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 *   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
39struct Context
40{
41    long width;
42    long height;
43    Paragraph *paragraph;
44};
45
46static FT_Library engine;
47static GnomeGUISupport *guiSupport;
48static GnomeFontMap *fontMap;
49static ScriptCompositeFontInstance *font;
50
51static GSList *appList = NULL;
52
53GtkWidget *newSample(const gchar *fileName);
54void       closeSample(GtkWidget *sample);
55
56void 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
77void notimpl(GtkObject */*object*/, gpointer /*data*/)
78{
79    gnome_ok_dialog("Not implemented...");
80}
81
82gchar *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
90void 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
123void 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
155void newapp(GtkObject */*object*/, gpointer /*data*/)
156{
157  GtkWidget *app = newSample("Sample.txt");
158
159  gtk_widget_show_all(app);
160}
161
162void closeapp(GtkWidget */*widget*/, gpointer data)
163{
164  GtkWidget *app = GTK_WIDGET(data);
165
166  closeSample(app);
167}
168
169void shutdown(GtkObject */*object*/, gpointer /*data*/)
170{
171    gtk_main_quit();
172}
173
174GnomeUIInfo 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
187GnomeUIInfo helpMenu[] =
188{
189    // GNOMEUIINFO_HELP("gnomelayout"),
190    GNOMEUIINFO_MENU_ABOUT_ITEM(showabout, NULL),
191    GNOMEUIINFO_END
192};
193
194GnomeUIInfo mainMenu[] =
195{
196    GNOMEUIINFO_SUBTREE(N_((gchar *) "File"), fileMenu),
197    GNOMEUIINFO_SUBTREE(N_((gchar *) "Help"), helpMenu),
198    GNOMEUIINFO_END
199};
200
201gint 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
209gint 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
223gint 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
236GtkWidget *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
286void 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
305int 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}
348