/cocos2d/cocos/2d/CCTextFieldTTF.cpp

/****************************************************************************
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2013-2014 Chukong Technologies Inc.

http://www.cocos2d-x.org

Permission is hereby granted, free of charge, to any person obtaining a copy
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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****************************************************************************/

#include "2d/CCTextFieldTTF.h"

#include "base/CCDirector.h"
#include "platform/CCFileUtils.h"
#include "base/ccUTF8.h"
#include "2d/CCSprite.h"

NS_CC_BEGIN

#define CURSOR_TIME_SHOW_HIDE 0.5f
#define CURSOR_DEFAULT_CHAR '|'

static int _calcCharCount(const char * text)
{
    int n = 0;
    char ch = 0;
    while ((ch = *text))
    {
        CC_BREAK_IF(! ch);

        if (0x80 != (0xC0 & ch))
        {
            ++n;
        }
        ++text;
    }
    return n;
}

//////////////////////////////////////////////////////////////////////////
// constructor and destructor
//////////////////////////////////////////////////////////////////////////

TextFieldTTF::TextFieldTTF()
: _delegate(0)
, _charCount(0)
, _inputText("")
, _placeHolder("")   // prevent Label initWithString assertion
, _colorText(Color4B::WHITE)
, _secureTextEntry(false)
,_passwordStyleText("\u25CF")
, _cursorEnabled(false)
, _cursorPosition(0)
, _cursorChar(CURSOR_DEFAULT_CHAR)
, _cursorShowingTime(0.0f)
, _isAttachWithIME(false)
{
    _colorSpaceHolder.r = _colorSpaceHolder.g = _colorSpaceHolder.b = 127;
    _colorSpaceHolder.a = 255;
}

TextFieldTTF::~TextFieldTTF()
{
}

//////////////////////////////////////////////////////////////////////////
// static constructor
//////////////////////////////////////////////////////////////////////////

TextFieldTTF * TextFieldTTF::textFieldWithPlaceHolder(const std::string& placeholder, const Size& dimensions, TextHAlignment alignment, const std::string& fontName, float fontSize)
{
    TextFieldTTF *ret = new (std::nothrow) TextFieldTTF();
    if(ret && ret->initWithPlaceHolder("", dimensions, alignment, fontName, fontSize))
    {
        ret->autorelease();
        if (placeholder.size()>0)
        {
            ret->setPlaceHolder(placeholder);
        }
        return ret;
    }
    CC_SAFE_DELETE(ret);
    return nullptr;
}

TextFieldTTF * TextFieldTTF::textFieldWithPlaceHolder(const std::string& placeholder, const std::string& fontName, float fontSize)
{
    TextFieldTTF *ret = new (std::nothrow) TextFieldTTF();
    if(ret && ret->initWithPlaceHolder("", fontName, fontSize))
    {
        ret->autorelease();
        if (placeholder.size()>0)
        {
            ret->setPlaceHolder(placeholder);
        }
        return ret;
    }
    CC_SAFE_DELETE(ret);
    return nullptr;
}

//////////////////////////////////////////////////////////////////////////
// initialize
//////////////////////////////////////////////////////////////////////////

bool TextFieldTTF::initWithPlaceHolder(const std::string& placeholder, const Size& dimensions, TextHAlignment alignment, const std::string& fontName, float fontSize)
{
    setDimensions(dimensions.width, dimensions.height);
    setAlignment(alignment, TextVAlignment::CENTER);

    return initWithPlaceHolder(placeholder, fontName, fontSize);
}
bool TextFieldTTF::initWithPlaceHolder(const std::string& placeholder, const std::string& fontName, float fontSize)
{
    _placeHolder = placeholder;

    do 
    {
        // If fontName is ttf file and it corrected, use TTFConfig
        if (FileUtils::getInstance()->isFileExist(fontName))
        {
            TTFConfig ttfConfig(fontName.c_str(), fontSize, GlyphCollection::DYNAMIC);
            if (setTTFConfig(ttfConfig))
            {
                break;
            }
        }

        setSystemFontName(fontName);
        setSystemFontSize(fontSize);

    } while (false);


    Label::setTextColor(_colorSpaceHolder);
    Label::setString(_placeHolder);

