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#include "TextBox.h"
#include "Painter.h"
#include "Font.h"
#include "CBitmap.h"
#include <AK/StdLib.h>
TextBox::TextBox(Widget* parent)
: Widget(parent)
{
startTimer(500);
}
TextBox::~TextBox()
{
}
void TextBox::setText(String&& text)
{
m_text = std::move(text);
m_cursorPosition = m_text.length();
update();
}
void TextBox::paintEvent(PaintEvent&)
{
Painter painter(*this);
// FIXME: Reduce overdraw.
painter.fillRect(rect(), backgroundColor());
painter.drawRect(rect(), foregroundColor());
if (isFocused())
painter.drawFocusRect(rect());
Rect innerRect = rect();
innerRect.shrink(6, 6);
unsigned maxCharsToPaint = innerRect.width() / font().glyphWidth();
int firstVisibleChar = max((int)m_cursorPosition - (int)maxCharsToPaint, 0);
unsigned charsToPaint = min(m_text.length() - firstVisibleChar, maxCharsToPaint);
int y = innerRect.center().y() - font().glyphHeight() / 2;
for (unsigned i = 0; i < charsToPaint; ++i) {
char ch = m_text[firstVisibleChar + i];
if (ch == ' ')
continue;
int x = innerRect.x() + (i * font().glyphWidth());
auto* bitmap = font().glyphBitmap(ch);
if (!bitmap) {
printf("TextBox: glyph missing: %02x\n", ch);
ASSERT_NOT_REACHED();
}
painter.drawBitmap({x, y}, *bitmap, Color::Black);
}
if (isFocused() && m_cursorBlinkState) {
unsigned visibleCursorPosition = m_cursorPosition - firstVisibleChar;
Rect cursorRect(innerRect.x() + visibleCursorPosition * font().glyphWidth(), innerRect.y(), 1, innerRect.height());
painter.fillRect(cursorRect, foregroundColor());
}
}
void TextBox::mouseDownEvent(MouseEvent&)
{
}
void TextBox::handleBackspace()
{
if (m_cursorPosition == 0)
return;
if (m_text.length() == 1) {
m_text = String::empty();
m_cursorPosition = 0;
update();
return;
}
char* buffer;
auto newText = StringImpl::createUninitialized(m_text.length() - 1, buffer);
memcpy(buffer, m_text.characters(), m_cursorPosition - 1);
memcpy(buffer + m_cursorPosition - 1, m_text.characters() + m_cursorPosition, m_text.length() - (m_cursorPosition - 1));
m_text = std::move(newText);
--m_cursorPosition;
update();
}
void TextBox::keyDownEvent(KeyEvent& event)
{
switch (event.key()) {
case KeyboardKey::LeftArrow:
if (m_cursorPosition)
--m_cursorPosition;
m_cursorBlinkState = true;
update();
return;
case KeyboardKey::RightArrow:
if (m_cursorPosition < m_text.length())
++m_cursorPosition;
m_cursorBlinkState = true;
update();
return;
case KeyboardKey::Backspace:
return handleBackspace();
case KeyboardKey::Return:
if (onReturnPressed)
onReturnPressed(*this);
return;
}
if (!event.text().isEmpty()) {
ASSERT(event.text().length() == 1);
char* buffer;
auto newText = StringImpl::createUninitialized(m_text.length() + 1, buffer);
memcpy(buffer, m_text.characters(), m_cursorPosition);
buffer[m_cursorPosition] = event.text()[0];
memcpy(buffer + m_cursorPosition + 1, m_text.characters() + m_cursorPosition, m_text.length() - m_cursorPosition);
m_text = std::move(newText);
++m_cursorPosition;
update();
return;
}
}
void TextBox::timerEvent(TimerEvent&)
{
// FIXME: Disable the timer when not focused.
if (!isFocused())
return;
m_cursorBlinkState = !m_cursorBlinkState;
update();
}
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