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#include "sqltextedit.h"

#include "PreferencesDialog.h"

#include "SqlUiLexer.h"

#include <QFile>

#include <QDropEvent>

#include <QUrl>

#include <QMimeData>

#include <cmath>

SqlUiLexer* SqlTextEdit::sqlLexer = 0;

SqlTextEdit::SqlTextEdit(QWidget* parent) :

QsciScintilla(parent)

{

// Create lexer object if not done yet

if(sqlLexer == 0)

sqlLexer = new SqlUiLexer(this);

// Set the lexer

setLexer(sqlLexer);

// Enable auto completion

setAutoCompletionThreshold(3);

setAutoCompletionCaseSensitivity(false);

setAutoCompletionShowSingle(true);

setAutoCompletionSource(QsciScintilla::AcsAPIs);

// Set icons for auto completion

registerImage(SqlUiLexer::ApiCompleterIconIdKeyword, QImage(":/icons/keyword"));

registerImage(SqlUiLexer::ApiCompleterIconIdFunction, QImage(":/icons/function"));

registerImage(SqlUiLexer::ApiCompleterIconIdTable, QImage(":/icons/table"));

registerImage(SqlUiLexer::ApiCompleterIconIdColumn, QImage(":/icons/field"));

// Enable UTF8

setUtf8(true);

// Enable brace matching

setBraceMatching(QsciScintilla::SloppyBraceMatch);

// Enable auto indentation

setAutoIndent(true);

// Enable folding

setFolding(QsciScintilla::BoxedTreeFoldStyle);

// Create error indicator

errorIndicatorNumber = indicatorDefine(QsciScintilla::SquiggleIndicator);

setIndicatorForegroundColor(Qt::red, errorIndicatorNumber);

// Do rest of initialisation

reloadSettings();

// Connect signals

connect(this, SIGNAL(linesChanged()), this, SLOT(updateLineNumberAreaWidth()));

}

SqlTextEdit::~SqlTextEdit()

{

}

void SqlTextEdit::updateLineNumberAreaWidth()

{

// Calculate number of digits of the current number of lines

int digits = std::floor(std::log10(lines())) + 1;

// Calculate the width of this number if it was all zeros (this is because a 1 might require less space than a 0 and this could

// cause some flickering depending on the font) and set the new margin width.

QFont font = lexer()->font(QsciLexerSQL::Default);

setMarginWidth(0, QFontMetrics(font).width(QString("0").repeated(digits)) + 5);

}

void SqlTextEdit::dropEvent(QDropEvent* e)

{

QList<QUrl> urls = e->mimeData()->urls();

if(urls.isEmpty())

return QsciScintilla::dropEvent(e);

QString file = urls.first().toLocalFile();

if(!QFile::exists(file))

return;

QFile f(file);

f.open(QIODevice::ReadOnly);

setText(f.readAll());

f.close();

}

void SqlTextEdit::setupSyntaxHighlightingFormat(const QString& settings_name, int style)

{

sqlLexer->setColor(QColor(PreferencesDialog::getSettingsValue("syntaxhighlighter", settings_name + "_colour").toString()), style);

QFont font(PreferencesDialog::getSettingsValue("editor", "font").toString());

font.setPointSize(PreferencesDialog::getSettingsValue("editor", "fontsize").toInt());

font.setBold(PreferencesDialog::getSettingsValue("syntaxhighlighter", settings_name + "_bold").toBool());

font.setItalic(PreferencesDialog::getSettingsValue("syntaxhighlighter", settings_name + "_italic").toBool());

font.setUnderline(PreferencesDialog::getSettingsValue("syntaxhighlighter", settings_name + "_underline").toBool());

sqlLexer->setFont(font, style);

}

void SqlTextEdit::reloadKeywords()

{

// Set lexer again to reload the updated keywords list

setLexer(lexer());

}

void SqlTextEdit::reloadSettings()

{

// Set syntax highlighting settings

QFont defaultfont(PreferencesDialog::getSettingsValue("editor", "font").toString());

defaultfont.setStyleHint(QFont::TypeWriter);

defaultfont.setPointSize(PreferencesDialog::getSettingsValue("editor", "fontsize").toInt());

sqlLexer->setColor(Qt::black, QsciLexerSQL::Default);

sqlLexer->setFont(defaultfont);

setupSyntaxHighlightingFormat("comment", QsciLexerSQL::Comment);

setupSyntaxHighlightingFormat("comment", QsciLexerSQL::CommentLine);

setupSyntaxHighlightingFormat("comment", QsciLexerSQL::CommentDoc);

setupSyntaxHighlightingFormat("keyword", QsciLexerSQL::Keyword);

setupSyntaxHighlightingFormat("table", QsciLexerSQL::KeywordSet6);

setupSyntaxHighlightingFormat("function", QsciLexerSQL::KeywordSet7);

setupSyntaxHighlightingFormat("string", QsciLexerSQL::DoubleQuotedString);

setupSyntaxHighlightingFormat("string", QsciLexerSQL::SingleQuotedString);

setupSyntaxHighlightingFormat("identifier", QsciLexerSQL::Identifier);

setupSyntaxHighlightingFormat("identifier", QsciLexerSQL::QuotedIdentifier);

// Set font

QFont font(PreferencesDialog::getSettingsValue("editor", "font").toString());

font.setStyleHint(QFont::TypeWriter);

font.setPointSize(PreferencesDialog::getSettingsValue("editor", "fontsize").toInt());

setFont(font);

// Show line numbers

QFont marginsfont(QFont(PreferencesDialog::getSettingsValue("editor", "font").toString()));

marginsfont.setPointSize(font.pointSize());

setMarginsFont(marginsfont);

setMarginLineNumbers(0, true);

setMarginsBackgroundColor(Qt::lightGray);

updateLineNumberAreaWidth();

// Highlight current line

setCaretLineVisible(true);

setCaretLineBackgroundColor(QColor(PreferencesDialog::getSettingsValue("syntaxhighlighter", "currentline_colour").toString()));

// Set tab width

setTabWidth(PreferencesDialog::getSettingsValue("editor", "tabsize").toInt());

// Check if error indicators are enabled and clear them if they just got disabled

showErrorIndicators = PreferencesDialog::getSettingsValue("editor", "error_indicators").toBool();

if(!showErrorIndicators)

clearErrorIndicators();

}

void SqlTextEdit::clearErrorIndicators()

{

// Clear any error indicators from position (0,0) to the last column of the last line

clearIndicatorRange(0, 0, lines(), lineLength(lines()), errorIndicatorNumber);

}

void SqlTextEdit::setErrorIndicator(int fromRow, int fromIndex, int toRow, int toIndex)

{

// Set error indicator for the specified range but only if they're enabled

if(showErrorIndicators)

fillIndicatorRange(fromRow, fromIndex, toRow, toIndex, errorIndicatorNumber);

}