Toshihiro Shimizu 890ddd
Toshihiro Shimizu 890ddd
Toshihiro Shimizu 890ddd
#include "toonzqt/expressionfield.h"
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#include "texpression.h"
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#include "tparser.h"
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#include "tconvert.h"
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#include <qsyntaxhighlighter></qsyntaxhighlighter>
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#include <qcompleter></qcompleter>
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#include <qkeyevent></qkeyevent>
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#include <qabstractitemview></qabstractitemview>
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#include <qscrollbar></qscrollbar>
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#include <qstringlistmodel></qstringlistmodel>
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#include <qstandarditemmodel></qstandarditemmodel>
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#include <qstandarditem></qstandarditem>
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#include <qtooltip></qtooltip>
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#include <qlistview></qlistview>
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#include <qlabel></qlabel>
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using namespace DVGui;
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using namespace TSyntax;
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//=============================================================================
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class ExpressionField::SyntaxHighlighter final : public QSyntaxHighlighter {
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  const Grammar *m_grammar;
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public:
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  bool m_open;
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  SyntaxHighlighter(QTextDocument *parent)
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      : QSyntaxHighlighter(parent), m_grammar(0), m_open(true) {}
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  ~SyntaxHighlighter() {}
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  void setGrammar(const Grammar *grammar) { m_grammar = grammar; }
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  void highlightBlock(const QString &text) override {
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    Parser parser(m_grammar);
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    std::vector<syntaxtoken> tokens;</syntaxtoken>
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    Parser::SyntaxStatus status =
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        parser.checkSyntax(tokens, text.toStdString());
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    int nextPos = 0;
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    for (int i = 0; i < (int)tokens.size(); i++) {
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      QTextCharFormat fmt;
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      int pos    = tokens[i].m_pos;
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      int length = tokens[i].m_length;
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      int type   = tokens[i].m_type;
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      nextPos    = pos + length;
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      switch (type) {
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      case TSyntax::Unknown:
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        fmt.setForeground(Qt::black);
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        break;
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      case TSyntax::Number:
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        fmt.setForeground(QColor(0x50, 0x7d, 0x0));
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        break;  // number
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      case TSyntax::Constant:
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        fmt.setForeground(QColor(0x50, 0x7d, 0x0));
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        break;  // constant
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      case TSyntax::Variable:
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        fmt.setForeground(QColor(0x0, 0x88, 0xc8));
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        break;  // var
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      case TSyntax::Operator:
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        fmt.setForeground(QColor(50, 0, 255));
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        break;  // infix
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      case TSyntax::Parenthesis:
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        fmt.setForeground(QColor(50, 50, 255));
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        break;  // braket
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      case TSyntax::Function:
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        fmt.setForeground(QColor(0x0, 0x50, 0x7d));
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        break;  // fname
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      case TSyntax::Comma:
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        fmt.setForeground(QColor(50, 20, 255));
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        break;  // f ;
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      case TSyntax::UnexpectedToken:
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        fmt.setForeground(QColor(0xdc, 0x0, 0x0));
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        break;  // expression not found
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      case TSyntax::Eos:
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        fmt.setForeground(QColor(255, 127, 0));
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        break;  //  EOS
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      case TSyntax::Mismatch:
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        fmt.setForeground(QColor(255, 0, 0));
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        break;  // token mismatch
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      default:
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        fmt.setForeground(QColor(127, 127, 255));
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        break;
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      }
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      if (type == 4) fmt.setToolTip("Infix");
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      if (length == 0) length = 1;
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      setFormat(pos, length, fmt);
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    }
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  }
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};
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//=============================================================================
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class MyListView final : public QListView {
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  QLabel *m_tooltip;
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public:
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  MyListView() : QListView() {
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    setObjectName("SuggestionPopup");
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    setStyleSheet(
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        "#SuggestionPopup {background-color:#FFFFFF; border:1px solid black; "
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        "color: black;}");
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    setWindowFlags(Qt::Popup);
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    setMouseTracking(true);
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    m_tooltip = new QLabel(0, Qt::ToolTip);
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    // Stesso stile del popuop che lo contiene.
