layout_engine.cpp
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#include <poincare/layout_engine.h>
#include "layout/string_layout.h"
#include "layout/parenthesis_layout.h"
#include "layout/horizontal_layout.h"
extern "C" {
#include<assert.h>
}
namespace Poincare {
ExpressionLayout * LayoutEngine::createInfixLayout(const Expression * expression, Expression::FloatDisplayMode floatDisplayMode, Expression::ComplexFormat complexFormat, const char * operatorName) {
assert(floatDisplayMode != Expression::FloatDisplayMode::Default);
assert(complexFormat != Expression::ComplexFormat::Default);
int numberOfOperands = expression->numberOfOperands();
assert(numberOfOperands > 1);
ExpressionLayout** children_layouts = new ExpressionLayout * [2*numberOfOperands-1];
children_layouts[0] = expression->operand(0)->createLayout();
for (int i=1; i<numberOfOperands; i++) {
children_layouts[2*i-1] = new StringLayout(operatorName, 1);
children_layouts[2*i] = expression->operand(i)->type() == Expression::Type::Opposite ? new ParenthesisLayout(expression->operand(i)->createLayout(floatDisplayMode, complexFormat)) : expression->operand(i)->createLayout(floatDisplayMode, complexFormat);
}
/* HorizontalLayout holds the children layouts so they do not need to be
* deleted here. */
ExpressionLayout * layout = new HorizontalLayout(children_layouts, 2*numberOfOperands-1);
delete[] children_layouts;
return layout;
}
ExpressionLayout * LayoutEngine::createPrefixLayout(const Expression * expression, Expression::FloatDisplayMode floatDisplayMode, Expression::ComplexFormat complexFormat, const char * operatorName) {
assert(floatDisplayMode != Expression::FloatDisplayMode::Default);
assert(complexFormat != Expression::ComplexFormat::Default);
int numberOfOperands = expression->numberOfOperands();
ExpressionLayout * argumentLayouts = nullptr;
if (numberOfOperands > 0) {
ExpressionLayout ** grandChildrenLayouts = new ExpressionLayout *[2*numberOfOperands-1];
int layoutIndex = 0;
grandChildrenLayouts[layoutIndex++] = expression->operand(0)->createLayout(floatDisplayMode, complexFormat);
for (int i = 1; i < numberOfOperands; i++) {
grandChildrenLayouts[layoutIndex++] = new StringLayout(",", 1);
grandChildrenLayouts[layoutIndex++] = expression->operand(i)->createLayout(floatDisplayMode, complexFormat);
}
/* HorizontalLayout holds the grand children layouts so they do not need to
* be deleted */
argumentLayouts = new HorizontalLayout(grandChildrenLayouts, 2*numberOfOperands-1);
delete [] grandChildrenLayouts;
}
ExpressionLayout * childrenLayouts[2];
childrenLayouts[0] = new StringLayout(operatorName, strlen(operatorName));
childrenLayouts[1] = new ParenthesisLayout(argumentLayouts);
/* Same comment as above */
return new HorizontalLayout(childrenLayouts, 2);
}
int LayoutEngine::writeInfixExpressionTextInBuffer(const Expression * expression, char * buffer, int bufferSize, int numberOfDigits, const char * operatorName) {
if (bufferSize == 0) {
return -1;
}
buffer[bufferSize-1] = 0;
int numberOfChar = 0;
int numberOfOperands = expression->numberOfOperands();
assert(numberOfOperands > 1);
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
if (expression->operand(0)->needParenthesisWithParent(expression)) {
buffer[numberOfChar++] = '(';
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
}
numberOfChar += expression->operand(0)->writeTextInBuffer(buffer+numberOfChar, bufferSize-numberOfChar, numberOfDigits);
if (expression->operand(0)->needParenthesisWithParent(expression)) {
buffer[numberOfChar++] = ')';
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
}
for (int i=1; i<numberOfOperands; i++) {
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
numberOfChar += strlcpy(buffer+numberOfChar, operatorName, bufferSize-numberOfChar);
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
if (expression->operand(i)->needParenthesisWithParent(expression)) {
buffer[numberOfChar++] = '(';
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
}
numberOfChar += expression->operand(i)->writeTextInBuffer(buffer+numberOfChar, bufferSize-numberOfChar, numberOfDigits);
if (expression->operand(i)->needParenthesisWithParent(expression)) {
buffer[numberOfChar++] = ')';
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
}
}
buffer[numberOfChar] = 0;
return numberOfChar;
}
int LayoutEngine::writePrefixExpressionTextInBuffer(const Expression * expression, char * buffer, int bufferSize, int numberOfDigits, const char * operatorName) {
if (bufferSize == 0) {
return -1;
}
buffer[bufferSize-1] = 0;
int numberOfChar = 0;
numberOfChar += strlcpy(buffer, operatorName, bufferSize);
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
buffer[numberOfChar++] = '(';
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
int numberOfOperands = expression->numberOfOperands();
if (numberOfOperands > 0) {
numberOfChar += expression->operand(0)->writeTextInBuffer(buffer+numberOfChar, bufferSize-numberOfChar, numberOfDigits);
for (int i = 1; i < numberOfOperands; i++) {
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
buffer[numberOfChar++] = ',';
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
numberOfChar += expression->operand(i)->writeTextInBuffer(buffer+numberOfChar, bufferSize-numberOfChar, numberOfDigits);
}
if (numberOfChar >= bufferSize-1) { return bufferSize-1; }
}
buffer[numberOfChar++] = ')';
buffer[numberOfChar] = 0;
return numberOfChar;
}
}