6663b6c9
 adorian
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#include "integral_layout.h"
#include "char_layout.h"
#include "horizontal_layout.h"
#include <poincare/expression_layout_cursor.h>
#include <string.h>
#include <assert.h>
namespace Poincare {
const uint8_t topSymbolPixel[IntegralLayout::k_symbolHeight][IntegralLayout::k_symbolWidth] = {
{0x00, 0x00, 0xFF, 0xFF},
{0xFF, 0xFF, 0x00, 0xFF},
{0xFF, 0xFF, 0x00, 0x00},
{0xFF, 0xFF, 0x00, 0x00},
};
const uint8_t bottomSymbolPixel[IntegralLayout::k_symbolHeight][IntegralLayout::k_symbolWidth] = {
{0x00, 0x00, 0xFF, 0xFF},
{0x00, 0x00, 0xFF, 0xFF},
{0xFF, 0x00, 0xFF, 0xFF},
{0xFF, 0xFF, 0x00, 0x00},
};
ExpressionLayout * IntegralLayout::clone() const {
IntegralLayout * layout = new IntegralLayout(const_cast<IntegralLayout *>(this)->integrandLayout(), const_cast<IntegralLayout *>(this)->lowerBoundLayout(), const_cast<IntegralLayout *>(this)->upperBoundLayout(), true);
return layout;
}
void IntegralLayout::deleteBeforeCursor(ExpressionLayoutCursor * cursor) {
if (cursor->isEquivalentTo(ExpressionLayoutCursor(integrandLayout(), ExpressionLayoutCursor::Position::Left))) {
// Case: Left of the integrand.
// Delete the layout, keep the integrand.
replaceWithAndMoveCursor(integrandLayout(), true, cursor);
return;
}
ExpressionLayout::deleteBeforeCursor(cursor);
}
ExpressionLayoutCursor IntegralLayout::cursorLeftOf(ExpressionLayoutCursor cursor, bool * shouldRecomputeLayout) {
// Case: Left the upper or lower bound. Go Left of the integral.
if (((upperBoundLayout()
&& cursor.pointedExpressionLayout() == upperBoundLayout())
|| (lowerBoundLayout()
&& cursor.pointedExpressionLayout() == lowerBoundLayout()))
&& cursor.position() == ExpressionLayoutCursor::Position::Left)
{
return ExpressionLayoutCursor(this, ExpressionLayoutCursor::Position::Left);
}
// Case: Left the integrand. Go Right of the lower bound.
if (integrandLayout()
&& cursor.pointedExpressionLayout() == integrandLayout()
&& cursor.position() == ExpressionLayoutCursor::Position::Left)
{
assert(lowerBoundLayout() != nullptr);
return ExpressionLayoutCursor(lowerBoundLayout(), ExpressionLayoutCursor::Position::Right);
}
assert(cursor.pointedExpressionLayout() == this);
// Case: Right of the integral. Go to the integrand.
if (cursor.position() == ExpressionLayoutCursor::Position::Right) {
assert(integrandLayout() != nullptr);
return ExpressionLayoutCursor(integrandLayout(), ExpressionLayoutCursor::Position::Right);
}
assert(cursor.position() == ExpressionLayoutCursor::Position::Left);
// Case: Left of the brackets. Ask the parent.
if (m_parent) {
return m_parent->cursorLeftOf(cursor, shouldRecomputeLayout);
}
return ExpressionLayoutCursor();
}
ExpressionLayoutCursor IntegralLayout::cursorRightOf(ExpressionLayoutCursor cursor, bool * shouldRecomputeLayout) {
// Case: Right the upper or lower bound.
