New upstream version 4.3.0upstream/4.3.0

1 files changed, 403 insertions, 0 deletions

diff --git a/app/wlib/gtklib/font.c b/app/wlib/gtklib/font.c
new file mode 100644
index 0000000..c54f7de
--- /dev/null
+++ b/app/wlib/gtklib/font.c
@@ -0,0 +1,403 @@
+/** \file font.c
+ * Font selection and loading.
+ */
+
+/*  XTrkCad - Model Railroad CAD
+ *  Copyright (C) 2005 Dave Bullis
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <stdlib.h>
+#ifdef HAVE_MALLOC_H
+#include <malloc.h>
+#endif
+
+#define GTK_DISABLE_SINGLE_INCLUDES
+#define GDK_DISABLE_DEPRECATED
+#define GTK_DISABLE_DEPRECATED
+#define GSEAL_ENABLE
+
+#include <gtk/gtk.h>
+#include <gdk/gdk.h>
+
+#include "wlib.h"
+#include "gtkint.h"
+#include "i18n.h"
+
+/*
+ * Macro for debug purposes. Possible debug macro values:
+ *
+ *   0 - no messages to console (use this value when building in release mode)
+ *   1 - send errors
+ *   2 - send details
+ *   3 - send more details
+ */
+#define WLIB_FONT_DEBUG 0
+
+static gchar sampleText[] = "AbCdE0129!@$&()[]{}";
+
+static GtkWidget *fontSelectionDialog;
+
+
+/*****************************************************************************
+ * FONT HANDLERS
+ */
+
+#define FW_MEDIUM	(0)
+#define FW_BOLD		(1)
+#define FS_REGULAR	(0)
+#define FS_ITALIC	(1)
+
+/* absoluteFontSize was introduced to keep the font size information synchron
+ * between the Dt.size of ctext.c and it's drop list on the status bar and
+ * the font size coming from the gtk font dialog which is located in this file */
+int absoluteFontSize = 18;
+
+struct wFont_t {
+    PangoFontDescription *fontDescription;
+};
+
+static wFont_p standardFonts[F_HELV-F_TIMES+1][2][2];
+static wFont_p curFont = NULL;
+
+/**
+ * Callback for font selection dialog
+ *
+ * \param fontSelectionDialog IN dialog
+ * \param response IN response code from dialog
+ * \param data IN unused
+ * \return
+ */
+
+static void fontSelectionDialogCallback(GtkFontSelectionDialog
+                                        *fontSelectionDialog, gint response, gpointer data)
+{
+    if (response == GTK_RESPONSE_APPLY || response == GTK_RESPONSE_OK) {
+		gchar *fontName;
+
+        fontName = gtk_font_selection_dialog_get_font_name(fontSelectionDialog);
+        wPrefSetString("font", "name", fontName);
+        pango_font_description_free(curFont->fontDescription);
+        curFont->fontDescription = pango_font_description_from_string(fontName);
+        absoluteFontSize = (pango_font_description_get_size(
+                                curFont->fontDescription))/PANGO_SCALE;
+#if WLIB_FONT_DEBUG >= 2
+        fprintf(stderr, "new font selection:\n");
+        fprintf(stderr, "  font name \"%s\"\n", fontName);
+        fprintf(stderr, "  font size is %d\n",
+                pango_font_description_get_size(curFont->fontDescription)/PANGO_SCALE);
+        fprintf(stderr, "  font size is absolute %d\n",
+                pango_font_description_get_size_is_absolute(curFont->fontDescription));
+#endif
+        g_free(fontName);
+    }
+
+    if (response == GTK_RESPONSE_OK || response == GTK_RESPONSE_CANCEL) {
+        gtk_widget_hide(GTK_WIDGET(fontSelectionDialog));
+    }
+}
+
+static wBool_t fontInitted = FALSE;
+
+static wBool_t fontInit()
+{
+    const char *fontNames[] = {
+        "times 18",
+        "times italic 18",
+        "times bold 18",
+        "times bold italic 18",
+        "helvetica 18",
+        "helvetica oblique 18",
+        "helvetica bold 18",
+        "helvetica bold oblique 18",
+    };
+    int s = 0;
+    int i, j, k;
+
+    for (i = F_TIMES; i <= F_HELV; ++i) {
+        for (j = FW_MEDIUM; j <= FW_BOLD; ++j) {
+            for (k = FS_REGULAR; k <= FS_ITALIC; ++k) {
+                PangoFontDescription *fontDescription = pango_font_description_from_string(
+                        fontNames[s++]);
+                wFont_p standardFont = (wFont_p) malloc(sizeof(struct wFont_t));
+                standardFont->fontDescription = fontDescription;
+                standardFonts[i-F_TIMES][j][k] = standardFont;
+            }
+        }
+    }
+
+    if (curFont == NULL) {
+        curFont = (wFont_p) malloc(sizeof(struct wFont_t));
+
+        if (curFont == NULL) {
+            return FALSE;
+        }
+
+        const char *fontName = wPrefGetString("font", "name");
+        curFont->fontDescription = pango_font_description_from_string(
+                                       fontName ? fontName : "helvetica 18");
+        absoluteFontSize = (int) PANGO_PIXELS(pango_font_description_get_size(
+                curFont->fontDescription));
+    }
+
+    fontInitted = TRUE;
+    return TRUE;
+}
+
+
+static double fontFactor = 1.0;
+
+#define FONTSIZE_TO_PANGOSIZE(fs) ((gint) ((fs) * (fontFactor) + .5))
+
+/**
+ * Create a Pango layout with a specified font and font size
+ *
+ * \param widget IN
+ * \param cairo IN cairo context
+ * \param fp IN font
+ * \param fs IN size
+ * \param s IN ???
