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 #define AUTOHIDE_TIMEOUT 5
  37
  38 static gboolean quality = TRUE;
  39 static gboolean need_resize = TRUE;
  40
  41 static int timeout_id=0;
  42
  43 static GtkWidget* window;
  44 static GtkWidget* draw;
  45 static GdkCursor *cursor;
  46 static GtkWidget* quit;
  47 static GtkWidget* tv;
  48 static GtkWidget* entry_widget;
  49 static GtkSettings* settings;
  50 static GtkTextBuffer* tb;
  51 static PangoFontDescription *font;
  52 static PangoLayout* layout;
  53 static char *foreground = NULL;
  54 static char *background = NULL;
  55 static char *fontdesc = NULL;
  56 static rotation = 0; // 0 = normal, 1 = left, 2 = inverted, 3 = right
  57
  58 gboolean hide_entry(gpointer *user_data) {
  59         gtk_widget_hide(entry_widget);
  60         gtk_widget_grab_focus(tv);
  61         gtk_widget_queue_draw(draw);
  62         gdk_window_set_cursor(GTK_WIDGET(draw)->window, cursor);
  63         return FALSE;
  64 }
  65
  66 static void show_entry() {
  67         if (timeout_id) {
  68                 g_source_remove(timeout_id);
  69                 timeout_id = 0;
  70         }
  71         gtk_widget_show(entry_widget);
  72         gdk_window_set_cursor(GTK_WIDGET(draw)->window, NULL);
  73
  74         timeout_id = g_timeout_add_seconds (AUTOHIDE_TIMEOUT, (GSourceFunc)hide_entry, NULL);
  75 }
  76
  77 static void clear_text(GtkAccelGroup *accel, GObject *window, guint keyval,  GdkModifierType modifier) {
  78         if( gtk_text_buffer_get_char_count(tb) ) {
  79                 gtk_text_buffer_set_text(tb,"",-1);
  80                 show_entry();
  81         } else {
  82                 gtk_main_quit();
  83         }
  84 }
  85
  86 static char *get_text() {
  87         GtkTextIter start, end;
  88         gtk_text_buffer_get_start_iter(tb,&start);
  89         gtk_text_buffer_get_end_iter(tb,&end);
  90         return gtk_text_buffer_get_text(tb, &start, &end, FALSE);
  91 }
  92
  93 static void hq(gboolean q, gboolean force){
  94         if (q != quality)
  95                 if (q)
  96                         gtk_settings_set_long_property(settings,"gtk-xft-antialias",1,"Hier halt");
  97                 else
  98                         gtk_settings_set_long_property(settings,"gtk-xft-antialias",0,"Hier halt");
  99         else
 100                 if (force)
 101                         gtk_widget_queue_draw(draw);
 102
 103         quality = q;
 104 }
 105
 106 static void redraw() {
 107         const char *text = pango_layout_get_text(layout);
 108         if (strlen(text) > 0) {
 109                 GdkGC *gc = gtk_widget_get_style(draw)->fg_gc[GTK_STATE_NORMAL];
 110                 int w1, h1;
 111                 pango_layout_get_pixel_size(layout, &w1, &h1);
 112                 if (w1>0 && h1>0) {
 113                         int w2 = window->allocation.width;
 114                         int h2 = window->allocation.height;
 115
 116                         int rw1, rh1;
 117                         if (rotation == 0 || rotation == 2) {
 118                                 rw1 = w1;
 119                                 rh1 = h1;
 120                         } else {
 121                                 rw1 = h1;
 122                                 rh1 = w1;
 123                         }
 124
 125                         double s = min ((double)w2/rw1, (double)h2/rh1);
 126
 127
 128                         PangoMatrix matrix = PANGO_MATRIX_INIT;
 129                         // Move matrix to the screen center
 130                         pango_matrix_translate(&matrix, w2/2, h2/2);
 131                         // Scale as required
 132                         pango_matrix_scale(&matrix, s, s);
 133                         // Rotate if needed
 134                         pango_matrix_rotate (&matrix, rotation * 90);
 135                         // Move matrix so that text will be centered
 136                         //pango_matrix_translate(&matrix, -w1/2, -h1/2);
 137
 138                         // Apply matrix
 139                         PangoContext *context =  pango_layout_get_context(layout);
 140                         pango_context_set_matrix (context, &matrix);
 141                         pango_layout_context_changed (layout);
 142
 143                         gdk_draw_layout(draw->window, gc,
 144                                 (w2-(s*rw1))/2, (h2-(s*rh1))/2,layout);
 145                         hq(TRUE, FALSE);
 146                 }
 147         }
