char_layout.cpp
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#include "char_layout.h"
#include <poincare/expression_layout_cursor.h>
#include <ion/charset.h>
#include <assert.h>
#include <stdlib.h>
namespace Poincare {
CharLayout::CharLayout(char c, KDText::FontSize fontSize) :
StaticLayoutHierarchy<0>(),
m_char(c),
m_fontSize(fontSize)
{
}
ExpressionLayout * CharLayout::clone() const {
CharLayout * layout = new CharLayout(m_char, m_fontSize);
return layout;
}
ExpressionLayoutCursor CharLayout::cursorLeftOf(ExpressionLayoutCursor cursor, bool * shouldRecomputeLayout) {
assert(cursor.pointedExpressionLayout() == this);
// Case: Right. Go Left.
if (cursor.position() == ExpressionLayoutCursor::Position::Right) {
return ExpressionLayoutCursor(this, ExpressionLayoutCursor::Position::Left);
}
// Case: Left. Ask the parent.
if (m_parent) {
return m_parent->cursorLeftOf(cursor, shouldRecomputeLayout);
}
return ExpressionLayoutCursor();
}
ExpressionLayoutCursor CharLayout::cursorRightOf(ExpressionLayoutCursor cursor, bool * shouldRecomputeLayout) {
assert(cursor.pointedExpressionLayout() == this);
// Case: Left. Go Right.
if (cursor.position() == ExpressionLayoutCursor::Position::Left) {
return ExpressionLayoutCursor(this, ExpressionLayoutCursor::Position::Right);
}
// Case: Right. Ask the parent.
if (m_parent) {
return m_parent->cursorRightOf(cursor, shouldRecomputeLayout);
}
return ExpressionLayoutCursor();
}
bool CharLayout::isCollapsable(int * numberOfOpenParenthesis, bool goingLeft) const {
if (*numberOfOpenParenthesis <= 0
&& (m_char == '+'
|| m_char == '-'
|| m_char == '*'
|| m_char == Ion::Charset::MultiplicationSign
|| m_char == Ion::Charset::MiddleDot
|| m_char == Ion::Charset::Sto
|| m_char == '='
|| m_char == ','))
{
return false;
}
return true;
}
void CharLayout::render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) {
char string[2] = {m_char, 0};
ctx->drawString(string, p, m_fontSize, expressionColor, backgroundColor);
}
KDSize CharLayout::computeSize() {
return KDText::charSize(m_fontSize);
}
void CharLayout::computeBaseline() {
// Half height of the font.
m_baseline = (KDText::charSize(m_fontSize).height()+1)/2;
m_baselined = true;
}
}