6663b6c9
 adorian
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#include <poincare/layout_engine.h>
#include "layout/char_layout.h"
#include "layout/horizontal_layout.h"
#include "layout/left_parenthesis_layout.h"
#include "layout/right_parenthesis_layout.h"
#include "layout/vertical_offset_layout.h"
#include<assert.h>
namespace Poincare {
ExpressionLayout * LayoutEngine::createInfixLayout(const Expression * expression, PrintFloat::Mode floatDisplayMode, int numberOfSignificantDigits, const char * operatorName) {
int numberOfOperands = expression->numberOfOperands();
assert(numberOfOperands > 1);
HorizontalLayout * result = new HorizontalLayout();
result->addOrMergeChildAtIndex(expression->operand(0)->createLayout(floatDisplayMode, numberOfSignificantDigits), 0, true);
for (int i = 1; i < numberOfOperands; i++) {
result->addOrMergeChildAtIndex(createStringLayout(operatorName, strlen(operatorName)), result->numberOfChildren(), true);
result->addOrMergeChildAtIndex(
expression->operand(i)->type() == Expression::Type::Opposite ?
createParenthesedLayout(expression->operand(i)->createLayout(floatDisplayMode, numberOfSignificantDigits), false) :
expression->operand(i)->createLayout(floatDisplayMode, numberOfSignificantDigits),
result->numberOfChildren(), true);
}
return result;
}
ExpressionLayout * LayoutEngine::createPrefixLayout(const Expression * expression, PrintFloat::Mode floatDisplayMode, int numberOfSignificantDigits, const char * operatorName) {
HorizontalLayout * result = new HorizontalLayout();
// Add the operator name.
result->addOrMergeChildAtIndex(createStringLayout(operatorName, strlen(operatorName)), 0, true);
// Create the layout of arguments separated by commas.
ExpressionLayout * args = nullptr;
int numberOfOperands = expression->numberOfOperands();
if (numberOfOperands > 0) {
args = new HorizontalLayout();
HorizontalLayout * horizontalArgs = static_cast<HorizontalLayout *>(args);
horizontalArgs->addOrMergeChildAtIndex(expression->operand(0)->createLayout(floatDisplayMode, numberOfSignificantDigits), 0, true);
for (int i = 1; i < numberOfOperands; i++) {
horizontalArgs->addChildAtIndex(new CharLayout(','), args->numberOfChildren());
horizontalArgs->addOrMergeChildAtIndex(expression->operand(i)->createLayout(floatDisplayMode, numberOfSignificantDigits), horizontalArgs->numberOfChildren(), true);
}
}
// Add the parenthesed arguments.
result->addOrMergeChildAtIndex(createParenthesedLayout(args, false), result->numberOfChildren(), true);
return result;
}
ExpressionLayout * LayoutEngine::createParenthesedLayout(ExpressionLayout * layout, bool cloneLayout) {
HorizontalLayout * result = new HorizontalLayout();
result->addChildAtIndex(new LeftParenthesisLayout(), 0);
if (layout != nullptr) {
result->addOrMergeChildAtIndex(cloneLayout ? layout->clone() : layout, 1, true);
}
result->addChildAtIndex(new RightParenthesisLayout(), result->numberOfChildren());
return result;
}
ExpressionLayout * LayoutEngine::createStringLayout(const char * buffer, int bufferSize, KDText::FontSize fontSize) {
assert(bufferSize > 0);
HorizontalLayout * resultLayout = new HorizontalLayout();
for (int i = 0; i < bufferSize; i++) {
resultLayout->addChildAtIndex(new CharLayout(buffer[i], fontSize), i);
}
return resultLayout;
}
ExpressionLayout * LayoutEngine::createLogLayout(ExpressionLayout * argument, ExpressionLayout * index) {
HorizontalLayout * resultLayout = static_cast<HorizontalLayout *>(createStringLayout("log", 3));
VerticalOffsetLayout * offsetLayout = new VerticalOffsetLayout(index, VerticalOffsetLayout::Type::Subscript, false);
resultLayout->addChildAtIndex(offsetLayout, resultLayout->numberOfChildren());
resultLayout->addOrMergeChildAtIndex(createParenthesedLayout(argument, false), resultLayout->numberOfChildren(), true);
return resultLayout;
}
int LayoutEngine::writeInfixExpressionTextInBuffer(const Expression * expression, char * buffer, int bufferSize, PrintFloat::Mode floatDisplayMode, int numberOfDigits, const char * operatorName) {
return writeInfixExpressionOrExpressionLayoutTextInBuffer(expression, nullptr, buffer, bufferSize,floatDisplayMode, numberOfDigits, operatorName, 0, -1, [](const char * operatorName) { return true; });
}
int LayoutEngine::writePrefixExpressionTextInBuffer(const Expression * expression, char * buffer, int bufferSize, PrintFloat::Mode floatDisplayMode, int numberOfDigits, const char * operatorName) {
return writePrefixExpressionOrExpressionLayoutTextInBuffer(expression, nullptr, buffer, bufferSize, floatDisplayMode, numberOfDigits, operatorName);
}
int LayoutEngine::writeInfixExpressionLayoutTextInBuffer(const ExpressionLayout * expressionLayout, char * buffer, int bufferSize, const char * operatorName, int firstChildIndex, int lastChildIndex, ChildNeedsParenthesis childNeedsParenthesis) {
return writeInfixExpressionOrExpressionLayoutTextInBuffer(nullptr, expressionLayout, buffer, bufferSize, PrintFloat::Mode::Decimal, PrintFloat::k_numberOfStoredSignificantDigits, operatorName, firstChildIndex, lastChildIndex, childNeedsParenthesis);
}
