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 adorian
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#include "nth_root_layout.h"
#include "horizontal_layout.h"
#include <ion/charset.h>
#include <poincare/expression_layout_cursor.h>
#include <string.h>
#include <assert.h>
namespace Poincare {
static inline uint16_t max(uint16_t x, uint16_t y) { return (x>y ? x : y); }
const uint8_t radixPixel[NthRootLayout::k_leftRadixHeight][NthRootLayout::k_leftRadixWidth] = {
{0x54, 0xCB, 0xFF, 0xFF, 0xFF},
{0xC6, 0x5A, 0xFF, 0xFF, 0xFF},
{0xFF, 0x7D, 0xA2, 0xFF, 0xFF},
{0xFF, 0xFF, 0X4A, 0xD7, 0xFF},
{0xFF, 0xFF, 0xB2, 0x6D, 0xFF},
{0xFF, 0xFF, 0xFF, 0x65, 0xB9},
{0xFF, 0xFF, 0xFF, 0xD4, 0x4C},
{0xFF, 0xFF, 0xFF, 0xFF, 0xDE},
};
ExpressionLayout * NthRootLayout::clone() const {
if (numberOfChildren() == 1) {
return new NthRootLayout(const_cast<NthRootLayout *>(this)->radicandLayout(), true);
}
assert(numberOfChildren() == 2);
return new NthRootLayout(const_cast<NthRootLayout *>(this)->radicandLayout(), const_cast<NthRootLayout *>(this)->indexLayout(), true);
}
void NthRootLayout::collapseSiblingsAndMoveCursor(ExpressionLayoutCursor * cursor) {
// If the radicand layout is not an HorizontalLayout, replace it with one.
if (!radicandLayout()->isHorizontal()) {
ExpressionLayout * previousRadicand = radicandLayout();
HorizontalLayout * horizontalRadicandLayout = new HorizontalLayout(previousRadicand, false);
replaceChild(previousRadicand, horizontalRadicandLayout, false);
}
ExpressionLayout::collapseOnDirection(HorizontalDirection::Right, 0);
cursor->setPointedExpressionLayout(radicandLayout());
cursor->setPosition(ExpressionLayoutCursor::Position::Left);
}
void NthRootLayout::deleteBeforeCursor(ExpressionLayoutCursor * cursor) {
if (cursor->pointedExpressionLayout() == radicandLayout()
&& cursor->position() == ExpressionLayoutCursor::Position::Left)
{
// Case: Left of the radicand. Delete the layout, keep the radicand.
replaceWithAndMoveCursor(radicandLayout(), true, cursor);
return;
}
ExpressionLayout::deleteBeforeCursor(cursor);
}
ExpressionLayoutCursor NthRootLayout::cursorLeftOf(ExpressionLayoutCursor cursor, bool * shouldRecomputeLayout) {
// Case: Left of the radicand. Go the index if any, else go Left of the root.
if (radicandLayout()
&& cursor.pointedExpressionLayout() == radicandLayout()
&& cursor.position() == ExpressionLayoutCursor::Position::Left)
{
if (indexLayout()) {
return ExpressionLayoutCursor(indexLayout(), ExpressionLayoutCursor::Position::Right);
}
return ExpressionLayoutCursor(this, ExpressionLayoutCursor::Position::Left);
}
// Case: Left of the index. Go Left of the root.
if (indexLayout()
&& cursor.pointedExpressionLayout() == indexLayout()
&& cursor.position() == ExpressionLayoutCursor::Position::Left)
{
return ExpressionLayoutCursor(this, ExpressionLayoutCursor::Position::Left);
}
assert(cursor.pointedExpressionLayout() == this);
// Case: Right. Go Right of the radicand.
if (cursor.position() == ExpressionLayoutCursor::Position::Right) {
assert(radicandLayout() != nullptr);
return ExpressionLayoutCursor(radicandLayout(), ExpressionLayoutCursor::Position::Right);
}
assert(cursor.position() == ExpressionLayoutCursor::Position::Left);
// Case: Left. Ask the parent.
if (m_parent) {
return m_parent->cursorLeftOf(cursor, shouldRecomputeLayout);
}
return ExpressionLayoutCursor();
}
ExpressionLayoutCursor NthRootLayout::cursorRightOf(ExpressionLayoutCursor cursor, bool * shouldRecomputeLayout) {
// Case: Right of the radicand. Go the Right of the root.
