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94 lines
2.6 KiB
94 lines
2.6 KiB
/*
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* Copyright (C) 2013 - 2015 Hong Jen Yee (PCMan) <pcman.tw@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include "browsehistory.h"
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namespace Fm {
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BrowseHistory::BrowseHistory():
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currentIndex_(0),
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maxCount_(10) {
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}
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BrowseHistory::~BrowseHistory() {
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}
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void BrowseHistory::add(Fm::FilePath path, int scrollPos) {
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int lastIndex = items_.size() - 1;
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if(currentIndex_ < lastIndex) {
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// if we're not at the last item, remove items after the current one.
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items_.erase(items_.cbegin() + currentIndex_ + 1, items_.cend());
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}
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if(items_.size() + 1 > static_cast<size_t>(maxCount_)) {
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// if there are too many items, remove the oldest one.
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// FIXME: what if currentIndex_ == 0? remove the last item instead?
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if(currentIndex_ == 0) {
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items_.erase(items_.cbegin() + lastIndex);
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}
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else {
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items_.erase(items_.cbegin());
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--currentIndex_;
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}
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}
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// add a path and current scroll position to browse history
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items_.push_back(BrowseHistoryItem(path, scrollPos));
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currentIndex_ = items_.size() - 1;
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}
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void BrowseHistory::setCurrentIndex(int index) {
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if(index >= 0 && static_cast<size_t>(index) < items_.size()) {
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currentIndex_ = index;
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// FIXME: should we emit a signal for the change?
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}
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}
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bool BrowseHistory::canBackward() const {
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return (currentIndex_ > 0);
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}
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int BrowseHistory::backward() {
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if(canBackward()) {
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--currentIndex_;
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}
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return currentIndex_;
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}
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bool BrowseHistory::canForward() const {
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return (static_cast<size_t>(currentIndex_) + 1 < items_.size());
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}
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int BrowseHistory::forward() {
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if(canForward()) {
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++currentIndex_;
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}
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return currentIndex_;
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}
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void BrowseHistory::setMaxCount(int maxCount) {
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maxCount_ = maxCount;
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if(items_.size() > static_cast<size_t>(maxCount)) {
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// TODO: remove some items
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}
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}
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} // namespace Fm
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