348 lines
8.5 KiB
C++
348 lines
8.5 KiB
C++
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/*
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*******************************************************************************
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*
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* © 2016 and later: Unicode, Inc. and others.
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* License & terms of use: http://www.unicode.org/copyright.html#License
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*
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*******************************************************************************
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****************************************************************************** *
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*
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* Copyright (C) 1999-2007, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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****************************************************************************** *
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* file name: gnomelayout.cpp
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*
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* created on: 09/04/2001
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* created by: Eric R. Mader
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*/
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#include <gnome.h>
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#include <ft2build.h>
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#include FT_FREETYPE_H
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#include "unicode/ustring.h"
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#include "unicode/uscript.h"
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#include "GnomeFontInstance.h"
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#include "paragraph.h"
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#include "GnomeGUISupport.h"
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#include "GnomeFontMap.h"
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#include "UnicodeReader.h"
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#include "ScriptCompositeFontInstance.h"
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#define ARRAY_LENGTH(array) (sizeof array / sizeof array[0])
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struct Context
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{
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long width;
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long height;
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Paragraph *paragraph;
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};
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static FT_Library engine;
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static GnomeGUISupport *guiSupport;
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static GnomeFontMap *fontMap;
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static ScriptCompositeFontInstance *font;
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static GSList *appList = NULL;
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GtkWidget *newSample(const gchar *fileName);
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void closeSample(GtkWidget *sample);
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void showabout(GtkWidget */*widget*/, gpointer /*data*/)
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{
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GtkWidget *aboutBox;
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const gchar *documentedBy[] = {NULL};
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const gchar *writtenBy[] = {
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"Eric Mader",
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NULL
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};
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aboutBox = gnome_about_new("Gnome Layout Sample",
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"0.1",
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"Copyright (C) 1998-2006 By International Business Machines Corporation and others. All Rights Reserved.",
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"A simple demo of the ICU LayoutEngine.",
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writtenBy,
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documentedBy,
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"",
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NULL);
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gtk_widget_show(aboutBox);
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}
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void notimpl(GtkObject */*object*/, gpointer /*data*/)
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{
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gnome_ok_dialog("Not implemented...");
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}
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gchar *prettyTitle(const gchar *path)
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{
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const gchar *name = g_basename(path);
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gchar *title = g_strconcat("Gnome Layout Sample - ", name, NULL);
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return title;
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}
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void openOK(GtkObject */*object*/, gpointer data)
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{
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GtkFileSelection *fileselection = GTK_FILE_SELECTION(data);
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GtkWidget *app = GTK_WIDGET(gtk_object_get_data(GTK_OBJECT(fileselection), "app"));
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Context *context = (Context *) gtk_object_get_data(GTK_OBJECT(app), "context");
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gchar *fileName = g_strdup(gtk_file_selection_get_filename(fileselection));
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Paragraph *newPara;
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gtk_widget_destroy(GTK_WIDGET(fileselection));
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newPara = Paragraph::paragraphFactory(fileName, font, guiSupport);
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if (newPara != NULL) {
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gchar *title = prettyTitle(fileName);
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GtkWidget *area = GTK_WIDGET(gtk_object_get_data(GTK_OBJECT(app), "area"));
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if (context->paragraph != NULL) {
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delete context->paragraph;
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}
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context->paragraph = newPara;
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gtk_window_set_title(GTK_WINDOW(app), title);
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gtk_widget_hide(area);
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context->paragraph->breakLines(context->width, context->height);
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gtk_widget_show_all(area);
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g_free(title);
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}
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g_free(fileName);
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}
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void openfile(GtkObject */*object*/, gpointer data)
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{
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GtkWidget *app = GTK_WIDGET(data);
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GtkWidget *fileselection;
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GtkWidget *okButton;
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GtkWidget *cancelButton;
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fileselection =
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gtk_file_selection_new("Open File");
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gtk_object_set_data(GTK_OBJECT(fileselection), "app", app);
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okButton =
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GTK_FILE_SELECTION(fileselection)->ok_button;
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cancelButton =
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GTK_FILE_SELECTION(fileselection)->cancel_button;
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gtk_signal_connect(GTK_OBJECT(fileselection), "destroy",
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GTK_SIGNAL_FUNC(gtk_main_quit), NULL);
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gtk_signal_connect(GTK_OBJECT(okButton), "clicked",
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GTK_SIGNAL_FUNC(openOK), fileselection);
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gtk_signal_connect_object(GTK_OBJECT(cancelButton), "clicked",
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GTK_SIGNAL_FUNC(gtk_widget_destroy), GTK_OBJECT(fileselection));
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gtk_window_set_modal(GTK_WINDOW(fileselection), TRUE);
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gtk_widget_show(fileselection);
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gtk_main();
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}
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void newapp(GtkObject */*object*/, gpointer /*data*/)
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{
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GtkWidget *app = newSample("Sample.txt");
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gtk_widget_show_all(app);
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}
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void closeapp(GtkWidget */*widget*/, gpointer data)
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{
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GtkWidget *app = GTK_WIDGET(data);
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closeSample(app);
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}
