File indexing completed on 2022-01-30 18:32:35

 /*
     SPDX-FileCopyrightText: 2021 Antonio Prcela <antonio.prcela@gmail.com>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "kcalchistory.h"
 #include "kcalc_settings.h"
 
 //------------------------------------------------------------------------------
 // Name: KCalcHistory
 // Desc: constructor
 //------------------------------------------------------------------------------
 KCalcHistory::KCalcHistory(QWidget *parent)
     : QTextEdit(parent)
 {
     setReadOnly(true);
     setWordWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
 
     // Initialize idealPointSizeF_
     idealPointSizeF_ = currentFont().pointSizeF();
 }
 
 //------------------------------------------------------------------------------
 // Name: KCalcHistory
 // Desc: destructor
 //------------------------------------------------------------------------------
 KCalcHistory::~KCalcHistory() = default;
 
 //------------------------------------------------------------------------------
 // Name: addToHistory
 // Desc: Adds the latest calculations to  history window
 //------------------------------------------------------------------------------
 void KCalcHistory::addToHistory(const QString &str, bool set_new_line_)
 {
     // add_new_line_ is false on launch and after clearHistory()
     // so the first line doesn't get an unnecessary new line
     if (add_new_line_) {
         insertHtml(QStringLiteral("<br>"));
         moveCursor(QTextCursor::Start);
         add_new_line_ = false;
     }
 
     insertHtml(str);
 
     if (set_new_line_) {
         moveCursor(QTextCursor::Start);
         add_new_line_ = true;
     }
 
     setAlignment(Qt::AlignRight);
     ensureCursorVisible();
 }
 
 //------------------------------------------------------------------------------
 // Name: addResultToHistory
 // Desc: Used mostly for functions that are not in CalcEngine::Operation
 //       adds "=" and the result with newline endings
 //------------------------------------------------------------------------------
 void KCalcHistory::addResultToHistory(const QString &display_content)
 {
     addToHistory(QStringLiteral("&nbsp;=&nbsp;") + display_content, true);
 }
 
 //------------------------------------------------------------------------------
 // Name: addFuncToHistory
 // Desc: Adds the current function symbol, taken via CalcEngine::Operation
 //       to the history window
 //------------------------------------------------------------------------------
 void KCalcHistory::addFuncToHistory(const CalcEngine::Operation FUNC)
 {
     QString textToHistroy = QStringLiteral("&nbsp;");
 
     if (FUNC == CalcEngine::FUNC_PERCENT) {
         textToHistroy += QStringLiteral("%");
     } else if (FUNC == CalcEngine::FUNC_OR) {
         textToHistroy += QStringLiteral("OR");
     } else if (FUNC == CalcEngine::FUNC_XOR) {
         textToHistroy += QStringLiteral("XOR");
     } else if (FUNC == CalcEngine::FUNC_AND) {
         textToHistroy += QStringLiteral("AND");
     } else if (FUNC == CalcEngine::FUNC_LSH) {
         textToHistroy += QStringLiteral("Lsh");
     } else if (FUNC == CalcEngine::FUNC_RSH) {
         textToHistroy += QStringLiteral("Rsh");
     } else if (FUNC == CalcEngine::FUNC_ADD) {
         textToHistroy += QStringLiteral("+");
     } else if (FUNC == CalcEngine::FUNC_SUBTRACT) {
         textToHistroy += QStringLiteral("-");
     } else if (FUNC == CalcEngine::FUNC_MULTIPLY) {
         textToHistroy += QStringLiteral("×");
     } else if (FUNC == CalcEngine::FUNC_DIVIDE) {
         textToHistroy += QStringLiteral("÷");
     } else if (FUNC == CalcEngine::FUNC_MOD) {
         textToHistroy += QStringLiteral("Mod");
     } else if (FUNC == CalcEngine::FUNC_INTDIV) {
         textToHistroy += QStringLiteral("IntDiv");
     } else if (FUNC == CalcEngine::FUNC_BINOM) {
         textToHistroy += QStringLiteral("Binom");
     }
 
     textToHistroy += QStringLiteral("&nbsp;");
     addToHistory(textToHistroy, false);
 }
 
 //------------------------------------------------------------------------------
 // Name: addFuncToHistory
 // Desc: Adds the current function symbol the history window
 //------------------------------------------------------------------------------
 void KCalcHistory::addFuncToHistory(const QString &func)
 {
     QString textToHistroy = QStringLiteral("&nbsp;") + func + QStringLiteral("&nbsp;");
     addToHistory(textToHistroy, false);
 }
 
 //------------------------------------------------------------------------------
 // Name: clearHistory
 // Desc: Clears the content of the history window
 //------------------------------------------------------------------------------
 void KCalcHistory::clearHistory()
 {
     clear();
     add_new_line_ = false;
 }
 
 //------------------------------------------------------------------------------
 // Name: changeSettings
 // Desc:
 //------------------------------------------------------------------------------
 void KCalcHistory::changeSettings()
 {
     QPalette pal = palette();
 
     pal.setColor(QPalette::Text, KCalcSettings::foreColor());
     pal.setColor(QPalette::Base, KCalcSettings::backColor());
 
     setPalette(pal);
 
     setFont(KCalcSettings::historyFont());
 }
 
 //------------------------------------------------------------------------------
 // Name: setFont
 // Desc: Set the base font and recalculate the font size to better fit
 //------------------------------------------------------------------------------
 void KCalcHistory::setFont(const QFont &font)
 {
     // Overwrite current baseFont
     baseFont_ = font;
     updateFont();
 }
 
 //------------------------------------------------------------------------------
 // Name: updateFont
 // Desc: Update font using baseFont to better fit
 //------------------------------------------------------------------------------
 void KCalcHistory::updateFont(double zoomFactor)
 {
     // Make a working copy of the font
     QFont* newFont = new QFont(baseFont());
 
     // Calculate actual font size by keeping the ratio, keeping previous zoomFactor, using historyFont as minimum size
     double ratio = (minimumSize().width() - contentsMargins().left() - contentsMargins().right()) / baseFont().pointSizeF();
     idealPointSizeF_ = contentsRect().width() / ratio;
     newFont->setPointSizeF(qMax(double(baseFont().pointSizeF()), idealPointSizeF_) * zoomFactor);
 
     // Apply font
     QTextEdit::setFont(*newFont);
     
     // Free the memory
     delete newFont;
 }
 
 //------------------------------------------------------------------------------
 // Name: baseFont
 // Desc: Returns current baseFont
 //------------------------------------------------------------------------------
 const QFont& KCalcHistory::baseFont() const
 {
     return baseFont_;
 }
 
 //------------------------------------------------------------------------------
 // Name: resizeEvent
 // Desc: resize history and adjust font size
 //------------------------------------------------------------------------------
 void KCalcHistory::resizeEvent(QResizeEvent* event)
 {
     QTextEdit::resizeEvent(event);
 
     // Determine current zoom
     double zoomFactor = currentFont().pointSizeF() / idealPointSizeF_;
 
     // Update font size
     updateFont(zoomFactor);
 
     updateGeometry();
 }