path: root/widgets/misc/e-unicode.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * Copyright (C) 2000 Helix Code, Inc.
 *
 * Authors: Lauris Kaplinski <lauris@helixcode.com>
 *         
 */

#include <config.h>
#include <unicode.h>
#include "e-unicode.h"

const gchar *
e_utf8_strstrcase (const gchar *haystack, const gchar *needle)
{
    gchar *p;
    unicode_char_t *huni, *nuni;
    unicode_char_t unival;
    gint hlen, nlen, hp, np;

    if (haystack == NULL) return NULL;
    if (needle == NULL) return NULL;
    if (strlen (needle) == 0) return haystack;

    huni = alloca (sizeof (unicode_char_t) * strlen (haystack));

    for (hlen = 0, p = unicode_get_utf8 (haystack, &unival); p && unival; hlen++, p = unicode_get_utf8 (p, &unival)) {
        huni[hlen] = unicode_tolower (unival);
    }

    if (!p) return NULL;
    if (hlen == 0) return NULL;

    nuni = alloca (sizeof (unicode_char_t) * strlen (needle));

    for (nlen = 0, p = unicode_get_utf8 (needle, &unival); p && unival; nlen++, p = unicode_get_utf8 (p, &unival)) {
        nuni[nlen] = unicode_tolower (unival);
    }

    if (!p) return NULL;
    if (nlen == 0) return NULL;

    if (hlen < nlen) return NULL;

    for (hp = 0; hp <= hlen - nlen; hp++) {
        for (np = 0; np < nlen; np++) {
            if (huni[hp + np] != nuni[np]) break;
        }
        if (np == nlen) return haystack + unicode_offset_to_index (haystack, hp);
    }

    return NULL;
}

gchar *
e_utf8_from_gtk_event_key (GtkWidget *widget, guint keyval, const gchar *string)
{
    /* test it out with iso-8859-1 */

    static gboolean uinit = FALSE;
    static gboolean uerror = FALSE;
    static unicode_iconv_t uiconv = (unicode_iconv_t) -1;
    char *new, *ob;
    size_t ibl, obl;

    if (uerror) return NULL;

    if (!string) return NULL;

    if (!uinit) {
        unicode_init ();
        uiconv = unicode_iconv_open ("UTF-8", "iso-8859-1");
        if (uiconv == (unicode_iconv_t) -1) {
            uerror = TRUE;
            return NULL;
        } else {
            uinit = TRUE;
        }
    }

    ibl = strlen (string);
    new = ob = g_new (gchar, ibl * 6 + 1);
    obl = ibl * 6 + 1;

    unicode_iconv (uiconv, &string, &ibl, &ob, &obl);

    *ob = '\0';

    return new;
}

gchar *
e_utf8_from_gtk_string (GtkWidget *widget, const gchar *string)
{
    /* test it out with iso-8859-1 */

    static gboolean uinit = FALSE;
    static gboolean uerror = FALSE;
    static unicode_iconv_t uiconv = (unicode_iconv_t) -1;
    char *new, *ob;
    size_t ibl, obl;

    if (uerror) return NULL;

    if (!string) return NULL;

    if (!uinit) {
        unicode_init ();
        uiconv = unicode_iconv_open ("UTF-8", "iso-8859-1");
        if (uiconv == (unicode_iconv_t) -1) {
            uerror = TRUE;
            return NULL;
        } else {
            uinit = TRUE;
        }
    }

    ibl = strlen (string);
    new = ob = g_new (gchar, ibl * 6 + 1);
    obl = ibl * 6 + 1;

    unicode_iconv (uiconv, &string, &ibl, &ob, &obl);

    *ob = '\0';

    return new;
}

gchar *
e_utf8_to_gtk_string (GtkWidget *widget, const gchar *string)
{
    /* test it out with iso-8859-1 */

    static gboolean uinit = FALSE;
    static gboolean uerror = FALSE;
    static unicode_iconv_t uiconv = (unicode_iconv_t) -1;
    char *new, *ob;
    size_t ibl, obl;

    if (uerror) return NULL;

    if (!string) return NULL;

    if (!uinit) {
        unicode_init ();
        uiconv = unicode_iconv_open ("iso-8859-1", "UTF-8");
        if (uiconv == (unicode_iconv_t) -1) {
            uerror = TRUE;
            return NULL;
        } else {
            uinit = TRUE;
        }
    }

    ibl = strlen (string);
    new = ob = g_new (gchar, ibl * 2 + 1);
    obl = ibl * 2 + 1;

    unicode_iconv (uiconv, &string, &ibl, &ob, &obl);

    *ob = '\0';

    return new;
}

gchar *
e_utf8_gtk_entry_get_text (GtkEntry *entry)
{
    gchar *s, *u;

    s = gtk_entry_get_text (entry);
    if (!s) return NULL;
    u = e_utf8_from_gtk_string ((GtkWidget *) entry, s);
    return u;
}

gchar *
e_utf8_gtk_editable_get_chars (GtkEditable *editable, gint start, gint end)
{
    gchar *s, *u;

    s = gtk_editable_get_chars (editable, start, end);
    if (!s) return NULL;
    u = e_utf8_from_gtk_string ((GtkWidget *) editable, s);
    g_free (s);
    return u;
}

void
e_utf8_gtk_entry_set_text (GtkEntry *entry, const gchar *text)
{
    gchar *s;

    if (!text) return;

    s = e_utf8_to_gtk_string ((GtkWidget *) entry, text);
    gtk_entry_set_text (entry, s);

    if (s) g_free (s);
}