#if (CC_TARGET_PLATFORM == CC_PLATFORM_MAC || CC_TARGET_PLATFORM == CC_PLATFORM_WIN32 || CC_TARGET_PLATFORM == CC_PLATFORM_LINUX)
    // On desktop default enable cursor
    if (_currentLabelType == LabelType::TTF)
    {
        setCursorEnabled(true);
    }
#endif

    return true;
}

//////////////////////////////////////////////////////////////////////////
// IMEDelegate
//////////////////////////////////////////////////////////////////////////

bool TextFieldTTF::attachWithIME()
{
    bool ret = IMEDelegate::attachWithIME();
    if (ret)
    {
        // open keyboard
        auto pGlView = Director::getInstance()->getOpenGLView();
        if (pGlView)
        {
            pGlView->setIMEKeyboardState(true);
        }
    }
    return ret;
}

bool TextFieldTTF::detachWithIME()
{
    bool ret = IMEDelegate::detachWithIME();
    if (ret)
    {
        // close keyboard
        auto glView = Director::getInstance()->getOpenGLView();
        if (glView)
        {
            glView->setIMEKeyboardState(false);
        }
    }
    return ret;
}

void TextFieldTTF::didAttachWithIME()
{
    setAttachWithIME(true);
}

void TextFieldTTF::didDetachWithIME()
{
    setAttachWithIME(false);
}

bool TextFieldTTF::canAttachWithIME()
{
    return (_delegate) ? (! _delegate->onTextFieldAttachWithIME(this)) : true;
}

bool TextFieldTTF::canDetachWithIME()
{
    return (_delegate) ? (! _delegate->onTextFieldDetachWithIME(this)) : true;
}

void TextFieldTTF::insertText(const char * text, size_t len)
{
    std::string insert(text, len);

    // insert \n means input end
    int pos = static_cast<int>(insert.find((char)TextFormatter::NewLine));
    if ((int)insert.npos != pos)
    {
        len = pos;
        insert.erase(pos);
    }

    if (len > 0)
    {
        if (_delegate && _delegate->onTextFieldInsertText(this, insert.c_str(), len))
        {
            // delegate doesn't want to insert text
            return;
        }

        int countInsertChar = _calcCharCount(insert.c_str());
        _charCount += countInsertChar;

        if (_cursorEnabled)
        {
            StringUtils::StringUTF8 stringUTF8;

            stringUTF8.replace(_inputText);
            stringUTF8.insert(_cursorPosition, insert);

            setCursorPosition(_cursorPosition + countInsertChar);            

            setString(stringUTF8.getAsCharSequence());
        }
        else
        {
            std::string sText(_inputText);
            sText.append(insert);
            setString(sText);
        }
    }

    if ((int)insert.npos == pos) {
        return;
    }

    // '\n' inserted, let delegate process first
    if (_delegate && _delegate->onTextFieldInsertText(this, "\n", 1))
    {
        return;
    }

    // if delegate hasn't processed, detach from IME by default
    detachWithIME();
}

void TextFieldTTF::deleteBackward()
{
    size_t len = _inputText.length();
    if (! len)
    {
        // there is no string
        return;
    }

    // get the delete byte number
    size_t deleteLen = 1;    // default, erase 1 byte

    while(0x80 == (0xC0 & _inputText.at(len - deleteLen)))
    {
        ++deleteLen;
    }

    if (_delegate && _delegate->onTextFieldDeleteBackward(this, _inputText.c_str() + len - deleteLen, static_cast<int>(deleteLen)))
    {
        // delegate doesn't want to delete backwards
        return;
    }

    // if all text deleted, show placeholder string
    if (len <= deleteLen)
    {
        _inputText = "";
        _charCount = 0;
        setCursorPosition(0);
        setString(_inputText);
        return;
    }

    // set new input text
    if (_cursorEnabled)
    {
        if (_cursorPosition)
        {
            setCursorPosition(_cursorPosition - 1);

            StringUtils::StringUTF8 stringUTF8;

            stringUTF8.replace(_inputText);
            stringUTF8.deleteChar(_cursorPosition);

            _charCount = stringUTF8.length();
            setString(stringUTF8.getAsCharSequence());
        }
    }
    else
    {
        std::string text(_inputText.c_str(), len - deleteLen);
        setString(text);
    }
}

const std::string& TextFieldTTF::getContentText()
{
    return _inputText;
}

void TextFieldTTF::setCursorPosition(std::size_t cursorPosition)
{
    if (_cursorEnabled && cursorPosition <= (std::size_t)_charCount)
    {
        _cursorPosition = cursorPosition;
        _cursorShowingTime = CURSOR_TIME_SHOW_HIDE*2.0;
    }
}

void TextFieldTTF::setCursorFromPoint(const Vec2 &point, const Camera* camera)
{
    if (_cursorEnabled)
    {
        // Reset Label, no cursor
        bool oldIsAttachWithIME = _isAttachWithIME;
        _isAttachWithIME = false;
        updateCursorDisplayText();