if (radicandLayout()
&& cursor.pointedExpressionLayout() == radicandLayout()
&& cursor.position() == ExpressionLayoutCursor::Position::Right)
{
return ExpressionLayoutCursor(this, ExpressionLayoutCursor::Position::Right);
}
// Case: Right of the index. Go Left of the integrand.
if (indexLayout()
&& cursor.pointedExpressionLayout() == indexLayout()
&& cursor.position() == ExpressionLayoutCursor::Position::Right)
{
assert(radicandLayout() != nullptr);
return ExpressionLayoutCursor(radicandLayout(), ExpressionLayoutCursor::Position::Left);
}
assert(cursor.pointedExpressionLayout() == this);
// Case: Left. Go index if there is one, else go to the radicand.
if (cursor.position() == ExpressionLayoutCursor::Position::Left) {
if (indexLayout()) {
return ExpressionLayoutCursor(indexLayout(), ExpressionLayoutCursor::Position::Left);
}
assert(radicandLayout() != nullptr);
return ExpressionLayoutCursor(radicandLayout(), 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 NthRootLayout::cursorAbove(ExpressionLayoutCursor cursor, bool * shouldRecomputeLayout, bool equivalentPositionVisited) {
// If the cursor is Left of the radicand, move it to the index.
if (indexLayout()
&& radicandLayout()
&& cursor.isEquivalentTo(ExpressionLayoutCursor(radicandLayout(), ExpressionLayoutCursor::Position::Left)))
{
return ExpressionLayoutCursor(indexLayout(), ExpressionLayoutCursor::Position::Right);
}
// If the cursor is Left, move it to the index.
if (indexLayout()
&& cursor.pointedExpressionLayout() == this
&& cursor.position() == ExpressionLayoutCursor::Position::Left)
{
return ExpressionLayoutCursor(indexLayout(), ExpressionLayoutCursor::Position::Left);
}
return ExpressionLayout::cursorAbove(cursor, shouldRecomputeLayout, equivalentPositionVisited);
}
ExpressionLayoutCursor NthRootLayout::cursorUnder(ExpressionLayoutCursor cursor, bool * shouldRecomputeLayout, bool equivalentPositionVisited) {
if (indexLayout() && cursor.pointedExpressionLayout()->hasAncestor(indexLayout(), true)) {
// If the cursor is Right of the index, move it to the radicand.
if (cursor.isEquivalentTo(ExpressionLayoutCursor(indexLayout(), ExpressionLayoutCursor::Position::Right))) {
assert(radicandLayout() != nullptr);
return ExpressionLayoutCursor(radicandLayout(), ExpressionLayoutCursor::Position::Left);
}
// If the cursor is Left of the index, move it Left .
if (cursor.isEquivalentTo(ExpressionLayoutCursor(indexLayout(), ExpressionLayoutCursor::Position::Left))) {
return ExpressionLayoutCursor(this, ExpressionLayoutCursor::Position::Left);
}
}
return ExpressionLayout::cursorUnder(cursor, shouldRecomputeLayout, equivalentPositionVisited);
}
static_assert('\x91' == Ion::Charset::Root, "Unicode error");
int NthRootLayout::writeTextInBuffer(char * buffer, int bufferSize) const {
// Case: root(x,n)
if (numberOfChildren() == 2
&& (const_cast<NthRootLayout *>(this))->indexLayout()
&& !(const_cast<NthRootLayout *>(this))->indexLayout()->isEmpty())
{
return LayoutEngine::writePrefixExpressionLayoutTextInBuffer(this, buffer, bufferSize, "root");
}
// Case: squareRoot(x)
if (numberOfChildren() == 1) {
return LayoutEngine::writePrefixExpressionLayoutTextInBuffer(this, buffer, bufferSize, "\x91");
}
// Case: root(x,empty)
// Write "'SquareRootSymbol'('radicandLayout')".