+ * \param width_p OUT width of layout
+ * \param height_p OUT height of layout
+ * \param ascent_p OUT ascent of layout
+ * \param descent_p OUT descent of layout
+ * \return    the created Pango layout
+ */
+
+PangoLayout *wlibFontCreatePangoLayout(GtkWidget *widget,
+                                       void *cairo,
+                                       wFont_p fp,
+                                       wFontSize_t fs,
+                                       const char *s,
+                                       int *width_p,
+                                       int *height_p,
+                                       int *ascent_p,
+                                       int *descent_p)
+{
+    if (!fontInitted) {
+        fontInit();
+    }
+
+    PangoLayout *layout = NULL;
+    gchar *utf8 = wlibConvertInput(s);
+    /* RPH -- pango_cairo_create_layout() is missing in CentOS 4.8.
+              CentOS 4.8 only has GTK 2.4.13 and Pango 1.6.0 and does not have
+              libpangocairo at all.
+              pango_cairo_create_layout() was introduced with Pango 1.10. */
+#if PANGO_VERSION_MAJOR >= 1 && PANGO_VERSION_MINOR >= 10
+
+    if (cairo != NULL) {
+        layout = pango_cairo_create_layout((cairo_t *) cairo);
+        pango_layout_set_text(layout, utf8, -1);
+    } else
+#endif
+        layout = gtk_widget_create_pango_layout(widget, utf8);
+
+    PangoFontDescription *fontDescription = (fp ? fp : curFont)->fontDescription;
+    PangoContext *context;
+    PangoFontMetrics *metrics;
+    /* set attributes */
+    pango_font_description_set_size(fontDescription,
+                                    FONTSIZE_TO_PANGOSIZE(fs) * PANGO_SCALE);
+    pango_layout_set_font_description(layout, fontDescription);
+    /* get layout measures */
+    pango_layout_get_pixel_size(layout, width_p, height_p);
+    context = gtk_widget_get_pango_context(widget);
+    metrics = pango_context_get_metrics(context, fontDescription,
+                                        pango_context_get_language(context));
+    *ascent_p  = PANGO_PIXELS(pango_font_metrics_get_ascent(metrics));
+    *descent_p = PANGO_PIXELS(pango_font_metrics_get_descent(metrics));
+    pango_font_metrics_unref(metrics);
+#if WLIB_FONT_DEBUG >= 3
+    fprintf(stderr, "font layout created:\n");
+    fprintf(stderr, "  widget:         %p\n", widget);
+    //fprintf(stderr, "  font description:%p\n", fp);
+    fprintf(stderr, "  font size:      %f\n", fs);
+    fprintf(stderr, "  layout text:    \"%s\" (utf8)\n", utf8);
+    fprintf(stderr, "  layout width:   %d\n", *width_p);
+    fprintf(stderr, "  layout height:  %d\n", *height_p);
+    fprintf(stderr, "  layout ascent:  %d (pixels)\n", *ascent_p);
+    fprintf(stderr, "  layout descent: %d (pixels)\n", *descent_p);
+#endif
+    return layout;
+}
+
+/**
+ * Destroy a previously allocated  Pango layout
+ * \return
+ */
+
+void wlibFontDestroyPangoLayout(PangoLayout *layout)
+{
+    g_object_unref(G_OBJECT(layout));
+}
+
+/**
+ * Initialize font data
+ * \return
+ */
+
+void wInitializeFonts()
+{
+    if (!fontInitted) {
+        fontInit();
+    }
+}
+
+/**
+ * Initialize and run the font dialog
+ *
+ * \param title IN dialog box title
+ * \return
+ */
+
+void wSelectFont(
+    const char * title)
+{
+    if (!fontInitted) {
+        fontInit();
+    }
+
+    if (fontSelectionDialog == NULL) {
+        fontSelectionDialog = gtk_font_selection_dialog_new(_("Font Select"));