 148 }
 149
 150 static gboolean text_clicked(GtkWidget *widget, GdkEventButton *event, gpointer *user_data) {
 151         show_entry();
 152         if (event->type == GDK_BUTTON_PRESS && event->button == 2) {
 153                 GtkClipboard *cb = gtk_clipboard_get(GDK_SELECTION_PRIMARY);
 154
 155                 gchar *txt = gtk_clipboard_wait_for_text(cb);
 156                 if (txt != NULL) {
 157                         gtk_text_buffer_set_text(tb,txt,-1);
 158                         g_free(txt);
 159                 }
 160
 161         }
 162         return FALSE;
 163 }
 164
 165 static void newtext() {
 166         show_entry();
 167         pango_layout_set_text(layout, get_text(), -1);
 168         hq(FALSE, TRUE);
 169 }
 170
 171 static struct option const long_options[] =
 172 {
 173         {"help",       no_argument,       NULL, 'h'},
 174         {"version",    no_argument,       NULL, 'V'},
 175         {"foreground", required_argument, NULL, 'f'},
 176         {"background", required_argument, NULL, 'b'},
 177         {"font",       required_argument, NULL, 'n'},
 178         {"rotate",     required_argument, NULL, 'r'},
 179         {0,0,0,0}
 180 };
 181
 182 static void usage(char *cmd) {
 183         printf("Usage: %s [-h|--help] [-V|--version] [-f|--foreground=colordesc] [-b|--background=colordesc] [-n|--font=fontdesc] [-r|--rotate=0,1,2,3]\n", cmd);
 184 }
 185
 186 static void version() {
 187         printf("%s\n", PACKAGE_STRING);
 188 }
 189
 190 int main(int argc, char **argv) {
 191         GString *input;
 192         int c;
 193         int input_provided = 0;
 194
 195         while ((c = getopt_long (argc, argv, "hVf:b:n:r:", long_options, (int *) 0)) != EOF) {
 196                 switch (c) {
 197                         case 'h':
 198                                 usage(argv[0]);
 199                                 return 0;
 200                                 break;
 201
 202                         case 'V':
 203                                 version();
 204                                 return 0;
 205                                 break;
 206
 207                         case 'f':
 208                                 foreground = optarg;
 209                                 break;
 210
 211                         case 'b':
 212                                 background = optarg;
 213                                 break;
 214
 215                         case 'n':
 216                                 fontdesc = optarg;
 217                                 break;
 218                         case 'r':
 219                                 rotation = atoi(optarg);
 220                                 break;
 221                         default:
 222                                 /* unknown switch received - at least
 223                                  * give usage but continue and use the
 224                                  * data */
 225                                 usage(argv[0]);
 226                                 break;
 227                 }
 228         }
 229
 230         gtk_init(&argc, &argv);
 231
 232         window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 233         gtk_window_set_decorated(GTK_WINDOW(window), FALSE);
 234         gtk_window_set_resizable(GTK_WINDOW(window), FALSE);
 235         gtk_window_set_icon_name (GTK_WINDOW (window), "sm");
 236
 237         GdkScreen *screen = gtk_window_get_screen(GTK_WINDOW(window));
 238         gtk_widget_set_size_request(window, gdk_screen_get_width(screen),
 239                                             gdk_screen_get_height(screen));
 240         gtk_window_fullscreen(GTK_WINDOW(window));
 241         g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
 242
 243         settings = gtk_settings_get_default();
 244         GdkColormap *colormap = gtk_widget_get_colormap(GTK_WIDGET(window));
 245         GdkColor white, black;
 246         gdk_colormap_alloc_color(colormap, &white, TRUE, TRUE);
 247         gdk_colormap_alloc_color(colormap, &black, TRUE, TRUE);
 248         if (foreground != NULL) {
 249                 gdk_color_parse(foreground, &black);
 250         } else {
 251                 gdk_color_parse("black", &black);
 252         }
 253         if (background != NULL) {
 254                 gdk_color_parse(background, &white);
 255         } else {
 256                 gdk_color_parse("white", &white);
 257         }
 258
 259         draw = gtk_drawing_area_new();
 260         gtk_widget_set_events(draw, GDK_BUTTON_PRESS_MASK);
