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// Copyright (C) 2024 Artifex Software, Inc.
//
// This file is part of MuPDF.
//
// MuPDF is free software: you can redistribute it and/or modify it under the
// terms of the GNU Affero General Public License as published by the Free
// Software Foundation, either version 3 of the License, or (at your option)
// any later version.
//
// MuPDF 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 Affero General Public License for more
// details.
//
// You should have received a copy of the GNU Affero General Public License
// along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
//
// Alternative licensing terms are available from the licensor.
// For commercial licensing, see <https://www.artifex.com/> or contact
// Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
// CA 94129, USA, for further information.
#include "xml-imp.h"
void fz_save_xml(fz_context *ctx, fz_xml *root, const char *path, int indented)
{
fz_output *out = fz_new_output_with_path(ctx, path, 0);
fz_try(ctx)
{
fz_write_xml(ctx, root, out, indented);
fz_close_output(ctx, out);
}
fz_always(ctx)
fz_drop_output(ctx, out);
fz_catch(ctx)
fz_rethrow(ctx);
}
static void
xml_escape_tag(fz_context *ctx, fz_output *out, const char *s)
{
while (1)
{
int c;
size_t len = fz_chartorune(&c, s);
size_t i;
if (c == 0)
break;
if (c == '<')
fz_write_string(ctx, out, "<");
else if (c == '>')
fz_write_string(ctx, out, ">");
else if (c == '&')
fz_write_string(ctx, out, "&");
else
for (i = 0; i < len; i++)
{
char d = s[i];
if (d < 32 || d >= 127)
{
fz_write_string(ctx, out, "&#x");
fz_write_byte(ctx, out, "0123456789abcdef"[(d>>4)&15]);
fz_write_byte(ctx, out, "0123456789abcdef"[d&15]);
fz_write_byte(ctx, out, ';');
}
else
fz_write_byte(ctx, out, d);
}
s += len;
}
}
static void
xml_escape_string(fz_context *ctx, fz_output *out, const char *s)
{
while (1)
{
int c;
size_t len = fz_chartorune(&c, s);
size_t i;
if (c == 0)
break;
if (c == '<')
fz_write_string(ctx, out, "<");
else if (c == '>')
fz_write_string(ctx, out, ">");
else if (c == '&')
fz_write_string(ctx, out, "&");
else if (c == '\"')
{
fz_write_string(ctx, out, """);
}
else
for (i = 0; i < len; i++)
{
char d = s[i];
if (d < 32 || d >= 127)
{
fz_write_string(ctx, out, "&#x");
fz_write_byte(ctx, out, "0123456789abcdef"[(d>>4)&15]);
fz_write_byte(ctx, out, "0123456789abcdef"[d&15]);
fz_write_byte(ctx, out, ';');
}
else
fz_write_byte(ctx, out, d);
}
s += len;
}
}
static void
indent(fz_context *ctx, fz_output *out, int depth)
{
fz_write_byte(ctx, out, '\n');
while (depth-- > 0)
{
fz_write_byte(ctx, out, ' ');
}
}
static int
do_write(fz_context *ctx, fz_xml *node, fz_output *out, int depth)
{
const char *tag;
fz_xml *down;
int last_was_text = 0;
for (; node != NULL; node = fz_xml_next(node))
{
struct attribute *att;
tag = fz_xml_tag(node);
if (!tag)
{
/* Text node. */
char *text = fz_xml_text(node);
if (text)
xml_escape_tag(ctx, out, text);
last_was_text = 1;
continue;
}
last_was_text = 0;
if (depth >= 0)
indent(ctx, out, depth);
fz_write_byte(ctx, out, '<');
xml_escape_tag(ctx, out, tag);
for (att = node->u.node.u.d.atts; att; att = att->next)
{
fz_write_byte(ctx, out, ' ');
xml_escape_tag(ctx, out, att->name);
fz_write_string(ctx, out, "=\"");
xml_escape_string(ctx, out, att->value);
fz_write_byte(ctx, out, '\"');
}
down = fz_xml_down(node);
if (down)
{
fz_write_byte(ctx, out, '>');
if (!do_write(ctx, down, out, depth >= 0 ? depth+1 : -1))
indent(ctx, out, depth);
fz_write_string(ctx, out, "</");
xml_escape_tag(ctx, out, tag);
fz_write_byte(ctx, out, '>');
}
else
{
fz_write_string(ctx, out, "/>");
}
}
return depth >= 0 ? last_was_text : 1;
}
void
fz_write_xml(fz_context *ctx, fz_xml *root, fz_output *out, int indented)
{
if (root == NULL)
return;
fz_write_string(ctx, out, "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>");
/* Skip over the document object, if we're handed that. */
if (root->up == NULL)
root = root->down;
if (!do_write(ctx, root, out, indented ? 0 : -1))
fz_write_byte(ctx, out, '\n');
}
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