+        gtk_window_set_position(GTK_WINDOW(fontSelectionDialog), GTK_WIN_POS_MOUSE);
+        gtk_window_set_modal(GTK_WINDOW(fontSelectionDialog), TRUE);
+        gtk_font_selection_dialog_set_preview_text(GTK_FONT_SELECTION_DIALOG(
+                    fontSelectionDialog), sampleText);
+        g_signal_connect(G_OBJECT(fontSelectionDialog), "response",
+                         G_CALLBACK(fontSelectionDialogCallback), NULL);
+        g_signal_connect(G_OBJECT(fontSelectionDialog), "destroy",
+                         G_CALLBACK(gtk_widget_destroyed), &fontSelectionDialog);
+    }
+
+    gtk_window_set_title(GTK_WINDOW(fontSelectionDialog), title);
+
+    if (curFont != NULL) {
+		gchar *fontName;
+
+        /* the curFont description contains the latest font info
+         * which is depended on the current scale
+         * overwrite it with the absoluteFontSize */
+        pango_font_description_set_size(curFont->fontDescription,
+                                        FONTSIZE_TO_PANGOSIZE(absoluteFontSize) * PANGO_SCALE);
+        fontName = pango_font_description_to_string(curFont->fontDescription);
+        gtk_font_selection_dialog_set_font_name(GTK_FONT_SELECTION_DIALOG(
+                fontSelectionDialog), fontName);
+        g_free(fontName);
+    }
+
+    gtk_widget_show(fontSelectionDialog);
+}
+
+/**
+ * Get the current font
+ *
+ * \return    describe the return value
+ */
+
+static wFont_p wlibSelectedFont(void)
+{
+    if (!fontInitted) {
+        fontInit();
+    }
+
+    return curFont;
+}
+
+/**
+ * Get the default font size
+ *
+ * \return    describe the return value
+ */
+
+wFontSize_t wSelectedFontSize(void)
+{
+    if (!fontInitted) {
+        fontInit();
+    }
+
+#if WLIB_FONT_DEBUG >= 3
+    fprintf(stderr, "the font size of current font description is: %d\n",
+            pango_font_description_get_size(curFont->fontDescription)/PANGO_SCALE);
+    fprintf(stderr, "the font size of absoluteFontSize is: %d\n",absoluteFontSize);
+#endif
+    return absoluteFontSize;
+}
+
+/**
+ * Set the default font size
+ *
+ * \param size IN font size
+ * \return    describe the return value
+ */
+
+void wSetSelectedFontSize(int size)
+{
+    absoluteFontSize = (wFontSize_t)size;
+}
+
+/**
+ * get the Pango font description as a string from a font definition.
+ * If the font definition is NULL, a default font is return. This is
+ * the current font if one is set. If not the first font from the font
+ * list is returned.
+ *
+ * \param fp IN the font definition
+ * \return    the font description
+ */
+
+const char *wlibFontTranslate(wFont_p fp)
+{
+    static gchar *fontName = NULL;
+
+    if (fontName != NULL) {
+        g_free(fontName);
+    }
+
+    if (!fontInitted) {
+        fontInit();
+    }
+
+    if (fp == NULL) {
+        fp = wlibSelectedFont();
+    }
+
+    if (fp == NULL) {
+        fp = standardFonts[0][FW_MEDIUM][FS_REGULAR];
+    }
+
+    fontName = pango_font_description_to_string(fp->fontDescription);
+#if WLIB_FONT_DEBUG >= 2
+    fprintf(stderr, "font translation: ");
+    fprintf(stderr, "  \"%s\"\n", fontName);
+#endif
+    return (const char *) fontName;
+}
+
+/**
+ * Return description for one of the standard fonts
+ *
+ * \return
+ */
+
+wFont_p wStandardFont(int face, wBool_t bold, wBool_t italic)
+{
+    if (!fontInitted) {
+        fontInit();
+    }
+
+    return standardFonts[face-F_TIMES][bold][italic];
+}