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Support UTF-8 BOM in TextEditor

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TextEditor will now recognize an UTF-8 BOM.

A setting to determine what to do on saving has been added as well - the
options are "Always Add", "Keep Already Present" and (mostly for
completeness) "Always Delete".
Note: if encoding is "System", "Always Add" doesn't work, because there
is no API to know what the System encoding is.

Task-number: QTCREATORBUG-1857

Merge-request: 2180
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
This commit is contained in:
Takumi ASAKI
2010-10-28 19:47:49 +02:00
committed by Oswald Buddenhagen
parent ab9f138ab4
commit 3cd32effdd
8 changed files with 145 additions and 6 deletions
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11
src/plugins/texteditor/basetextdocument.cpp
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@@ -133,6 +133,7 @@ BaseTextDocument::BaseTextDocument()
m_fileIsReadOnly = false;
m_isBinaryData = false;
m_codec = Core::EditorManager::instance()->defaultTextEncoding();
m_fileHasUtf8Bom = false;
m_hasDecodingError = false;
}
@@ -187,6 +188,12 @@ bool BaseTextDocument::save(const QString &fileName)
if (m_lineTerminatorMode == CRLFLineTerminator)
plainText.replace(QLatin1Char('\n'), QLatin1String("\r\n"));
Core::IFile::Utf8BomSetting utf8bomSetting = Core::EditorManager::instance()->utf8BomSetting();
if (m_codec->name() == "UTF-8" &&
(utf8bomSetting == Core::IFile::AlwaysAdd || (utf8bomSetting == Core::IFile::OnlyKeep && m_fileHasUtf8Bom))) {
file.write("\xef\xbb\xbf", 3);
}
file.write(m_codec->fromUnicode(plainText));
if (!file.flush())
return false;
@@ -259,6 +266,7 @@ bool BaseTextDocument::open(const QString &fileName)
int bytesRead = buf.size();
QTextCodec *codec = m_codec;
m_fileHasUtf8Bom = false;
// code taken from qtextstream
if (bytesRead >= 4 && ((uchar(buf[0]) == 0xff && uchar(buf[1]) == 0xfe && uchar(buf[2]) == 0 && uchar(buf[3]) == 0)
@@ -267,6 +275,9 @@ bool BaseTextDocument::open(const QString &fileName)
} else if (bytesRead >= 2 && ((uchar(buf[0]) == 0xff && uchar(buf[1]) == 0xfe)
|| (uchar(buf[0]) == 0xfe && uchar(buf[1]) == 0xff))) {
codec = QTextCodec::codecForName("UTF-16");
} else if (bytesRead >= 3 && ((uchar(buf[0]) == 0xef && uchar(buf[1]) == 0xbb) && uchar(buf[2]) == 0xbf)) {
codec = QTextCodec::codecForName("UTF-8");
m_fileHasUtf8Bom = true;
} else if (!codec) {
codec = QTextCodec::codecForLocale();
}