#include "docktextedit.h"
#include "Settings.h"

#include <Qsci/qscistyle.h>
#include <Qsci/qscilexerjson.h>
#include <Qsci/qscilexerxml.h>

QsciLexerJSON* DockTextEdit::jsonLexer = nullptr;
QsciLexerXML* DockTextEdit::xmlLexer = nullptr;

DockTextEdit::DockTextEdit(QWidget* parent) :
 ExtendedScintilla(parent)
{
 // Create lexer objects if not done yet
 if(jsonLexer == nullptr)
 jsonLexer = new QsciLexerJSON(this);
 if(xmlLexer == nullptr)
 xmlLexer = new QsciLexerXML(this);

 // Set plain text as default
 setLanguage(PlainText);

 jsonLexer->setFoldCompact(false);
 jsonLexer->setHighlightComments(true);

 // Do rest of initialisation
 reloadSettings();
}

DockTextEdit::~DockTextEdit()
{
}

void DockTextEdit::reloadSettings()
{
 // Set the parent settings for both lexers
 reloadLexerSettings(jsonLexer);
 reloadLexerSettings(xmlLexer);

 // Set the databrowser font for the plain text editor.
 plainTextFont = QFont(Settings::getValue("databrowser", "font").toString());
 plainTextFont.setPointSize(Settings::getValue("databrowser", "fontsize").toInt());
 setFont(plainTextFont);

 setupSyntaxHighlightingFormat(jsonLexer, "comment", QsciLexerJSON::CommentLine);
 setupSyntaxHighlightingFormat(jsonLexer, "comment", QsciLexerJSON::CommentBlock);
 setupSyntaxHighlightingFormat(jsonLexer, "keyword", QsciLexerJSON::Keyword);
 setupSyntaxHighlightingFormat(jsonLexer, "keyword", QsciLexerJSON::KeywordLD);
 setupSyntaxHighlightingFormat(jsonLexer, "function", QsciLexerJSON::Operator);
 setupSyntaxHighlightingFormat(jsonLexer, "string", QsciLexerJSON::String);
 setupSyntaxHighlightingFormat(jsonLexer, "table", QsciLexerJSON::Number);
 setupSyntaxHighlightingFormat(jsonLexer, "identifier", QsciLexerJSON::Property);

 // The default style for invalid JSON or unclosed strings uses red
 // background and white foreground, but the current line has
 // precedence, so it is by default white over gray. We change the
 // default to something more readable for the current line at
 // invalid JSON.
 QColor stringColor = QColor(Settings::getValue("syntaxhighlighter", "string_colour").toString());
 jsonLexer->setColor(stringColor, QsciLexerJSON::Error);
 jsonLexer->setColor(stringColor, QsciLexerJSON::UnclosedString);
 QFont errorFont(Settings::getValue("editor", "font").toString());
 errorFont.setPointSize(Settings::getValue("editor", "fontsize").toInt());
 errorFont.setItalic(true);
 jsonLexer->setFont(errorFont, QsciLexerJSON::Error);
 jsonLexer->setFont(errorFont, QsciLexerJSON::UnclosedString);
 jsonLexer->setPaper(jsonLexer->defaultPaper(QsciLexerJSON::String), QsciLexerJSON::Error);
 jsonLexer->setPaper(jsonLexer->defaultPaper(QsciLexerJSON::String), QsciLexerJSON::UnclosedString);

 xmlLexer->setColor(QColor(Settings::getValue("syntaxhighlighter", "foreground_colour").toString()));
 setupSyntaxHighlightingFormat(xmlLexer, "comment", QsciLexerHTML::HTMLComment);
 setupSyntaxHighlightingFormat(xmlLexer, "keyword", QsciLexerHTML::Tag);
 setupSyntaxHighlightingFormat(xmlLexer, "keyword", QsciLexerHTML::XMLTagEnd);
 setupSyntaxHighlightingFormat(xmlLexer, "keyword", QsciLexerHTML::XMLStart);
 setupSyntaxHighlightingFormat(xmlLexer, "keyword", QsciLexerHTML::XMLEnd);
 setupSyntaxHighlightingFormat(xmlLexer, "string", QsciLexerHTML::HTMLDoubleQuotedString);
 setupSyntaxHighlightingFormat(xmlLexer, "string", QsciLexerHTML::HTMLSingleQuotedString);
 setupSyntaxHighlightingFormat(xmlLexer, "table", QsciLexerHTML::HTMLNumber);
 setupSyntaxHighlightingFormat(xmlLexer, "identifier", QsciLexerHTML::Attribute);
}

void DockTextEdit::setLanguage(Language lang)
{
 m_language = lang;
 switch (lang) {
 case PlainText: {
 setLexer(nullptr);
 setFolding(QsciScintilla::NoFoldStyle);
 // This appears to be reset by setLexer
 setFont(plainTextFont);
 break;
 }
 case JSON:
 setLexer(jsonLexer);
 setFolding(QsciScintilla::BoxedTreeFoldStyle);
 break;
 case XML:
 setLexer(xmlLexer);
 setFolding(QsciScintilla::BoxedTreeFoldStyle);
 break;
 }
}

void DockTextEdit::setTextInMargin(const QString& text)
{
 clearMarginText();
 setMarginType(0, QsciScintilla::TextMargin);
 setMarginText(0, text, QsciStyle(QsciScintillaBase::STYLE_LINENUMBER));
 setMarginWidth(0, text);
 reloadCommonSettings();
}

void DockTextEdit::clearTextInMargin()
{
 clearMarginText();
 setMarginLineNumbers(0, true);
 reloadCommonSettings();
 linesChanged();
}