assert((const_cast<NthRootLayout *>(this))->indexLayout() && (const_cast<NthRootLayout *>(this))->indexLayout()->isEmpty());
if (bufferSize == 0) {
return -1;
}
buffer[bufferSize-1] = 0;
int numberOfChar = 0;
buffer[numberOfChar++] = '\x91';
if (numberOfChar >= bufferSize-1) {
return bufferSize-1;
}
buffer[numberOfChar++] = '(';
if (numberOfChar >= bufferSize-1) {
return bufferSize-1;
}
numberOfChar += (const_cast<NthRootLayout *>(this))->radicandLayout()->writeTextInBuffer(buffer+numberOfChar, bufferSize-numberOfChar);
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
buffer[numberOfChar++] = ')';
buffer[numberOfChar] = 0;
return numberOfChar;
}
void NthRootLayout::render(KDContext * ctx, KDPoint p, KDColor expressionColor, KDColor backgroundColor) {
KDSize radicandSize = radicandLayout()->size();
KDSize indexSize = adjustedIndexSize();
KDColor workingBuffer[k_leftRadixWidth*k_leftRadixHeight];
KDRect leftRadixFrame(p.x() + indexSize.width() + k_widthMargin - k_leftRadixWidth,
p.y() + baseline() + radicandSize.height() - radicandLayout()->baseline() + k_heightMargin - k_leftRadixHeight,
k_leftRadixWidth, k_leftRadixHeight);
ctx->blendRectWithMask(leftRadixFrame, expressionColor, (const uint8_t *)radixPixel, (KDColor *)workingBuffer);
// If the indice is higher than the root.
if (indexSize.height() + k_indexHeight > radicandLayout()->baseline() + k_radixLineThickness + k_heightMargin) {
// Vertical radix bar
ctx->fillRect(KDRect(p.x() + indexSize.width() + k_widthMargin,
p.y() + indexSize.height() + k_indexHeight - radicandLayout()->baseline() - k_radixLineThickness - k_heightMargin,
k_radixLineThickness,
radicandSize.height() + 2*k_heightMargin + k_radixLineThickness), expressionColor);
// Horizontal radix bar
ctx->fillRect(KDRect(p.x() + indexSize.width() + k_widthMargin,
p.y() + indexSize.height() + k_indexHeight - radicandLayout()->baseline() - k_radixLineThickness - k_heightMargin,
radicandSize.width() + 2*k_widthMargin + k_radixHorizontalOverflow,
k_radixLineThickness), expressionColor);
// Right radix bar
ctx->fillRect(KDRect(p.x() + indexSize.width() + k_widthMargin + radicandSize.width() + 2*k_widthMargin + k_radixHorizontalOverflow,
p.y() + indexSize.height() + k_indexHeight - radicandLayout()->baseline() - k_radixLineThickness - k_heightMargin,
k_radixLineThickness,
k_rightRadixHeight + k_radixLineThickness), expressionColor);
} else {
ctx->fillRect(KDRect(p.x() + indexSize.width() + k_widthMargin,
p.y(),
k_radixLineThickness,
radicandSize.height() + 2*k_heightMargin + k_radixLineThickness), expressionColor);
ctx->fillRect(KDRect(p.x() + indexSize.width() + k_widthMargin,
p.y(),
radicandSize.width() + 2*k_widthMargin + k_radixHorizontalOverflow,
k_radixLineThickness), expressionColor);
ctx->fillRect(KDRect(p.x() + indexSize.width() + k_widthMargin + radicandSize.width() + 2*k_widthMargin + k_radixHorizontalOverflow,
p.y(),
k_radixLineThickness,
k_rightRadixHeight + k_radixLineThickness), expressionColor);
}
}
KDSize NthRootLayout::computeSize() {
KDSize radicandSize = radicandLayout()->size();
KDSize indexSize = adjustedIndexSize();
return KDSize(
indexSize.width() + 3*k_widthMargin + 2*k_radixLineThickness + radicandSize.width() + k_radixHorizontalOverflow,
baseline() + radicandSize.height() - radicandLayout()->baseline() + k_heightMargin
);
}
void NthRootLayout::computeBaseline() {
if (indexLayout() != nullptr) {
m_baseline = max(radicandLayout()->baseline() + k_radixLineThickness + k_heightMargin,
indexLayout()->size().height() + k_indexHeight);
} else {
m_baseline = radicandLayout()->baseline() + k_radixLineThickness + k_heightMargin;
}
m_baselined = true;
}
KDPoint NthRootLayout::positionOfChild(ExpressionLayout * child) {
KDCoordinate x = 0;
KDCoordinate y = 0;
KDSize indexSize = adjustedIndexSize();
if (child == radicandLayout()) {
x = indexSize.width() + 2*k_widthMargin + k_radixLineThickness;
y = baseline() - radicandLayout()->baseline();
} else if (indexLayout() && child == indexLayout()) {
x = 0;
y = baseline() - indexSize.height() - k_indexHeight;
} else {
assert(false);
}
return KDPoint(x,y);
}
KDSize NthRootLayout::adjustedIndexSize() {
return indexLayout() != nullptr ? KDSize(max(k_leftRadixWidth, indexLayout()->size().width()), indexLayout()->size().height()) : KDSize(k_leftRadixWidth,0);
}
}
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