icuSources/samples/layout/gnomelayout.cpp

   1
   2 /*
   3  *******************************************************************************
   4  *
   5  *   © 2016 and later: Unicode, Inc. and others.
   6  *   License & terms of use: http://www.unicode.org/copyright.html#License
   7  *
   8  *******************************************************************************
   9  ****************************************************************************** *
  10  *
  11  *   Copyright (C) 1999-2007, International Business Machines
  12  *   Corporation and others.  All Rights Reserved.
  13  *
  14  ****************************************************************************** *
  15  *   file name:  gnomelayout.cpp
  16  *
  17  *   created on: 09/04/2001
  18  *   created by: Eric R. Mader
  19  */
  20
  21 #include <gnome.h>
  22 #include <ft2build.h>
  23 #include FT_FREETYPE_H
  24
  25 #include "unicode/ustring.h"
  26 #include "unicode/uscript.h"
  27
  28 #include "GnomeFontInstance.h"
  29
  30 #include "paragraph.h"
  31
  32 #include "GnomeGUISupport.h"
  33 #include "GnomeFontMap.h"
  34 #include "UnicodeReader.h"
  35 #include "ScriptCompositeFontInstance.h"
  36
  37 #define ARRAY_LENGTH(array) (sizeof array / sizeof array[0])
  38
  39 struct Context
  40 {
  41     long width;
  42     long height;
  43     Paragraph *paragraph;
  44 };
  45
  46 static FT_Library engine;
  47 static GnomeGUISupport *guiSupport;
  48 static GnomeFontMap *fontMap;
  49 static ScriptCompositeFontInstance *font;
  50
  51 static GSList *appList = NULL;
  52
  53 GtkWidget *newSample(const gchar *fileName);
  54 void       closeSample(GtkWidget *sample);
  55
  56 void showabout(GtkWidget */*widget*/, gpointer /*data*/)
  57 {
  58     GtkWidget *aboutBox;
  59     const gchar *documentedBy[] = {NULL};
  60     const gchar *writtenBy[] = {
  61         "Eric Mader",
  62         NULL
  63     };
  64
  65     aboutBox = gnome_about_new("Gnome Layout Sample",
  66                                "0.1",
  67                                "Copyright (C) 1998-2006 By International Business Machines Corporation and others. All Rights Reserved.",
  68                                "A simple demo of the ICU LayoutEngine.",
  69                                writtenBy,
  70                                documentedBy,
  71                                "",
  72                                NULL);
  73
  74     gtk_widget_show(aboutBox);
  75 }
  76
  77 void notimpl(GtkObject */*object*/, gpointer /*data*/)
  78 {
  79     gnome_ok_dialog("Not implemented...");
  80 }
  81
  82 gchar *prettyTitle(const gchar *path)
  83 {
  84   const gchar *name  = g_basename(path);
  85   gchar *title = g_strconcat("Gnome Layout Sample - ", name, NULL);
  86
  87   return title;
  88 }
  89
  90 void openOK(GtkObject */*object*/, gpointer data)
  91 {
  92   GtkFileSelection *fileselection = GTK_FILE_SELECTION(data);
  93   GtkWidget *app = GTK_WIDGET(gtk_object_get_data(GTK_OBJECT(fileselection), "app"));
  94   Context *context = (Context *) gtk_object_get_data(GTK_OBJECT(app), "context");
  95   gchar *fileName  = g_strdup(gtk_file_selection_get_filename(fileselection));
  96   Paragraph *newPara;
  97
  98   gtk_widget_destroy(GTK_WIDGET(fileselection));
  99
 100   newPara = Paragraph::paragraphFactory(fileName, font, guiSupport);
 101
 102   if (newPara != NULL) {
 103     gchar *title = prettyTitle(fileName);
 104     GtkWidget *area = GTK_WIDGET(gtk_object_get_data(GTK_OBJECT(app), "area"));
