6663b6c9
 adorian
projet complet av...
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#include "text_field_delegate_app.h"
#include "../apps_container.h"
#include <cmath>
#include <string.h>
using namespace Poincare;
namespace Shared {
TextFieldDelegateApp::TextFieldDelegateApp(Container * container, Snapshot * snapshot, ViewController * rootViewController) :
::App(container, snapshot, rootViewController, I18n::Message::Warning),
TextFieldDelegate()
{
}
Context * TextFieldDelegateApp::localContext() {
return container()->globalContext();
}
AppsContainer * TextFieldDelegateApp::container() {
return (AppsContainer *)app()->container();
}
const char * TextFieldDelegateApp::XNT() {
return "X";
}
const char * TextFieldDelegateApp::privateXNT(TextField * textField) {
static constexpr struct { const char *name, *xnt; } sFunctions[] = {
{ "diff", "x" }, { "int", "x" },
{ "product", "n" }, { "sum", "n" }
};
// Let's assume everything before the cursor is nested correctly, which is reasonable if the expression is being entered left-to-right.
const char * text = textField->text();
size_t location = textField->cursorLocation();
unsigned level = 0;
while (location >= 1) {
location--;
switch (text[location]) {
case '(':
// Check if we are skipping to the next matching '('.
if (level) {
level--;
break;
}
// Skip over whitespace.
while (location >= 1 && text[location-1] == ' ') {
location--;
}
// We found the next innermost function we are currently in.
for (size_t i = 0; i < sizeof(sFunctions)/sizeof(sFunctions[0]); i++) {
const char * name = sFunctions[i].name;
size_t length = strlen(name);
if (location >= length && memcmp(&text[location-length], name, length) == 0) {
return sFunctions[i].xnt;
}
}
break;
case ',':
// Commas encountered while skipping to the next matching '(' should be ignored.
if (level) {
break;
}
// FALLTHROUGH
case ')':
// Skip to the next matching '('.
level++;
break;
}
}
// Fallback to the default
return XNT();
}
bool TextFieldDelegateApp::textFieldShouldFinishEditing(TextField * textField, Ion::Events::Event event) {
return event == Ion::Events::OK || event == Ion::Events::EXE;
}
bool TextFieldDelegateApp::textFieldDidReceiveEvent(TextField * textField, Ion::Events::Event event) {
if (textField->isEditing() && textField->textFieldShouldFinishEditing(event)) {
Expression * exp = Expression::parse(textField->text());
if (exp != nullptr) {
delete exp;
}
if (exp == nullptr) {
textField->app()->displayWarning(I18n::Message::SyntaxError);
return true;
}
}
if (event == Ion::Events::Var) {
if (!textField->isEditing()) {
textField->setEditing(true);
}
AppsContainer * appsContainer = (AppsContainer *)textField->app()->container();
VariableBoxController * variableBoxController = appsContainer->variableBoxController();
variableBoxController->setTextFieldCaller(textField);
textField->app()->displayModalViewController(variableBoxController, 0.f, 0.f, Metric::PopUpTopMargin, Metric::PopUpLeftMargin, 0, Metric::PopUpRightMargin);
return true;
}
if (event == Ion::Events::XNT) {
if (!textField->isEditing()) {
textField->setEditing(true);
}
const char * xnt = privateXNT(textField);
textField->insertTextAtLocation(xnt, textField->cursorLocation());
textField->setCursorLocation(textField->cursorLocation()+strlen(xnt));
return true;
}
return false;
}
Toolbox * TextFieldDelegateApp::toolboxForTextField(TextField * textField) {
return container()->mathToolbox();
}
}
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