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//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
//
// copyright : (C) 2008 by Eran Ifrah
// file name : navigationmanager.cpp
//
// -------------------------------------------------------------------------
// A
// _____ _ _ _ _
// / __ \ | | | | (_) |
// | / \/ ___ __| | ___| | _| |_ ___
// | | / _ \ / _ |/ _ \ | | | __/ _ )
// | \__/\ (_) | (_| | __/ |___| | || __/
// \____/\___/ \__,_|\___\_____/_|\__\___|
//
// F i l e
//
// 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.
//
//////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////
#include "navigationmanager.h"
NavMgr::NavMgr()
: m_cur(0)
{
}
NavMgr::~NavMgr()
{
Clear();
}
NavMgr *NavMgr::Get()
{
static NavMgr theManager;
return &theManager;
}
void NavMgr::Clear()
{
m_cur = 0;
m_jumps.clear();
}
bool NavMgr::ValidLocation(const BrowseRecord& rec) const
{
// ATTN: lineno == 1 implies a file was just opened, but before the find-and-select has happened
// TODO: don't allow records for non-source files (*.diff, *.i, etc)
return !rec.filename.IsEmpty() && rec.lineno > 1;
}
bool NavMgr::CanNext() const
{
return m_cur+1 < m_jumps.size();
}
bool NavMgr::CanPrev() const
{
return m_cur > 0;
}
BrowseRecord NavMgr::GetNext()
{
return CanNext() ? m_jumps[++m_cur] : BrowseRecord();
}
BrowseRecord NavMgr::GetPrev()
{
return CanPrev() ? m_jumps[--m_cur] : BrowseRecord();
}
void NavMgr::AddJump(const BrowseRecord &from, const BrowseRecord &to)
{
if (ValidLocation(from)) {
// keep previous location only if it's not at position 0, and it is not equal to from
if (m_cur > 0 && !(m_jumps[m_cur].filename == from.filename && m_jumps[m_cur].lineno == from.lineno)) {
m_cur++;
}
m_jumps.resize(m_cur);
m_jumps.push_back(from);
}
if (ValidLocation(to)) {
// only add if there's an actual jump
if (!m_jumps.empty() && !(m_jumps[m_cur].filename == to.filename && m_jumps[m_cur].lineno == to.lineno)) {
m_cur++;
m_jumps.resize(m_cur);
m_jumps.push_back(to);
}
}
}
bool NavMgr::NavigateBackward(IManager *mgr)
{
return CanPrev() && mgr->OpenFile(GetPrev());
}
bool NavMgr::NavigateForward(IManager *mgr)
{
return CanNext() && mgr->OpenFile(GetNext());
}
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