pango_layout_get_text(layout);
  79         if (strlen(text) > 0) {
  80                 GdkGC *gc = gtk_widget_get_style(draw)->fg_gc[GTK_STATE_NORMAL];
  81                 int w1, h1;
  82                 pango_layout_get_pixel_size(layout, &w1, &h1);
  83                 if (w1>0 && h1>0) {
  84                         int w2 = draw->allocation.width;
  85                         int h2 = draw->allocation.height;
  86                         gdk_draw_layout(draw->window, gc, (w2-w1)/2,(h2-h1)/2,layout);
  87                         hq(TRUE, FALSE);
  88                 }
  89         }
  90 }
  91
  92 static gboolean text_clicked(GtkWidget *widget, GdkEventButton *event, gpointer *user_data) {
  93         if (event->type == GDK_BUTTON_PRESS && event->button == 2) {
  94                 GtkClipboard *cb = gtk_clipboard_get(GDK_SELECTION_PRIMARY);
  95
  96                 gchar *txt = gtk_clipboard_wait_for_text(cb);
  97                 if (txt != NULL) {
  98                         gtk_text_buffer_set_text(tb,txt,-1);
  99                         g_free(txt);
 100                 }
 101
 102         }
 103         return FALSE;
 104 }
 105
 106 static void resize() {
 107         int w1, h1, w2, h2;
 108         pango_layout_get_pixel_size(layout, &w1, &h1);
 109         if (w1>0 && h1>0) {
 110                 w2 = draw->allocation.width;
 111                 h2 = draw->allocation.height;
 112                 int s = pango_font_description_get_size(font);
 113                 s = min ((s*w2/w1), (s*h2/h1));
 114                 pango_font_description_set_size(font,s);
 115                 pango_layout_set_font_description(layout, font);
 116                 need_resize = FALSE;
 117         }
 118         else
 119                 need_resize = TRUE;
 120 }
 121
 122
 123 static void newtext(char *text) {
 124         pango_layout_set_text(layout, get_text(), -1);
 125         resize();
 126         hq(FALSE, TRUE);
 127 }
 128
 129 int main(int argc, char **argv) {
 130         GString *input;
 131
 132         gtk_init(&argc, &argv);
 133
 134         window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 135         gtk_window_set_decorated(GTK_WINDOW(window), FALSE);
 136         gtk_window_set_resizable(GTK_WINDOW(window), FALSE);
 137         GdkScreen *screen = gtk_window_get_screen(GTK_WINDOW(window));
 138         gtk_widget_set_size_request(window, gdk_screen_get_width(screen),
 139                                             gdk_screen_get_height(screen));
 140         gtk_window_fullscreen(GTK_WINDOW(window));
 141         g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
 142
 143         settings = gtk_settings_get_default();
 144         GdkColormap *colormap = gtk_widget_get_colormap(GTK_WIDGET(window));
 145         GdkColor white, black;
 146         gdk_colormap_alloc_color(colormap, &white, TRUE, TRUE);
 147         gdk_color_parse("white", &white);
 148         gdk_color_parse("black", &black);
 149         gtk_widget_modify_bg(window, GTK_STATE_NORMAL, &white);
 150         gtk_widget_modify_fg(window, GTK_STATE_NORMAL, &black);
 151
 152         draw = gtk_drawing_area_new();
 153         gtk_widget_set_events(draw, GDK_BUTTON_PRESS_MASK);
 154         gtk_widget_set_size_request(draw,400,400);
 155         gtk_widget_modify_bg(draw, GTK_STATE_NORMAL, &white);
 156         gtk_widget_modify_fg(draw, GTK_STATE_NORMAL, &black);
 157         g_signal_connect(G_OBJECT(draw), "realize", G_CALLBACK(realize), NULL);
 158         g_signal_connect(G_OBJECT(draw), "button-press-event", G_CALLBACK(text_clicked), NULL);