// Go Left of the integrand.
if (((upperBoundLayout()
&& cursor.pointedExpressionLayout() == upperBoundLayout())
|| (lowerBoundLayout()
&& cursor.pointedExpressionLayout() == lowerBoundLayout()))
&& cursor.position() == ExpressionLayoutCursor::Position::Right)
{
assert(integrandLayout() != nullptr);
return ExpressionLayoutCursor(integrandLayout(), ExpressionLayoutCursor::Position::Left);
}
// Case: Right the integrand. Go Right.
if (integrandLayout()
&& cursor.pointedExpressionLayout() == integrandLayout()
&& cursor.position() == ExpressionLayoutCursor::Position::Right)
{
return ExpressionLayoutCursor(this, ExpressionLayoutCursor::Position::Right);
}
assert(cursor.pointedExpressionLayout() == this);
// Case: Left of the integral. Go to the upper bound.
if (cursor.position() == ExpressionLayoutCursor::Position::Left) {
assert(upperBoundLayout() != nullptr);
return ExpressionLayoutCursor(upperBoundLayout(), ExpressionLayoutCursor::Position::Left);
}
assert(cursor.position() == ExpressionLayoutCursor::Position::Right);
// Case: Right. Ask the parent.
if (m_parent) {
return m_parent->cursorRightOf(cursor, shouldRecomputeLayout);
}
return ExpressionLayoutCursor();
}
ExpressionLayoutCursor IntegralLayout::cursorAbove(ExpressionLayoutCursor cursor, bool * shouldRecomputeLayout, bool equivalentPositionVisited) {
// If the cursor is inside the lower bound, move it to the upper bound.
if (lowerBoundLayout() && cursor.pointedExpressionLayout()->hasAncestor(lowerBoundLayout(), true)) {
assert(upperBoundLayout() != nullptr);
return upperBoundLayout()->cursorInDescendantsAbove(cursor, shouldRecomputeLayout);
}
// If the cursor is Left of the integrand, move it to the upper bound.
if (integrandLayout()
&& cursor.isEquivalentTo(ExpressionLayoutCursor(integrandLayout(), ExpressionLayoutCursor::Position::Left)))
{
assert(upperBoundLayout() != nullptr);
return upperBoundLayout()->cursorInDescendantsAbove(cursor, shouldRecomputeLayout);
}
return ExpressionLayout::cursorAbove(cursor, shouldRecomputeLayout, equivalentPositionVisited);
}
ExpressionLayoutCursor IntegralLayout::cursorUnder(ExpressionLayoutCursor cursor, bool * shouldRecomputeLayout, bool equivalentPositionVisited) {
// If the cursor is inside the upper bound, move it to the lower bound.
if (upperBoundLayout() && cursor.pointedExpressionLayout()->hasAncestor(upperBoundLayout(), true)) {
assert(lowerBoundLayout() != nullptr);
return lowerBoundLayout()->cursorInDescendantsUnder(cursor, shouldRecomputeLayout);
}
// If the cursor is Left of the integrand, move it to the lower bound.
if (integrandLayout()
&& cursor.isEquivalentTo(ExpressionLayoutCursor(integrandLayout(), ExpressionLayoutCursor::Position::Left)))
{
assert(lowerBoundLayout() != nullptr);
return lowerBoundLayout()->cursorInDescendantsUnder(cursor, shouldRecomputeLayout);
}
return ExpressionLayout::cursorUnder(cursor, shouldRecomputeLayout, equivalentPositionVisited);
}
int IntegralLayout::writeTextInBuffer(char * buffer, int bufferSize) const {
if (bufferSize == 0) {
return -1;
}
buffer[bufferSize-1] = 0;
// Write the operator name
int numberOfChar = strlcpy(buffer, "int", bufferSize);
if (numberOfChar >= bufferSize-1) {
return bufferSize-1;
}
// Write the opening parenthesis
buffer[numberOfChar++] = '(';
if (numberOfChar >= bufferSize-1) {
return bufferSize-1;
}
// Write the argument
numberOfChar += const_cast<IntegralLayout *>(this)->integrandLayout()->writeTextInBuffer(buffer+numberOfChar, bufferSize-numberOfChar);
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
// Write the comma
buffer[numberOfChar++] = ',';
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
// Write the lower bound
numberOfChar += const_cast<IntegralLayout *>(this)->lowerBoundLayout()->writeTextInBuffer(buffer+numberOfChar, bufferSize-numberOfChar);
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
// Write the comma
buffer[numberOfChar++] = ',';
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
// Write the upper bound
numberOfChar += const_cast<IntegralLayout *>(this)->upperBoundLayout()->writeTextInBuffer(buffer+numberOfChar, bufferSize-numberOfChar);
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
// Write the closing parenthesis
buffer[numberOfChar++] = ')';
buffer[numberOfChar] = 0;
return numberOfChar;
}
void IntegralLayout::render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) {
KDSize integrandSize = integrandLayout()->size();
KDSize upperBoundSize = upperBoundLayout()->size();
KDColor workingBuffer[k_symbolWidth*k_symbolHeight];
// Render the integral symbol.