        Rect rect;
        rect.size = getContentSize();
        if (isScreenPointInRect(point, camera, getWorldToNodeTransform(), rect, nullptr))
        {
            int latterPosition = 0;
            for (; latterPosition < _lengthOfString; ++latterPosition)
            {
                if (_lettersInfo[latterPosition].valid)
                {
                    auto sprite = getLetter(latterPosition);
                    rect.size = sprite->getContentSize();
                    if (isScreenPointInRect(point, camera, sprite->getWorldToNodeTransform(), rect, nullptr))
                    {
                        setCursorPosition(latterPosition);
                        break;
                    }
                }
            }
            if (latterPosition == _lengthOfString)
            {
                setCursorPosition(latterPosition);
            }
        }

        // Set cursor
        _isAttachWithIME = oldIsAttachWithIME;
        updateCursorDisplayText();
    }
}

void TextFieldTTF::setAttachWithIME(bool isAttachWithIME)
{
    if (isAttachWithIME != _isAttachWithIME)
    {
        _isAttachWithIME = isAttachWithIME;

        if (_isAttachWithIME)
        {
            setCursorPosition(_charCount);
        }
        updateCursorDisplayText();
    }
}

void TextFieldTTF::setTextColor(const Color4B &color)
{
    _colorText = color;
    if (!_inputText.empty()) 
    {
        Label::setTextColor(_colorText);
    }
}

void TextFieldTTF::visit(Renderer *renderer, const Mat4 &parentTransform, uint32_t parentFlags)
{
    if (_delegate && _delegate->onVisit(this,renderer,parentTransform,parentFlags))
    {
        return;
    }
    Label::visit(renderer,parentTransform,parentFlags);
}

void TextFieldTTF::update(float delta)
{
    if (_cursorEnabled && _isAttachWithIME)
    {
        _cursorShowingTime -= delta;
        if (_cursorShowingTime < -CURSOR_TIME_SHOW_HIDE)
        {
            _cursorShowingTime = CURSOR_TIME_SHOW_HIDE;
        }
        // before cursor inserted '\b', need next letter
        auto sprite = getLetter((int)_cursorPosition + 1);

        if (sprite)
        {
            if (_cursorShowingTime >= 0.0f)
            {
                sprite->setOpacity(255);
            }
            else
            {
                sprite->setOpacity(0);
            }
            sprite->setDirty(true);
        }
    }
}

const Color4B& TextFieldTTF::getColorSpaceHolder()
{
    return _colorSpaceHolder;
}

void TextFieldTTF::setColorSpaceHolder(const Color3B& color)
{
    _colorSpaceHolder.r = color.r;
    _colorSpaceHolder.g = color.g;
    _colorSpaceHolder.b = color.b;
    _colorSpaceHolder.a = 255;
    if (_inputText.empty())
    {
        Label::setTextColor(_colorSpaceHolder);
    }
}

void TextFieldTTF::setColorSpaceHolder(const Color4B& color)
{
    _colorSpaceHolder = color;
    if (_inputText.empty())
    {
        Label::setTextColor(_colorSpaceHolder);
    }
}

//////////////////////////////////////////////////////////////////////////
// properties
//////////////////////////////////////////////////////////////////////////

// input text property
void TextFieldTTF::setString(const std::string &text)
{
    std::string displayText;

    int charCount = 0;
    if (!text.empty())
    {
        _inputText = text;
        displayText = _inputText;
        charCount = _calcCharCount(_inputText.c_str());
        if (_secureTextEntry)
        {
            displayText = "";
            size_t length = charCount;
            while (length)
            {
                displayText.append(_passwordStyleText);
                --length;
            }
        }
    }
    else
    {
        _inputText = "";
    }

    if (_cursorEnabled && charCount != _charCount)
    {
        _cursorPosition = charCount;
    }

    if (_cursorEnabled)
    {
        // Need for recreate all letters in Label
        Label::removeAllChildrenWithCleanup(false);
    }

    // if there is no input text, display placeholder instead
    if (_inputText.empty() && (!_cursorEnabled || !_isAttachWithIME))
    {
        Label::setTextColor(_colorSpaceHolder);
        Label::setString(_placeHolder);
    }
    else
    {
        makeStringSupportCursor(displayText);