 159
 160         GdkPixmap *pixmap = gdk_pixmap_new(NULL, 1, 1, 1);
 161         GdkColor color;
 162         cursor = gdk_cursor_new_from_pixmap(pixmap, pixmap, &color, &color, 0, 0);
 163
 164         tv = gtk_text_view_new();
 165         gtk_widget_modify_bg(tv, GTK_STATE_NORMAL, &white);
 166         gtk_widget_modify_fg(tv, GTK_STATE_NORMAL, &black);
 167         tb = gtk_text_view_get_buffer(GTK_TEXT_VIEW(tv));
 168
 169         if (argc > 1)
 170                 if (!strcmp(argv[1], "-") ) {
 171                         // read from stdin
 172                         gchar buf[1024];
 173                         int num;
 174
 175                         input = g_string_new("");
 176
 177                         while ((num = fread (buf, 1, sizeof(buf), stdin)) > 0) {
 178                                 g_string_append_len(input, buf, num);
 179                         }
 180                 } else {
 181                         int i;
 182
 183                         input = g_string_new("");
 184
 185                         for (i = 1; i < argc; i++) {
 186                                 g_string_append(input, argv[i]);
 187
 188                                 if (i < argc - 1) {
 189                                         g_string_append(input, " ");
 190                                 }
 191                         }
 192                 }
 193         else
 194                 input = g_string_new(":-)");
 195
 196         gtk_text_buffer_set_text(tb, input->str, input->len);
 197
 198         quit = gtk_button_new_from_stock(GTK_STOCK_QUIT);
 199         g_signal_connect(G_OBJECT(quit), "clicked", G_CALLBACK(gtk_main_quit), NULL);
 200         gtk_widget_modify_bg(quit, GTK_STATE_NORMAL, &white);
 201         gtk_widget_modify_fg(quit, GTK_STATE_NORMAL, &black);
 202
 203         GtkWidget *hbox = gtk_hbox_new(FALSE,0);
 204         gtk_box_pack_start(GTK_BOX(hbox), tv,   TRUE,  TRUE,  0);
 205         gtk_box_pack_start(GTK_BOX(hbox), quit, FALSE, FALSE, 0);
 206
 207         GtkWidget *vbox = gtk_vbox_new(FALSE,0);
 208         gtk_box_pack_start(GTK_BOX(vbox), draw, TRUE,  TRUE,  0);
 209         gtk_box_pack_start(GTK_BOX(vbox), hbox, FALSE, FALSE, 0);
 210
 211         gtk_container_add(GTK_CONTAINER(window), vbox);
 212
 213         font = pango_font_description_new();
 214         pango_font_description_set_family(font, "sans-serif");
 215         pango_font_description_set_size(font, 20*PANGO_SCALE);
 216
 217         layout=  gtk_widget_create_pango_layout(draw,get_text());
 218         pango_layout_set_font_description(layout, font);
 219         pango_layout_set_alignment(layout,PANGO_ALIGN_CENTER);
 220
 221         GtkAccelGroup *accel = gtk_accel_group_new();
 222         guint key;
 223         GdkModifierType mod;
 224         gtk_accelerator_parse("<Ctrl>Q", &key, &mod);
 225         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(gtk_main_quit), NULL, NULL));
 226         gtk_accelerator_parse("Escape", &key, &mod);
 227         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(clear_text), NULL, NULL));
 228         gtk_window_add_accel_group(GTK_WINDOW(window), accel);
 229         gtk_widget_show_all(window);
 230
 231         g_signal_connect(G_OBJECT(draw), "configure-event", G_CALLBACK(resize), NULL);
 232         g_signal_connect(G_OBJECT(draw), "expose-event", G_CALLBACK(redraw), NULL);
 233         g_signal_connect(G_OBJECT(tb), "changed", G_CALLBACK(newtext), NULL);
 234
 235         resize();
 236
 237         gtk_main();
 238 }