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    m_tooltip->hide();
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    m_tooltip->setObjectName("helpTooltip");
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    m_tooltip->setAlignment(Qt::AlignLeft);
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    m_tooltip->setIndent(1);
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    m_tooltip->setWordWrap(false);
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  }
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  void showEvent(QShowEvent *) override { showToolTip(currentIndex()); }
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  void hideEvent(QHideEvent *) override { m_tooltip->hide(); }
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  void currentChanged(const QModelIndex ¤t,
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                      const QModelIndex &previous) override {
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    showToolTip(current);
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    QListView::currentChanged(current, previous);
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  }
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  void showToolTip(const QModelIndex &index) {
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    if (!index.isValid()) {
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      m_tooltip->hide();
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      return;
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    }
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    QVariant data = model()->data(index, Qt::ToolTipRole);
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    if (!data.isValid()) {
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      m_tooltip->hide();
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      return;
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    }
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    QRect rect = visualRect(index);
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    m_tooltip->setText(data.toString());
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    QPoint pos = viewport()->mapToGlobal(
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        QPoint(-m_tooltip->sizeHint().width(), rect.top()));
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    m_tooltip->setGeometry(QRect(pos, m_tooltip->sizeHint()));
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    m_tooltip->show();
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  }
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protected:
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  void resizeEvent(QResizeEvent *e) override {
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    QListView::resizeEvent(e);
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    if (m_tooltip->isVisible()) showToolTip(currentIndex());
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  }
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};
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//=============================================================================
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ExpressionField::ExpressionField(QWidget *parent)
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    : QTextEdit(parent)
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    , m_editing(false)
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    , m_grammar(0)
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    , m_syntaxHighlighter(0)
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    , m_completerPopup(0)
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    , m_completerStartPos(0) {
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  setFrameStyle(QFrame::StyledPanel);
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  setObjectName("ExpressionField");
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  setLineWrapMode(NoWrap);
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  setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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  setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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  setTabChangesFocus(true);
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  // setSizePolicy(QSizePolicy(QSizePolicy::Expanding,QSizePolicy::Fixed));
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  connect(this, SIGNAL(textChanged()), this, SLOT(onTextChanged()));
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#ifdef MACOSX
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  setFixedHeight(23);
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#else
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  setFixedHeight(20);  // +40);
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#endif
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  m_completerPopup          = new MyListView();
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  QStandardItemModel *model = new QStandardItemModel();
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  m_completerPopup->setModel(model);
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  m_completerPopup->setFocusPolicy(Qt::NoFocus);
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  m_completerPopup->setFocusProxy(this);
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  m_completerPopup->installEventFilter(this);
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  connect(m_completerPopup, SIGNAL(clicked(const QModelIndex &)), this,
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          SLOT(insertCompletion(const QModelIndex &)));
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  m_syntaxHighlighter = new SyntaxHighlighter(document());
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}
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ExpressionField::~ExpressionField() { delete m_syntaxHighlighter; }
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void ExpressionField::showEvent(QShowEvent *e) { QTextEdit::showEvent(e); }
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void ExpressionField::hideEvent(QHideEvent *e) { QTextEdit::hideEvent(e); }
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void ExpressionField::setExpression(std::string expression) {
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  setPlainText(QString::fromStdString(expression));
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}
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std::string ExpressionField::getExpression() const {
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  return toPlainText().toStdString();
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}
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bool ExpressionField::event(QEvent *e) {
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  if (e->type() == QEvent::ToolTip) {
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    QHelpEvent *helpEvent = static_cast<qhelpevent *="">(e);</qhelpevent>
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    // openCompletionPopup();
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  } else if (e->type() == QEvent::ShortcutOverride) {
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    e->accept();
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    return true;
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  }
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  // else
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  return QTextEdit::event(e);
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}
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void ExpressionField::keyPressEvent(QKeyEvent *e) {
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  // setStyleSheet("background-color: cyan");
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  if (e->key() == Qt::Key_Return || e->key() == Qt::Key_Enter) {