        Label::setTextColor(_colorText);
        Label::setString(displayText);
    }
    _charCount = charCount;
}



void TextFieldTTF::appendString(const std::string& text)
{
    insertText(text.c_str(), text.length());
}

void TextFieldTTF::makeStringSupportCursor(std::string& displayText)
{
    if (_cursorEnabled && _isAttachWithIME)
    {
        if (displayText.empty())
        {
            // \b - Next char not change x position
            displayText.push_back((char)TextFormatter::NextCharNoChangeX);
            displayText.push_back(_cursorChar);
        }
        else
        {
            StringUtils::StringUTF8 stringUTF8;

            stringUTF8.replace(displayText);

            if (_cursorPosition > stringUTF8.length())
            {
                _cursorPosition = stringUTF8.length();
            }
            std::string cursorChar;
            // \b - Next char not change x position
            cursorChar.push_back((char)TextFormatter::NextCharNoChangeX);
            cursorChar.push_back(_cursorChar);
            stringUTF8.insert(_cursorPosition, cursorChar);

            displayText = stringUTF8.getAsCharSequence();
        }
    }
}

void TextFieldTTF::updateCursorDisplayText()
{
    // Update Label content
    setString(_inputText);
}

void TextFieldTTF::setCursorChar(char cursor)
{
    if (_cursorChar != cursor)
    {
        _cursorChar = cursor;
        updateCursorDisplayText();
    }
}

void TextFieldTTF::controlKey(EventKeyboard::KeyCode keyCode)
{
    if (_cursorEnabled)
    {
        switch (keyCode)
        {
        case EventKeyboard::KeyCode::KEY_HOME:
        case EventKeyboard::KeyCode::KEY_KP_HOME:
            setCursorPosition(0);
            updateCursorDisplayText();
            break;
        case EventKeyboard::KeyCode::KEY_END:
            setCursorPosition(_charCount);
            updateCursorDisplayText();
            break;
        case EventKeyboard::KeyCode::KEY_DELETE:
        case EventKeyboard::KeyCode::KEY_KP_DELETE:
            if (_cursorPosition < (std::size_t)_charCount)
            {
                StringUtils::StringUTF8 stringUTF8;

                stringUTF8.replace(_inputText);
                stringUTF8.deleteChar(_cursorPosition);
                setCursorPosition(_cursorPosition);
                _charCount = stringUTF8.length();
                setString(stringUTF8.getAsCharSequence());
            }
            break;
        case EventKeyboard::KeyCode::KEY_LEFT_ARROW:
            if (_cursorPosition)
            {
                setCursorPosition(_cursorPosition - 1);
                updateCursorDisplayText();
            }
            break;
        case EventKeyboard::KeyCode::KEY_RIGHT_ARROW:
            if (_cursorPosition < (std::size_t)_charCount)
            {
                setCursorPosition(_cursorPosition + 1);
                updateCursorDisplayText();
            }
            break;
        case EventKeyboard::KeyCode::KEY_ESCAPE:
            detachWithIME();
            break;
        default:
            break;
        }
    }
}

const std::string& TextFieldTTF::getString() const
{
    return _inputText;
}

// place holder text property
void TextFieldTTF::setPlaceHolder(const std::string& text)
{
    _placeHolder = text;
    if (_inputText.empty())
    {
        Label::setTextColor(_colorSpaceHolder);
        Label::setString(_placeHolder);
    }
}

const std::string& TextFieldTTF::getPlaceHolder() const
{
    return _placeHolder;
}

void TextFieldTTF::setCursorEnabled(bool enabled)
{
    if (_currentLabelType == LabelType::TTF)
    {
        if (_cursorEnabled != enabled)
        {
            _cursorEnabled = enabled;
            if (_cursorEnabled)
            {
                _cursorPosition = _charCount;

                scheduleUpdate();
            }
            else
            {
                _cursorPosition = 0;

                unscheduleUpdate();
            }
        }
    }
    else
    {
        CCLOG("TextFieldTTF cursor worked only LabelType::TTF");
    }
}

// secureTextEntry
void TextFieldTTF::setSecureTextEntry(bool value)
{
    if (_secureTextEntry != value)
    {
        _secureTextEntry = value;
        setString(_inputText);
    }
}

void TextFieldTTF::setPasswordTextStyle(const std::string &text)
{
    if (text.length() < 1)
    {
        return;
    }

    if (text != _passwordStyleText) {
        _passwordStyleText = text;
        setString(_inputText);
    }
}

std::string TextFieldTTF::getPasswordTextStyle()const
{
    return _passwordStyleText;
}

bool TextFieldTTF::isSecureTextEntry() const
{
    return _secureTextEntry;
}

NS_CC_END