KDRect topSymbolFrame(p.x() + k_symbolWidth + k_lineThickness, p.y() + upperBoundSize.height() - k_boundHeightMargin,
k_symbolWidth, k_symbolHeight);
ctx->blendRectWithMask(topSymbolFrame, expressionColor, (const uint8_t *)topSymbolPixel, (KDColor *)workingBuffer);
KDRect bottomSymbolFrame(p.x(),
p.y() + upperBoundSize.height() + 2*k_integrandHeigthMargin + integrandSize.height() + k_boundHeightMargin - k_symbolHeight,
k_symbolWidth, k_symbolHeight);
ctx->blendRectWithMask(bottomSymbolFrame, expressionColor, (const uint8_t *)bottomSymbolPixel, (KDColor *)workingBuffer);
ctx->fillRect(KDRect(p.x() + k_symbolWidth, p.y() + upperBoundSize.height() - k_boundHeightMargin, k_lineThickness,
2*k_boundHeightMargin+2*k_integrandHeigthMargin+integrandSize.height()), expressionColor);
// Render "dx".
CharLayout * dummydx = new CharLayout('d');
HorizontalLayout dummyLayout(integrandLayout()->clone(), dummydx, false);
KDPoint dxPosition = dummyLayout.positionOfChild(dummydx);
ctx->drawString("dx", dxPosition.translatedBy(p).translatedBy(positionOfChild(integrandLayout())), dummydx->fontSize(), expressionColor, backgroundColor);
}
KDSize IntegralLayout::computeSize() {
KDSize dxSize = HorizontalLayout(new CharLayout('d'), new CharLayout('x'), false).size();
KDSize integrandSize = integrandLayout()->size();
KDSize lowerBoundSize = lowerBoundLayout()->size();
KDSize upperBoundSize = upperBoundLayout()->size();
return KDSize(
k_symbolWidth+k_lineThickness+k_boundWidthMargin+max(lowerBoundSize.width(), upperBoundSize.width())+k_integrandWidthMargin+integrandSize.width()+dxSize.width(),
upperBoundSize.height()+ 2*k_integrandHeigthMargin+max(integrandSize.height(), dxSize.height())+lowerBoundSize.height());
}
void IntegralLayout::computeBaseline() {
m_baseline = upperBoundLayout()->size().height() + k_integrandHeigthMargin + integrandLayout()->baseline();
m_baselined = true;
}
KDPoint IntegralLayout::positionOfChild(ExpressionLayout * child) {
KDSize integrandSize = integrandLayout()->size();
KDSize lowerBoundSize = lowerBoundLayout()->size();
KDSize upperBoundSize = upperBoundLayout()->size();
KDCoordinate x = 0;
KDCoordinate y = 0;
if (child == lowerBoundLayout()) {
x = k_symbolWidth+k_lineThickness+k_boundWidthMargin;
y = upperBoundSize.height()+2*k_integrandHeigthMargin+integrandSize.height();
} else if (child == upperBoundLayout()) {
x = k_symbolWidth+k_lineThickness+k_boundWidthMargin;;
y = 0;
} else if (child == integrandLayout()) {
x = k_symbolWidth +k_lineThickness+ k_boundWidthMargin+max(lowerBoundSize.width(), upperBoundSize.width())+k_integrandWidthMargin;
y = upperBoundSize.height()+k_integrandHeigthMargin;
} else {
assert(false);
}
return KDPoint(x,y);
}
}
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