#include "elidedlabel.h"

#include <QDebug>
#include <QPainter>
#include <QResizeEvent>
#include <QStyle>

ElidedLabel::ElidedLabel(QWidget *parent, Qt::WindowFlags f)
    : QLabel(parent, f), m_elide_mode(Qt::ElideRight) {
  setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Preferred);
}

ElidedLabel::ElidedLabel(const QString &txt, QWidget *parent, Qt::WindowFlags f)
    : QLabel(txt, parent, f), m_elide_mode(Qt::ElideRight) {
  setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Preferred);
}

ElidedLabel::ElidedLabel(const QString &txt, Qt::TextElideMode elideMode,
                         QWidget *parent, Qt::WindowFlags f)
    : QLabel(txt, parent, f), m_elide_mode(elideMode) {
  setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Preferred);
}

void ElidedLabel::setText(const QString &txt) {
  QLabel::setText(txt);
  cacheElidedText(geometry().width());
  setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Preferred);
}

void ElidedLabel::cacheElidedText(int w) {
  m_cached_elided_text = fontMetrics().elidedText(
      text(), m_elide_mode, w, (buddy() == nullptr) ? 0 : Qt::TextShowMnemonic);
}

void ElidedLabel::resizeEvent(QResizeEvent *e) {
  QLabel::resizeEvent(e);
  cacheElidedText(e->size().width());
}

void ElidedLabel::paintEvent(QPaintEvent *e) {
  if (m_elide_mode == Qt::ElideNone) {
    QLabel::paintEvent(e);
  } else {
    QPainter p(this);
    p.drawText(0, 0, geometry().width(), geometry().height(),
               QStyle::visualAlignment(text().isRightToLeft() ? Qt::RightToLeft
                                                              : Qt::LeftToRight,
                                       alignment()) |
                   ((buddy() == nullptr) ? 0 : Qt::TextShowMnemonic),
               m_cached_elided_text);
  }
}