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/*
* Copyright (c) 2008, 2009, Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "third_party/blink/renderer/core/clipboard/clipboard_utilities.h"
#include "base/strings/escape.h"
#include "third_party/blink/renderer/platform/weborigin/kurl.h"
#include "third_party/blink/renderer/platform/wtf/text/base64.h"
#include "third_party/blink/renderer/platform/wtf/text/character_names.h"
#include "third_party/blink/renderer/platform/wtf/text/character_visitor.h"
#include "third_party/blink/renderer/platform/wtf/text/string_builder.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace blink {
namespace {
String EscapeForHTML(const String& str) {
// base::EscapeForHTML can work on 8-bit Latin-1 strings as well as 16-bit
// strings. This could use MarkupFormatter::AppendAttributeValue instead to
// avoid unnecessary copying and be more aligned with Blink serialization.
return WTF::VisitCharacters(str, [](auto chars) {
auto result = base::EscapeForHTML(base::as_string_view(chars));
return String(result);
});
}
} // namespace
void ReplaceNBSPWithSpace(String& str) {
str.Replace(kNoBreakSpaceCharacter, kSpaceCharacter);
}
String ConvertURIListToURL(const String& uri_list) {
Vector<String> items;
// Line separator is \r\n per RFC 2483 - however, for compatibility
// reasons we allow just \n here.
uri_list.Split('\n', items);
// Process the input and return the first valid URL. In case no URLs can
// be found, return an empty string. This is in line with the HTML5 spec.
for (String& line : items) {
line = line.StripWhiteSpace();
if (line.empty())
continue;
if (line[0] == '#')
continue;
KURL url = KURL(line);
if (url.IsValid())
return url;
}
return String();
}
String URLToImageMarkup(const KURL& url, const String& title) {
StringBuilder builder;
builder.Append("<img src=\"");
builder.Append(EscapeForHTML(url.GetString()));
builder.Append("\"");
if (!title.empty()) {
builder.Append(" alt=\"");
builder.Append(EscapeForHTML(title));
builder.Append("\"");
}
builder.Append("/>");
return builder.ToString();
}
String PNGToImageMarkup(base::span<const uint8_t> png_data) {
if (png_data.empty()) {
return String();
}
StringBuilder markup;
markup.Append("<img src=\"data:image/png;base64,");
markup.Append(Base64Encode(png_data));
markup.Append("\" alt=\"\"/>");
return markup.ToString();
}
} // namespace blink
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