 105
 106     if (context->paragraph != NULL) {
 107       delete context->paragraph;
 108     }
 109
 110     context->paragraph = newPara;
 111     gtk_window_set_title(GTK_WINDOW(app), title);
 112
 113     gtk_widget_hide(area);
 114     context->paragraph->breakLines(context->width, context->height);
 115     gtk_widget_show_all(area);
 116
 117     g_free(title);
 118   }
 119
 120   g_free(fileName);
 121 }
 122
 123 void openfile(GtkObject */*object*/, gpointer data)
 124 {
 125   GtkWidget *app = GTK_WIDGET(data);
 126   GtkWidget *fileselection;
 127   GtkWidget *okButton;
 128   GtkWidget *cancelButton;
 129
 130   fileselection =
 131     gtk_file_selection_new("Open File");
 132
 133   gtk_object_set_data(GTK_OBJECT(fileselection), "app", app);
 134
 135   okButton =
 136     GTK_FILE_SELECTION(fileselection)->ok_button;
 137
 138   cancelButton =
 139     GTK_FILE_SELECTION(fileselection)->cancel_button;
 140
 141   gtk_signal_connect(GTK_OBJECT(fileselection), "destroy",
 142                      GTK_SIGNAL_FUNC(gtk_main_quit), NULL);
 143
 144   gtk_signal_connect(GTK_OBJECT(okButton), "clicked",
 145                      GTK_SIGNAL_FUNC(openOK), fileselection);
 146
 147   gtk_signal_connect_object(GTK_OBJECT(cancelButton), "clicked",
 148                      GTK_SIGNAL_FUNC(gtk_widget_destroy), GTK_OBJECT(fileselection));
 149
 150   gtk_window_set_modal(GTK_WINDOW(fileselection), TRUE);
 151   gtk_widget_show(fileselection);
 152   gtk_main();
 153 }
 154
 155 void newapp(GtkObject */*object*/, gpointer /*data*/)
 156 {
 157   GtkWidget *app = newSample("Sample.txt");
 158
 159   gtk_widget_show_all(app);
 160 }
 161
 162 void closeapp(GtkWidget */*widget*/, gpointer data)
 163 {
 164   GtkWidget *app = GTK_WIDGET(data);
 165
 166   closeSample(app);
 167 }
 168
 169 void shutdown(GtkObject */*object*/, gpointer /*data*/)
 170 {
 171     gtk_main_quit();
 172 }
 173
 174 GnomeUIInfo fileMenu[] =
 175 {
 176   GNOMEUIINFO_MENU_NEW_ITEM((gchar *) "_New Sample",
 177                             (gchar *) "Create a new Gnome Layout Sample",
 178                             newapp, NULL),
 179
 180   GNOMEUIINFO_MENU_OPEN_ITEM(openfile, NULL),
 181   GNOMEUIINFO_SEPARATOR,
 182   GNOMEUIINFO_MENU_CLOSE_ITEM(closeapp, NULL),
 183   GNOMEUIINFO_MENU_EXIT_ITEM(shutdown, NULL),
 184   GNOMEUIINFO_END
 185 };
 186
 187 GnomeUIInfo helpMenu[] =
 188 {
 189     // GNOMEUIINFO_HELP("gnomelayout"),
 190     GNOMEUIINFO_MENU_ABOUT_ITEM(showabout, NULL),
 191     GNOMEUIINFO_END
 192 };
 193
 194 GnomeUIInfo mainMenu[] =
 195 {
 196     GNOMEUIINFO_SUBTREE(N_((gchar *) "File"), fileMenu),
 197     GNOMEUIINFO_SUBTREE(N_((gchar *) "Help"), helpMenu),
 198     GNOMEUIINFO_END
 199 };
 200
 201 gint eventDelete(GtkWidget *widget, GdkEvent */*event*/, gpointer /*data*/)
 202 {
 203   closeSample(widget);
 204
 205   // indicate that closeapp  already destroyed the window
 206   return TRUE;
 207 }
 208
 209 gint eventConfigure(GtkWidget */*widget*/, GdkEventConfigure *event, Context *context)
 210 {
 211   if (context->paragraph != NULL) {
 212     context->width  = event->width;
 213     context->height = event->height;
 214
 215     if (context->width > 0 && context->height > 0) {
 216         context->paragraph->breakLines(context->width, context->height);
 217     }
 218   }
 219
 220   return TRUE;
 221 }
 222
 223 gint eventExpose(GtkWidget *widget, GdkEvent */*event*/, Context *context)
 224 {