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    m_editing = false;
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    emit expressionChanged();
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  } else if (e->key() == Qt::Key_F10) {
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    setAutoFillBackground(true);
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    QPalette p = palette();
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    p.setColor(QPalette::Base, Qt::cyan);
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    p.setColor(QPalette::Window, Qt::cyan);
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    setPalette(p);
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    update();
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    setStyleSheet("#ExpressionField {background-color:cyan;}");
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  } else if (e->key() == Qt::Key_F11) {
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    m_completerPopup->installEventFilter(this);
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    QRect cr = cursorRect();
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    QSize size(100, 200);
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    QPoint pos = mapToGlobal(QPoint(cr.left(), cr.top() - size.height()));
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    m_completerPopup->setGeometry(QRect(pos, size));
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    m_completerPopup->show();
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    QTextEdit::keyPressEvent(e);
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  } else {
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    QTextEdit::keyPressEvent(e);
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    if (m_completerPopup->isVisible()) {
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      updateCompleterPopup();
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    } else if ((Qt::Key_A <= e->key() && e->key() <= Qt::Key_Z) ||
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               std::string("+&|!*/=?,:-").find(e->key()) != std::string::npos) {
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      openCompleterPopup();
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    }
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    setFocus();
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  }
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}
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bool ExpressionField::eventFilter(QObject *obj, QEvent *e) {
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  if (e->type() == QEvent::KeyPress) {
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    QKeyEvent *keyEvent = static_cast<qkeyevent *="">(e);</qkeyevent>
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    switch (keyEvent->key()) {
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    case Qt::Key_Return:
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    case Qt::Key_Enter:
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      insertCompletion(m_completerPopup->currentIndex());
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      return true;
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    case Qt::Key_Left:
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    case Qt::Key_Right:
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      event(keyEvent);
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      m_completerPopup->hide();
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      return true;
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    case Qt::Key_Escape:
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      m_completerPopup->hide();
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      return true;
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    case Qt::Key_Down:
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    case Qt::Key_Up:
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      return false;
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    default:
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      event(e);
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      return true;
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    }
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  } else if (e->type() == QEvent::MouseButtonPress) {
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    m_completerPopup->hide();
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    event(e);
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    return true;
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  } else if (e->type() == QEvent::ShortcutOverride) {
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    e->accept();
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    return true;
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  }
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  return QObject::eventFilter(obj, e);
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}
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void ExpressionField::onTextChanged() {
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  if (!m_editing) {
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    m_editing = true;
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    // setStyleSheet("background: rgb(250,200,200)");
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  }
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}
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void ExpressionField::focusInEvent(QFocusEvent *e) {
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  m_syntaxHighlighter->m_open = true;
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  m_syntaxHighlighter->rehighlight();
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  QTextEdit::focusInEvent(e);
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}
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void ExpressionField::focusOutEvent(QFocusEvent *e) {
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  m_syntaxHighlighter->m_open = false;
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  m_syntaxHighlighter->rehighlight();
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  QTextEdit::focusOutEvent(e);
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}
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void ExpressionField::onCursorPositionChanged() {}
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void ExpressionField::openCompleterPopup() {
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  int n = computeSuggestions();
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  if (n < 2) return;
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  if (updateCompleterPopup()) m_completerPopup->show();
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}
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bool ExpressionField::updateCompleterPopup() {
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  int start        = m_completerStartPos;
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  int pos          = textCursor().position();
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  std::string text = getExpression();
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  if (m_suggestions.empty() || start < 0 || start > pos ||
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      pos > (int)text.length()) {
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    if (m_completerPopup->isVisible()) m_completerPopup->hide();
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    return false;
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  }
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  QStandardItemModel *model = new QStandardItemModel();
