66 lines
2.1 KiB
C++
66 lines
2.1 KiB
C++
#ifndef HTML_H
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#define HTML_H
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#include <QTextDocument>
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#include <QTextFragment>
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#include <QXmlStreamReader>
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#include <QXmlStreamWriter>
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namespace olive
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{
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/**
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* @brief Functions for converting HTML to QTextDocument and vice versa
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*
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* Qt does contain its own functions for this, however they have some limitations. Some things that
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* we want to support (e.g. kerning/spacing and font stretch) are not implemented in Qt's
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* QTextHtmlExporter and QTextHtmlParser. Additionally, since these functions are not part of Qt's
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* public API, and make many references to other parts of Qt that are not part of the public API,
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* there is no way to subclass or extend their functionality without forking Qt as a whole.
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*
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* Therefore, it became necessary to write a custom class for the conversion so that we can
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* ensure support for the features we need.
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*
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* If someone wishes to extend this class for more feature support, feel free to open a pull
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* request. But this is NOT intended to be an exhaustive HTML implementation, and is primarily
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* designed to store rich text in a standard format for the purpose of text formatting for video.
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*/
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class Html {
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public:
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static QString DocToHtml(const QTextDocument *doc);
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static void HtmlToDoc(QTextDocument *doc, const QString &html);
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private:
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static void WriteBlock(QXmlStreamWriter *writer, const QTextBlock &block);
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static void WriteFragment(QXmlStreamWriter *writer,
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const QTextFragment &fragment);
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static void WriteCSSProperty(QString *style, const QString &key,
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const QStringList &value);
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static void WriteCSSProperty(QString *style, const QString &key,
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const QString &value)
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{
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WriteCSSProperty(style, key, QStringList({ value }));
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}
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static void WriteCharFormat(QString *style, const QTextCharFormat &fmt);
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static QTextCharFormat
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ReadCharFormat(const QXmlStreamAttributes &attributes);
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static QTextBlockFormat
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ReadBlockFormat(const QXmlStreamAttributes &attributes);
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static void AppendStringAutoSpace(QString *s, const QString &append);
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static QMap<QString, QStringList> GetCSSFromStyle(const QString &s);
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static const QVector<QString> kBlockTags;
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};
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}
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#endif // HTML_H
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