int LayoutEngine::writePrefixExpressionLayoutTextInBuffer(const ExpressionLayout * expressionLayout, char * buffer, int bufferSize, const char * operatorName, bool writeFirstChild) {
return writePrefixExpressionOrExpressionLayoutTextInBuffer(nullptr, expressionLayout, buffer, bufferSize, PrintFloat::Mode::Decimal, PrintFloat::k_numberOfStoredSignificantDigits, operatorName, writeFirstChild);
}
int LayoutEngine::writeInfixExpressionOrExpressionLayoutTextInBuffer(const Expression * expression, const ExpressionLayout * expressionLayout, char * buffer, int bufferSize, PrintFloat::Mode floatDisplayMode, int numberOfDigits, const char * operatorName, int firstChildIndex, int lastChildIndex, ChildNeedsParenthesis childNeedsParenthesis) {
assert(expression != nullptr || expressionLayout != nullptr);
if (bufferSize == 0) {
return -1;
}
buffer[bufferSize-1] = 0;
int numberOfChar = 0;
int numberOfOperands = (expression != nullptr) ? expression->numberOfOperands() : expressionLayout->numberOfChildren();
assert(numberOfOperands > 0);
if (numberOfChar >= bufferSize-1) {
return bufferSize-1;
}
if ((expression != nullptr && expression->operand(firstChildIndex)->needParenthesisWithParent(expression))
|| (expression == nullptr && childNeedsParenthesis(operatorName)))
{
buffer[numberOfChar++] = '(';
if (numberOfChar >= bufferSize-1) {
return bufferSize-1;
}
}
numberOfChar += (expression != nullptr) ? expression->operand(firstChildIndex)->writeTextInBuffer(buffer+numberOfChar, bufferSize-numberOfChar, floatDisplayMode, numberOfDigits) : expressionLayout->child(firstChildIndex)->writeTextInBuffer(buffer+numberOfChar, bufferSize-numberOfChar);
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
if ((expression != nullptr && expression->operand(firstChildIndex)->needParenthesisWithParent(expression))
|| (expression == nullptr && childNeedsParenthesis(operatorName)))
{
buffer[numberOfChar++] = ')';
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
}
int lastIndex = lastChildIndex < 0 ? numberOfOperands - 1 : lastChildIndex;
for (int i = firstChildIndex + 1; i < lastIndex+1; i++) {
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
numberOfChar += strlcpy(buffer+numberOfChar, operatorName, bufferSize-numberOfChar);
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
if ((expression != nullptr && expression->operand(i)->needParenthesisWithParent(expression))
|| (expression == nullptr && childNeedsParenthesis(operatorName)))
{
buffer[numberOfChar++] = '(';
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
}
numberOfChar += (expression != nullptr) ? expression->operand(i)->writeTextInBuffer(buffer+numberOfChar, bufferSize-numberOfChar, floatDisplayMode, numberOfDigits) : expressionLayout->child(i)->writeTextInBuffer(buffer+numberOfChar, bufferSize-numberOfChar);
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
if ((expression != nullptr && expression->operand(i)->needParenthesisWithParent(expression))
|| (expression == nullptr && childNeedsParenthesis(operatorName)))
{
buffer[numberOfChar++] = ')';
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
}
}
buffer[numberOfChar] = 0;
return numberOfChar;
}
int LayoutEngine::writePrefixExpressionOrExpressionLayoutTextInBuffer(const Expression * expression, const ExpressionLayout * expressionLayout, char * buffer, int bufferSize, PrintFloat::Mode floatDisplayMode, int numberOfDigits, const char * operatorName, bool writeFirstChild) {
assert(expression != nullptr || expressionLayout != nullptr);
if (bufferSize == 0) {
return -1;
}
buffer[bufferSize-1] = 0;
int numberOfChar = strlcpy(buffer, operatorName, bufferSize);
if (numberOfChar >= bufferSize-1) {
return bufferSize-1;
}
buffer[numberOfChar++] = '(';
if (numberOfChar >= bufferSize-1) {
return bufferSize-1;
}
int numberOfOperands = (expression != nullptr) ? expression->numberOfOperands() : expressionLayout->numberOfChildren();
if (numberOfOperands > 0) {
if (!writeFirstChild) {
assert(numberOfOperands > 1);
}
int firstOperandIndex = writeFirstChild ? 0 : 1;
numberOfChar += (expression != nullptr) ? expression->operand(firstOperandIndex)->writeTextInBuffer(buffer+numberOfChar, bufferSize-numberOfChar, floatDisplayMode, numberOfDigits) : expressionLayout->child(firstOperandIndex)->writeTextInBuffer(buffer+numberOfChar, bufferSize-numberOfChar);
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
for (int i = firstOperandIndex + 1; i < numberOfOperands; i++) {
buffer[numberOfChar++] = ',';
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
numberOfChar += (expression != nullptr) ? expression->operand(i)->writeTextInBuffer(buffer+numberOfChar, bufferSize-numberOfChar, floatDisplayMode, numberOfDigits) : expressionLayout->child(i)->writeTextInBuffer(buffer+numberOfChar, bufferSize-numberOfChar);
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
}
}
buffer[numberOfChar++] = ')';
buffer[numberOfChar] = 0;
return numberOfChar;
}
int LayoutEngine::writeOneCharInBuffer(char * buffer, int bufferSize, char charToWrite) {
if (bufferSize == 0) {
return -1;
}
buffer[bufferSize-1] = 0;
if (bufferSize == 1) {
return 0;
}
buffer[0] = charToWrite;
buffer[1] = 0;
return 1;
}
}
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