source/samples/layout/cgnomelayout.c

   1
   2 /*
   3  *******************************************************************************
   4  *
   5  *   Copyright (C) 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  */
  16
  17 #include <gnome.h>
  18 #include <ft2build.h>
  19 #include FT_FREETYPE_H
  20
  21 #include "pflow.h"
  22
  23 #include "gnomeglue.h"
  24
  25 #include "arraymem.h"
  26
  27 struct Context
  28 {
  29     long width;
  30     long height;
  31     pf_flow *paragraph;
  32 };
  33
  34 typedef struct Context Context;
  35
  36 static FT_Library engine;
  37 static gs_guiSupport *guiSupport;
  38 static fm_fontMap *fontMap;
  39 static le_font *font;
  40
  41 static GSList *appList = NULL;
  42
  43 GtkWidget *newSample(const gchar *fileName);
  44 void       closeSample(GtkWidget *sample);
  45
  46 static void showabout(GtkWidget *widget, gpointer data)
  47 {
  48     GtkWidget *aboutBox;
  49     const gchar *documentedBy[] = {NULL};
  50     const gchar *writtenBy[] = {
  51         "Eric Mader",
  52         NULL
  53     };
  54
  55     aboutBox = gnome_about_new("Gnome Layout Sample",
  56                                "0.1",
  57                                "Copyright (C) 1998-2006 By International Business Machines Corporation and others. All Rights Reserved.",
  58                                "A simple demo of the ICU LayoutEngine.",
  59                                writtenBy,
  60                                documentedBy,
  61                                "",
  62                                NULL);
  63
  64     gtk_widget_show(aboutBox);
  65 }
  66
  67 #if 0
  68 static void notimpl(GtkObject *object, gpointer data)
  69 {
  70     gnome_ok_dialog("Not implemented...");
  71 }
  72 #endif
  73
  74 static gchar *prettyTitle(const gchar *path)
  75 {
  76   const gchar *name  = g_basename(path);
  77   gchar *title = g_strconcat("Gnome Layout Sample - ", name, NULL);
  78
  79   return title;
  80 }
  81
  82 static void openOK(GtkObject *object, gpointer data)
  83 {
  84   GtkFileSelection *fileselection = GTK_FILE_SELECTION(data);
  85   GtkWidget *app = GTK_WIDGET(gtk_object_get_data(GTK_OBJECT(fileselection), "app"));
  86   Context *context = (Context *) gtk_object_get_data(GTK_OBJECT(app), "context");
  87   gchar *fileName  = g_strdup(gtk_file_selection_get_filename(fileselection));
  88   pf_flow *newPara;
  89
  90   gtk_widget_destroy(GTK_WIDGET(fileselection));
  91
  92   newPara = pf_factory(fileName, font, guiSupport);
  93
  94   if (newPara != NULL) {
  95     gchar *title = prettyTitle(fileName);
  96     GtkWidget *area = GTK_WIDGET(gtk_object_get_data(GTK_OBJECT(app), "area"));
  97
  98     if (context->paragraph != NULL) {
  99       pf_close(context->paragraph);
 100     }
 101
 102     context->paragraph = newPara;
 103     gtk_window_set_title(GTK_WINDOW(app), title);
 104
 105     gtk_widget_hide(area);
 106     pf_breakLines(context->paragraph, context->width, context->height);
 107     gtk_widget_show_all(area);
 108
 109     g_free(title);
 110   }
 111
 112   g_free(fileName);
 113 }
 114
 115 static void openfile(GtkObject *object, gpointer data)
 116 {
 117   GtkWidget *app = GTK_WIDGET(data);
 118   GtkWidget *fileselection;