 225   if (context->paragraph != NULL) {
 226     gint maxLines = context->paragraph->getLineCount() - 1;
 227     gint firstLine = 0, lastLine = context->height / context->paragraph->getLineHeight();
 228     GnomeSurface surface(widget);
 229
 230     context->paragraph->draw(&surface, firstLine, (maxLines < lastLine)? maxLines : lastLine);
 231   }
 232
 233   return TRUE;
 234 }
 235
 236 GtkWidget *newSample(const gchar *fileName)
 237 {
 238   Context   *context = new Context();
 239
 240   context->width  = 600;
 241   context->height = 400;
 242   context->paragraph = Paragraph::paragraphFactory(fileName, font, guiSupport);
 243
 244   gchar *title = prettyTitle(fileName);
 245   GtkWidget *app = gnome_app_new("gnomeLayout", title);
 246
 247   gtk_object_set_data(GTK_OBJECT(app), "context", context);
 248
 249   gtk_window_set_default_size(GTK_WINDOW(app), 600 - 24, 400);
 250
 251   gnome_app_create_menus_with_data(GNOME_APP(app), mainMenu, app);
 252
 253   gtk_signal_connect(GTK_OBJECT(app), "delete_event",
 254                      GTK_SIGNAL_FUNC(eventDelete), NULL);
 255
 256   GtkWidget *area = gtk_drawing_area_new();
 257   gtk_object_set_data(GTK_OBJECT(app), "area", area);
 258
 259   GtkStyle *style = gtk_style_copy(gtk_widget_get_style(area));
 260
 261   for (int i = 0; i < 5; i += 1) {
 262     style->fg[i] = style->white;
 263   }
 264
 265   gtk_widget_set_style(area, style);
 266
 267   gnome_app_set_contents(GNOME_APP(app), area);
 268
 269   gtk_signal_connect(GTK_OBJECT(area),
 270                      "expose_event",
 271                      GTK_SIGNAL_FUNC(eventExpose),
 272                      context);
 273
 274   gtk_signal_connect(GTK_OBJECT(area),
 275                      "configure_event",
 276                      GTK_SIGNAL_FUNC(eventConfigure),
 277                      context);
 278
 279   appList = g_slist_prepend(appList, app);
 280
 281   g_free(title);
 282
 283   return app;
 284 }
 285
 286 void closeSample(GtkWidget *app)
 287 {
 288   Context *context = (Context *) gtk_object_get_data(GTK_OBJECT(app), "context");
 289
 290   if (context->paragraph != NULL) {
 291     delete context->paragraph;
 292   }
 293
 294   delete context;
 295
 296   appList = g_slist_remove(appList, app);
 297
 298   gtk_widget_destroy(app);
 299
 300   if (appList == NULL) {
 301     gtk_main_quit();
 302   }
 303 }
 304
 305 int main (int argc, char *argv[])
 306 {
 307     LEErrorCode   fontStatus = LE_NO_ERROR;
 308     poptContext   ptctx;
 309     GtkWidget    *app;
 310
 311     FT_Init_FreeType(&engine);
 312
 313     gnome_init_with_popt_table("gnomelayout", "0.1", argc, argv, NULL, 0, &ptctx);
 314
 315     guiSupport = new GnomeGUISupport();
 316     fontMap    = new GnomeFontMap(engine, "FontMap.Gnome", 24, guiSupport, fontStatus);
 317     font       = new ScriptCompositeFontInstance(fontMap);
 318
 319     if (LE_FAILURE(fontStatus)) {
 320         FT_Done_FreeType(engine);
 321         return 1;
 322     }
 323
 324     const char  *defaultArgs[] = {"Sample.txt", NULL};
 325     const char **args = poptGetArgs(ptctx);
 326
 327     if (args == NULL) {
 328         args = defaultArgs;
 329     }
 330
 331     for (int i = 0; args[i] != NULL; i += 1) {
 332        app = newSample(args[i]);
 333
 334        gtk_widget_show_all(app);
 335     }
 336
 337     poptFreeContext(ptctx);
 338
 339     gtk_main();
 340
 341     delete font;
 342     delete guiSupport;
 343
 344     FT_Done_FreeType(engine);
 345
 346     exit(0);
 347 }