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