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void shutdown(GtkObject */*object*/, gpointer /*data*/)
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{
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gtk_main_quit();
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}
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GnomeUIInfo fileMenu[] =
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{
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GNOMEUIINFO_MENU_NEW_ITEM((gchar *) "_New Sample",
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(gchar *) "Create a new Gnome Layout Sample",
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newapp, NULL),
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GNOMEUIINFO_MENU_OPEN_ITEM(openfile, NULL),
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GNOMEUIINFO_SEPARATOR,
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GNOMEUIINFO_MENU_CLOSE_ITEM(closeapp, NULL),
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GNOMEUIINFO_MENU_EXIT_ITEM(shutdown, NULL),
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GNOMEUIINFO_END
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};
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GnomeUIInfo helpMenu[] =
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{
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// GNOMEUIINFO_HELP("gnomelayout"),
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GNOMEUIINFO_MENU_ABOUT_ITEM(showabout, NULL),
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GNOMEUIINFO_END
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};
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GnomeUIInfo mainMenu[] =
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{
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GNOMEUIINFO_SUBTREE(N_((gchar *) "File"), fileMenu),
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GNOMEUIINFO_SUBTREE(N_((gchar *) "Help"), helpMenu),
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GNOMEUIINFO_END
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};
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gint eventDelete(GtkWidget *widget, GdkEvent */*event*/, gpointer /*data*/)
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{
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closeSample(widget);
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// indicate that closeapp already destroyed the window
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return TRUE;
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}
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gint eventConfigure(GtkWidget */*widget*/, GdkEventConfigure *event, Context *context)
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{
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if (context->paragraph != NULL) {
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context->width = event->width;
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context->height = event->height;
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if (context->width > 0 && context->height > 0) {
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context->paragraph->breakLines(context->width, context->height);
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}
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}
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return TRUE;
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}
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gint eventExpose(GtkWidget *widget, GdkEvent */*event*/, Context *context)
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{
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if (context->paragraph != NULL) {
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gint maxLines = context->paragraph->getLineCount() - 1;
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gint firstLine = 0, lastLine = context->height / context->paragraph->getLineHeight();
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GnomeSurface surface(widget);
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context->paragraph->draw(&surface, firstLine, (maxLines < lastLine)? maxLines : lastLine);
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}
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return TRUE;
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}
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GtkWidget *newSample(const gchar *fileName)
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{
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Context *context = new Context();
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context->width = 600;
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context->height = 400;
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context->paragraph = Paragraph::paragraphFactory(fileName, font, guiSupport);
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gchar *title = prettyTitle(fileName);
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GtkWidget *app = gnome_app_new("gnomeLayout", title);
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gtk_object_set_data(GTK_OBJECT(app), "context", context);
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gtk_window_set_default_size(GTK_WINDOW(app), 600 - 24, 400);
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gnome_app_create_menus_with_data(GNOME_APP(app), mainMenu, app);
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gtk_signal_connect(GTK_OBJECT(app), "delete_event",
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GTK_SIGNAL_FUNC(eventDelete), NULL);
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GtkWidget *area = gtk_drawing_area_new();
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gtk_object_set_data(GTK_OBJECT(app), "area", area);
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GtkStyle *style = gtk_style_copy(gtk_widget_get_style(area));
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for (int i = 0; i < 5; i += 1) {
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style->fg[i] = style->white;
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}
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gtk_widget_set_style(area, style);
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gnome_app_set_contents(GNOME_APP(app), area);
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gtk_signal_connect(GTK_OBJECT(area),
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"expose_event",
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GTK_SIGNAL_FUNC(eventExpose),
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context);
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gtk_signal_connect(GTK_OBJECT(area),
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"configure_event",
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GTK_SIGNAL_FUNC(eventConfigure),
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context);
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appList = g_slist_prepend(appList, app);
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g_free(title);
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return app;
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}
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void closeSample(GtkWidget *app)
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{
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Context *context = (Context *) gtk_object_get_data(GTK_OBJECT(app), "context");
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if (context->paragraph != NULL) {
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delete context->paragraph;
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}
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delete context;
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appList = g_slist_remove(appList, app);
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gtk_widget_destroy(app);
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if (appList == NULL) {
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gtk_main_quit();
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}
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}
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int main (int argc, char *argv[])
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{
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LEErrorCode fontStatus = LE_NO_ERROR;
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poptContext ptctx;
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GtkWidget *app;
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FT_Init_FreeType(&engine);
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gnome_init_with_popt_table("gnomelayout", "0.1", argc, argv, NULL, 0, &ptctx);
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guiSupport = new GnomeGUISupport();
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fontMap = new GnomeFontMap(engine, "FontMap.Gnome", 24, guiSupport, fontStatus);
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font = new ScriptCompositeFontInstance(fontMap);
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if (LE_FAILURE(fontStatus)) {
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FT_Done_FreeType(engine);
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return 1;
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}
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const char *defaultArgs[] = {"Sample.txt", NULL};
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const char **args = poptGetArgs(ptctx);
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if (args == NULL) {
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args = defaultArgs;
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}
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for (int i = 0; args[i] != NULL; i += 1) {
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app = newSample(args[i]);
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gtk_widget_show_all(app);
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}
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poptFreeContext(ptctx);
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gtk_main();
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delete font;
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delete guiSupport;
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FT_Done_FreeType(engine);
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exit(0);
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}
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