var_text.cpp
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:7k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * var_text.cpp
- *****************************************************************************
- * Copyright (C) 2003 the VideoLAN team
- * $Id: e692433d5e3d5ee1c6edab725520e00c666538ca $
- *
- * Authors: Cyril Deguet <asmax@via.ecp.fr>
- * Olivier Teulière <ipkiss@via.ecp.fr>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
- #include "var_text.hpp"
- #include "../src/vlcproc.hpp"
- #include "../src/var_manager.hpp"
- #include "../vars/time.hpp"
- #include "../vars/volume.hpp"
- const string VarText::m_type = "text";
- VarText::VarText( intf_thread_t *pIntf, bool substVars ): Variable( pIntf ),
- m_text( pIntf, "" ), m_lastText( pIntf, "" ), m_substVars( substVars )
- {
- }
- VarText::~VarText()
- {
- if( m_substVars )
- {
- // Remove the observers
- delObservers();
- }
- }
- const UString VarText::get() const
- {
- if( !m_substVars )
- {
- // Do not substitute "$X" variables
- return m_text;
- }
- uint32_t pos;
- VlcProc *pVlcProc = VlcProc::instance( getIntf() );
- // Fill a temporary UString object, and replace the escape characters
- // ($H for help, $T for current time, $L for time left, $D for duration,
- // $V for volume)
- UString temp( m_text );
- // $H is processed first, in case the help string contains other variables
- // to replace. And it is replaced only once, in case one of these other
- // variables is $H...
- if( (pos = temp.find( "$H" )) != UString::npos )
- {
- VarManager *pVarManager = VarManager::instance( getIntf() );
- temp.replace( pos, 2, pVarManager->getHelpText().get() );
- }
- while( (pos = temp.find( "$T" )) != UString::npos )
- {
- temp.replace( pos, 2,
- pVlcProc->getTimeVar().getAsStringCurrTime().c_str() );
- }
- while( (pos = temp.find( "$t" )) != UString::npos )
- {
- temp.replace( pos, 2,
- pVlcProc->getTimeVar().getAsStringCurrTime(true).c_str() );
- }
- while( (pos = temp.find( "$L" )) != UString::npos )
- {
- temp.replace( pos, 2,
- pVlcProc->getTimeVar().getAsStringTimeLeft().c_str() );
- }
- while( (pos = temp.find( "$l" )) != UString::npos )
- {
- temp.replace( pos, 2,
- pVlcProc->getTimeVar().getAsStringTimeLeft(true).c_str() );
- }
- while( (pos = temp.find( "$D" )) != UString::npos )
- {
- temp.replace( pos, 2,
- pVlcProc->getTimeVar().getAsStringDuration().c_str() );
- }
- while( (pos = temp.find( "$d" )) != UString::npos )
- {
- temp.replace( pos, 2,
- pVlcProc->getTimeVar().getAsStringDuration(true).c_str() );
- }
- while( (pos = temp.find( "$V" )) != UString::npos )
- {
- temp.replace( pos, 2,
- pVlcProc->getVolumeVar().getAsStringPercent().c_str() );
- }
- while( (pos = temp.find( "$N" )) != UString::npos )
- {
- temp.replace( pos, 2, pVlcProc->getStreamNameVar().get() );
- }
- while( (pos = temp.find( "$F" )) != UString::npos )
- {
- temp.replace( pos, 2, pVlcProc->getStreamURIVar().get() );
- }
- while( (pos = temp.find( "$B" )) != UString::npos )
- {
- temp.replace( pos, 2, pVlcProc->getStreamBitRateVar().get() );
- }
- while( (pos = temp.find( "$S" )) != UString::npos )
- {
- temp.replace( pos, 2, pVlcProc->getStreamSampleRateVar().get() );
- }
- return temp;
- }
- void VarText::set( const UString &rText )
- {
- // Avoid an infinite loop
- if( rText == m_text )
- {
- return;
- }
- m_text = rText;
- if( m_substVars )
- {
- // Stop observing other variables
- delObservers();
- VlcProc *pVlcProc = VlcProc::instance( getIntf() );
- VarManager *pVarManager = VarManager::instance( getIntf() );
- // Observe needed variables
- if( m_text.find( "$H" ) != UString::npos )
- {
- pVarManager->getHelpText().addObserver( this );
- }
- if( m_text.find( "$T" ) != UString::npos ||
- m_text.find( "$t" ) != UString::npos )
- {
- pVlcProc->getTimeVar().addObserver( this );
- }
- if( m_text.find( "$L" ) != UString::npos ||
- m_text.find( "$l" ) != UString::npos )
- {
- pVlcProc->getTimeVar().addObserver( this );
- }
- if( m_text.find( "$D" ) != UString::npos ||
- m_text.find( "$d" ) != UString::npos )
- {
- pVlcProc->getTimeVar().addObserver( this );
- }
- if( m_text.find( "$V" ) != UString::npos )
- {
- pVlcProc->getVolumeVar().addObserver( this );
- }
- if( m_text.find( "$N" ) != UString::npos )
- {
- pVlcProc->getStreamNameVar().addObserver( this );
- }
- if( m_text.find( "$F" ) != UString::npos )
- {
- pVlcProc->getStreamURIVar().addObserver( this );
- }
- if( m_text.find( "$B" ) != UString::npos )
- {
- pVlcProc->getStreamBitRateVar().addObserver( this );
- }
- if( m_text.find( "$S" ) != UString::npos )
- {
- pVlcProc->getStreamSampleRateVar().addObserver( this );
- }
- }
- notify();
- }
- void VarText::onUpdate( Subject<VarPercent> &rVariable, void *arg )
- {
- UString newText = get();
- // If the text has changed, notify the observers
- if( newText != m_lastText )
- {
- m_lastText = newText;
- notify();
- }
- }
- void VarText::onUpdate( Subject<VarText> &rVariable, void *arg )
- {
- UString newText = get();
- // If the text has changed, notify the observers
- if( newText != m_lastText )
- {
- m_lastText = newText;
- notify();
- }
- }
- void VarText::delObservers()
- {
- // Stop observing other variables
- VlcProc *pVlcProc = VlcProc::instance( getIntf() );
- pVlcProc->getTimeVar().delObserver( this );
- pVlcProc->getVolumeVar().delObserver( this );
- pVlcProc->getStreamNameVar().delObserver( this );
- pVlcProc->getStreamURIVar().delObserver( this );
- pVlcProc->getStreamBitRateVar().delObserver( this );
- pVlcProc->getStreamSampleRateVar().delObserver( this );
- VarManager *pVarManager = VarManager::instance( getIntf() );
- pVarManager->getHelpText().delObserver( this );
- }