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  std::string prefix        = toLower(text.substr(start, pos - start));
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  int prefixLength          = prefix.length();
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  int count                 = 0;
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  for (int i = 0; i < (int)m_suggestions.size(); i++) {
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    std::string item = m_suggestions[i].first;
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    if ((int)item.length() >= prefixLength &&
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        toLower(item.substr(0, prefixLength)) == prefix) {
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      QStandardItem *item = new QStandardItem();
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      item->setData(QString::fromStdString(m_suggestions[i].first),
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                    Qt::EditRole);
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      if (m_suggestions[i].second != "")
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        item->setData(QString::fromStdString(m_suggestions[i].second),
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                      Qt::ToolTipRole);
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      model->appendRow(item);
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      count++;
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    }
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  }
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  if (count == 0) {
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    if (m_completerPopup->isVisible()) m_completerPopup->hide();
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    return false;
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  }
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  m_completerPopup->setModel(model);
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  m_completerPopup->setCurrentIndex(model->index(0, 0));
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  QTextCursor cursor(textCursor());
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  cursor.setPosition(m_completerStartPos);
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  QRect cr = cursorRect(cursor);
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  int w = m_completerPopup->sizeHintForColumn(0) +
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          m_completerPopup->verticalScrollBar()->sizeHint().width() + 5;
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  int h =
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      (m_completerPopup->sizeHintForRow(0) * std::min(7, model->rowCount()) +
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       3) +
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      3;
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  QSize size(w, h);
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  QPoint popupPos = mapToGlobal(QPoint(cr.left(), cr.bottom() + 3));
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  m_completerPopup->setGeometry(QRect(popupPos, size));
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  return true;
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}
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int ExpressionField::computeSuggestions() {
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  m_completerStartPos = -1;
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  m_suggestions.clear();
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  std::string text = getExpression();
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  int pos          = textCursor().position();
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  int start        = pos;
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  if (start > 0) {
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    start--;
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    while (start > 0) {
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      char c = text[start - 1];
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      if ((isascii(c) && isalpha(c)) || c == '_' ||
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          (c == '.' && (start - 2 < 0 || (isascii(text[start - 2]) &&
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                                          isalpha(text[start - 2]))))) {
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      } else
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        break;
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      start--;
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    }
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  }
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  if (start >= (int)text.length()) return 0;
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  m_completerStartPos = start;
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  text                = text.substr(0, start);
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  TSyntax::Parser parser(m_grammar);
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  parser.getSuggestions(m_suggestions, text);
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  return (int)m_suggestions.size();
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}
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void ExpressionField::insertCompletion() {
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  if (!m_completerPopup->isVisible()) return;
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  QModelIndex index = m_completerPopup->currentIndex();
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  if (!index.isValid()) return;
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  QString item =
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      m_completerPopup->model()->data(index, Qt::EditRole).toString();
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  QTextCursor tc = textCursor();
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  int pos        = tc.position();
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  // tc.movePosition(m_completionStartPos, QTextCursor::KeepAnchor);
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  tc.insertText(item);
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  m_completerPopup->hide();
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}
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void ExpressionField::insertCompletion(const QModelIndex &index) {
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  if (index.isValid()) {
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    QString item =
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        m_completerPopup->model()->data(index, Qt::EditRole).toString();
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    QTextCursor tc = textCursor();
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    int pos        = tc.position();
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    if (pos - m_completerStartPos >= 1)
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      tc.movePosition(QTextCursor::Left, QTextCursor::KeepAnchor,
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                      pos - m_completerStartPos);
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    tc.insertText(item);
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  }
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  m_completerPopup->hide();
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}
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void ExpressionField::setGrammar(const Grammar *grammar) {
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  m_grammar = grammar;
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  m_syntaxHighlighter->setGrammar(grammar);
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};