 261         gtk_widget_set_size_request(draw,400,400);
 262         gtk_widget_modify_bg(draw, GTK_STATE_NORMAL, &white);
 263         gtk_widget_modify_fg(draw, GTK_STATE_NORMAL, &black);
 264         g_signal_connect(G_OBJECT(draw), "button-press-event", G_CALLBACK(text_clicked), NULL);
 265
 266         GdkPixmap *pixmap = gdk_pixmap_new(NULL, 1, 1, 1);
 267         GdkColor color;
 268         cursor = gdk_cursor_new_from_pixmap(pixmap, pixmap, &color, &color, 0, 0);
 269
 270         tv = gtk_text_view_new();
 271         tb = gtk_text_view_get_buffer(GTK_TEXT_VIEW(tv));
 272
 273         if (argc > optind)
 274                 if (!strcmp(argv[optind], "-") ) {
 275                         // read from stdin
 276                         gchar buf[1024];
 277                         int num;
 278
 279                         input = g_string_new("");
 280
 281                         while ((num = fread (buf, 1, sizeof(buf), stdin)) > 0) {
 282                                 g_string_append_len(input, buf, num);
 283                         }
 284
 285                         // remove trailing newline, if any
 286                         if ((input->len > 0) && (input->str[input->len - 1] == '\n')) {
 287                                 g_string_truncate(input, input->len - 1);
 288                         }
 289                         input_provided++;
 290                 } else {
 291                         int i;
 292
 293                         input = g_string_new("");
 294
 295                         for (i = optind; i < argc; i++) {
 296                                 g_string_append(input, argv[i]);
 297
 298                                 if (i < argc - 1) {
 299                                         g_string_append(input, " ");
 300                                 }
 301                         }
 302                         input_provided++;
 303                 }
 304         else
 305                 input = g_string_new(":-)");
 306
 307         gtk_text_buffer_set_text(tb, input->str, input->len);
 308         GtkTextIter start, end;
 309         gtk_text_buffer_get_bounds(tb, &start, &end);
 310         gtk_text_buffer_select_range(tb, &start, &end);
 311
 312         quit = gtk_button_new_from_stock(GTK_STOCK_QUIT);
 313         g_signal_connect(G_OBJECT(quit), "clicked", G_CALLBACK(gtk_main_quit), NULL);
 314
 315         GtkWidget *vbox_button = gtk_vbox_new(FALSE, 0);
 316         gtk_box_pack_end(GTK_BOX(vbox_button), quit, FALSE, FALSE, 0);
 317
 318         GtkWidget *hbox = gtk_hbox_new(FALSE,0);
 319         entry_widget = hbox;
 320         gtk_box_pack_start(GTK_BOX(hbox), tv,   TRUE,  TRUE,  0);
 321         gtk_box_pack_start(GTK_BOX(hbox), vbox_button, FALSE, FALSE, 0);
 322
 323         GtkWidget *vbox = gtk_vbox_new(FALSE,0);
 324         gtk_box_pack_start(GTK_BOX(vbox), draw, TRUE, TRUE, 0);
 325         gtk_box_pack_end(GTK_BOX(vbox), hbox, FALSE, FALSE, 0);
 326
 327         gtk_container_add(GTK_CONTAINER(window), vbox);
 328
 329         font = pango_font_description_new();
 330         if (fontdesc != NULL) {
 331                 pango_font_description_set_family(font, fontdesc);
 332         } else {
 333                 pango_font_description_set_family(font, "sans-serif");
 334         }
 335         pango_font_description_set_size(font, 200*PANGO_SCALE);
 336
 337         layout = gtk_widget_create_pango_layout(window,get_text());
 338         pango_layout_set_font_description(layout, font);
 339         pango_layout_set_alignment(layout,PANGO_ALIGN_CENTER);
 340
 341         GtkAccelGroup *accel = gtk_accel_group_new();
 342         guint key;
 343         GdkModifierType mod;
 344         gtk_accelerator_parse("<Ctrl>Q", &key, &mod);
 345         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(gtk_main_quit), NULL, NULL));
 346         gtk_accelerator_parse("Escape", &key, &mod);
 347         gtk_accel_group_connect(accel, key, mod, 0, g_cclosure_new(G_CALLBACK(clear_text), NULL, NULL));
 348         gtk_window_add_accel_group(GTK_WINDOW(window), accel);
 349         gtk_widget_show_all(window);
 350
 351         g_signal_connect_after(G_OBJECT(draw), "expose-event", G_CALLBACK(redraw), NULL);
 352         g_signal_connect(G_OBJECT(tb), "changed", G_CALLBACK(newtext), NULL);
 353
 354         if (!input_provided)
 355                 show_entry();
 356         else
 357                 hide_entry(NULL);
 358
 359         gtk_main();
 360
 361         return 0;
 362 }