 119   GtkWidget *okButton;
 120   GtkWidget *cancelButton;
 121
 122   fileselection =
 123     gtk_file_selection_new("Open File");
 124
 125   gtk_object_set_data(GTK_OBJECT(fileselection), "app", app);
 126
 127   okButton =
 128     GTK_FILE_SELECTION(fileselection)->ok_button;
 129
 130   cancelButton =
 131     GTK_FILE_SELECTION(fileselection)->cancel_button;
 132
 133   gtk_signal_connect(GTK_OBJECT(fileselection), "destroy",
 134              GTK_SIGNAL_FUNC(gtk_main_quit), NULL);
 135
 136   gtk_signal_connect(GTK_OBJECT(okButton), "clicked",
 137              GTK_SIGNAL_FUNC(openOK), fileselection);
 138
 139   gtk_signal_connect_object(GTK_OBJECT(cancelButton), "clicked",
 140              GTK_SIGNAL_FUNC(gtk_widget_destroy), GTK_OBJECT(fileselection));
 141
 142   gtk_window_set_modal(GTK_WINDOW(fileselection), TRUE);
 143   gtk_widget_show(fileselection);
 144   gtk_main();
 145 }
 146
 147 static void newapp(GtkObject *object, gpointer data)
 148 {
 149   GtkWidget *app = newSample("Sample.txt");
 150
 151   gtk_widget_show_all(app);
 152 }
 153
 154 static void closeapp(GtkWidget *widget, gpointer data)
 155 {
 156   GtkWidget *app = GTK_WIDGET(data);
 157
 158   closeSample(app);
 159 }
 160
 161 static void shutdown(GtkObject *object, gpointer data)
 162 {
 163     gtk_main_quit();
 164 }
 165
 166 GnomeUIInfo fileMenu[] =
 167 {
 168   GNOMEUIINFO_MENU_NEW_ITEM((gchar *) "_New Sample",
 169                 (gchar *) "Create a new Gnome Layout Sample",
 170                 newapp, NULL),
 171
 172   GNOMEUIINFO_MENU_OPEN_ITEM(openfile, NULL),
 173   GNOMEUIINFO_SEPARATOR,
 174   GNOMEUIINFO_MENU_CLOSE_ITEM(closeapp, NULL),
 175   GNOMEUIINFO_MENU_EXIT_ITEM(shutdown, NULL),
 176   GNOMEUIINFO_END
 177 };
 178
 179 GnomeUIInfo helpMenu[] =
 180 {
 181     /* GNOMEUIINFO_HELP("gnomelayout"), */
 182     GNOMEUIINFO_MENU_ABOUT_ITEM(showabout, NULL),
 183     GNOMEUIINFO_END
 184 };
 185
 186 GnomeUIInfo mainMenu[] =
 187 {
 188     GNOMEUIINFO_SUBTREE(N_((gchar *) "File"), fileMenu),
 189     GNOMEUIINFO_SUBTREE(N_((gchar *) "Help"), helpMenu),
 190     GNOMEUIINFO_END
 191 };
 192
 193 static gint eventDelete(GtkWidget *widget, GdkEvent *event, gpointer data)
 194 {
 195   closeSample(widget);
 196
 197   /* indicate that closeapp  already destroyed the window */
 198   return TRUE;
 199 }
 200
 201 static gint eventConfigure(GtkWidget *widget, GdkEventConfigure *event, Context *context)
 202 {
 203   if (context->paragraph != NULL) {
 204     context->width  = event->width;
 205     context->height = event->height;
 206
 207     if (context->width > 0 && context->height > 0) {
 208         pf_breakLines(context->paragraph, context->width, context->height);
 209     }
 210   }
 211
 212   return TRUE;
 213 }
 214
 215 static gint eventExpose(GtkWidget *widget, GdkEvent *event, Context *context)
 216 {
 217   if (context->paragraph != NULL) {
 218     gint maxLines = pf_getLineCount(context->paragraph) - 1;
 219     gint firstLine = 0, lastLine = context->height / pf_getLineHeight(context->paragraph);
 220     rs_surface *surface = rs_gnomeRenderingSurfaceOpen(widget);
 221
 222     pf_draw(context->paragraph, surface, firstLine, (maxLines < lastLine)? maxLines : lastLine);
 223
