expression_field_delegate_app.cpp
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#include "expression_field_delegate_app.h"
#include <escher.h>
#include "../i18n.h"
#include "../apps_container.h"
using namespace Poincare;
namespace Shared {
ExpressionFieldDelegateApp::ExpressionFieldDelegateApp(Container * container, Snapshot * snapshot, ViewController * rootViewController) :
TextFieldDelegateApp(container, snapshot, rootViewController),
ExpressionLayoutFieldDelegate()
{
}
char ExpressionFieldDelegateApp::privateXNT(ExpressionLayoutField * expressionLayoutField) {
char xntCharFromLayout = expressionLayoutField->XNTChar();
if (xntCharFromLayout != Ion::Charset::Empty) {
return xntCharFromLayout;
}
return XNT()[0];
}
bool ExpressionFieldDelegateApp::expressionLayoutFieldShouldFinishEditing(ExpressionLayoutField * expressionLayoutField, Ion::Events::Event event) {
return event == Ion::Events::OK || event == Ion::Events::EXE;
}
bool ExpressionFieldDelegateApp::expressionLayoutFieldDidReceiveEvent(ExpressionLayoutField * expressionLayoutField, Ion::Events::Event event) {
if (expressionLayoutField->isEditing() && expressionLayoutField->expressionLayoutFieldShouldFinishEditing(event)) {
if (!expressionLayoutField->hasText()) {
expressionLayoutField->app()->displayWarning(I18n::Message::SyntaxError);
return true;
}
char buffer[TextField::maxBufferSize()];
int bufferSize = TextField::maxBufferSize();
int length = expressionLayoutField->writeTextInBuffer(buffer, bufferSize);
Expression * exp = Expression::parse(buffer);
if (exp != nullptr) {
delete exp;
}
if (length >= bufferSize-1) {
/* If the buffer is totally full, it is VERY likely that writeTextInBuffer
* escaped before printing utterly the expression. */
displayWarning(I18n::Message::SyntaxError);
return true;
}
if (exp == nullptr) {
expressionLayoutField->app()->displayWarning(I18n::Message::SyntaxError);
return true;
}
}
if (event == Ion::Events::Var) {
if (!expressionLayoutField->isEditing()) {
expressionLayoutField->setEditing(true);
}
AppsContainer * appsContainer = (AppsContainer *)expressionLayoutField->app()->container();
VariableBoxController * variableBoxController = appsContainer->variableBoxController();
variableBoxController->setSender(expressionLayoutField);
expressionLayoutField->app()->displayModalViewController(variableBoxController, 0.f, 0.f, Metric::PopUpTopMargin, Metric::PopUpLeftMargin, 0, Metric::PopUpRightMargin);
return true;
}
if (event == Ion::Events::XNT) {
if (!expressionLayoutField->isEditing()) {
expressionLayoutField->setEditing(true);
}
const char xnt[2] = {privateXNT(expressionLayoutField), 0};
return expressionLayoutField->handleEventWithText(xnt);
}
return false;
}
Toolbox * ExpressionFieldDelegateApp::toolboxForExpressionLayoutField(ExpressionLayoutField * expressionLayoutField) {
Toolbox * toolbox = container()->mathToolbox();
toolbox->setSender(expressionLayoutField);
return toolbox;
}
}