 224     rs_gnomeRenderingSurfaceClose(surface);
 225   }
 226
 227   return TRUE;
 228 }
 229
 230 GtkWidget *newSample(const gchar *fileName)
 231 {
 232   Context *context = NEW_ARRAY(Context, 1);
 233   gchar *title;
 234   GtkWidget *app;
 235   GtkWidget *area;
 236   GtkStyle *style;
 237   int i;
 238
 239   context->width  = 600;
 240   context->height = 400;
 241   context->paragraph = pf_factory(fileName, font, guiSupport);
 242
 243   title = prettyTitle(fileName);
 244   app = gnome_app_new("gnomeLayout", title);
 245
 246   gtk_object_set_data(GTK_OBJECT(app), "context", context);
 247
 248   gtk_window_set_default_size(GTK_WINDOW(app), 600 - 24, 400);
 249
 250   gnome_app_create_menus_with_data(GNOME_APP(app), mainMenu, app);
 251
 252   gtk_signal_connect(GTK_OBJECT(app), "delete_event",
 253              GTK_SIGNAL_FUNC(eventDelete), NULL);
 254
 255   area = gtk_drawing_area_new();
 256   gtk_object_set_data(GTK_OBJECT(app), "area", area);
 257
 258   style = gtk_style_copy(gtk_widget_get_style(area));
 259
 260   for (i = 0; i < 5; i += 1) {
 261     style->fg[i] = style->white;
 262   }
 263
 264   gtk_widget_set_style(area, style);
 265
 266   gnome_app_set_contents(GNOME_APP(app), area);
 267
 268   gtk_signal_connect(GTK_OBJECT(area),
 269              "expose_event",
 270              GTK_SIGNAL_FUNC(eventExpose),
 271              context);
 272
 273   gtk_signal_connect(GTK_OBJECT(area),
 274              "configure_event",
 275              GTK_SIGNAL_FUNC(eventConfigure),
 276              context);
 277
 278   appList = g_slist_prepend(appList, app);
 279
 280   g_free(title);
 281
 282   return app;
 283 }
 284
 285 void closeSample(GtkWidget *app)
 286 {
 287   Context *context = (Context *) gtk_object_get_data(GTK_OBJECT(app), "context");
 288
 289   if (context->paragraph != NULL) {
 290     pf_close(context->paragraph);
 291   }
 292
 293   DELETE_ARRAY(context);
 294
 295   appList = g_slist_remove(appList, app);
 296
 297   gtk_widget_destroy(app);
 298
 299   if (appList == NULL) {
 300     gtk_main_quit();
 301   }
 302 }
 303
 304 int main (int argc, char *argv[])
 305 {
 306     LEErrorCode   fontStatus = LE_NO_ERROR;
 307     poptContext   ptctx;
 308     GtkWidget    *app;
 309     const char   *defaultArgs[] = {"Sample.txt", NULL};
 310     const char  **args;
 311     int i;
 312
 313     FT_Init_FreeType(&engine);
 314
 315     gnome_init_with_popt_table("gnomelayout", "0.1", argc, argv, NULL, 0, &ptctx);
 316
 317     guiSupport = gs_gnomeGuiSupportOpen();
 318     fontMap    = fm_gnomeFontMapOpen(engine, "FontMap.Gnome", 24, guiSupport, &fontStatus);
 319     font       = le_scriptCompositeFontOpen(fontMap);
 320
 321     if (LE_FAILURE(fontStatus)) {
 322         FT_Done_FreeType(engine);
 323         return 1;
 324     }
 325
 326     args = poptGetArgs(ptctx);
 327
 328     if (args == NULL) {
 329         args = defaultArgs;
 330     }
 331
 332     for (i = 0; args[i] != NULL; i += 1) {
 333        app = newSample(args[i]);
 334
 335        gtk_widget_show_all(app);
 336     }
 337
 338     poptFreeContext(ptctx);
 339
 340     gtk_main();
 341
 342     le_fontClose(font);
 343     gs_gnomeGuiSupportClose(guiSupport);
 344
 345     FT_Done_FreeType(engine);
 346
 347     exit(0);
 348 }