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LyricWidget.cpp
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#include "LyricWidget.h"
#include <algorithm>
#include <QTextCodec>
LyricWidget::LyricWidget(QWidget *parent) :
QWidget(parent)
{
if (this->objectName().isEmpty())
this->setObjectName(QString::fromUtf8("LyricWidget"));
this->resize(831, 411);
this->setStyleSheet(QString::fromUtf8(""));
label_3i = new QLabel(this);
label_3i->setObjectName(QString::fromUtf8("label_3i"));
label_3i->setGeometry(QRect(0, 30, 831, 31));
QFont font;
font.setFamily(QString::fromUtf8("Microsoft JhengHei UI"));
font.setPointSize(10);
font.setBold(true);
font.setWeight(75);
label_3i->setFont(font);
label_3i->setStyleSheet(QString::fromUtf8("color: rgba(255, 255, 255, 170);"));
label_3i->setAlignment(Qt::AlignCenter);
label_3i->setText(QString::fromLocal8Bit("I Lived (《赐予者》电影插曲|2015年苹果秋季发布会表演歌曲原曲) - OneRepublic"));
label_2i = new QLabel(this);
label_2i->setObjectName(QString::fromUtf8("label_2i"));
label_2i->setGeometry(QRect(0, 80, 831, 31));
label_2i->setFont(font);
label_2i->setStyleSheet(QString::fromUtf8("color: rgba(255, 255, 255, 170);"));
label_2i->setAlignment(Qt::AlignCenter);
label_2i->setText(QString::fromLocal8Bit("I Lived (《赐予者》电影插曲|2015年苹果秋季发布会表演歌曲原曲) - OneRepublic"));
label_i = new QLabel(this);
label_i->setObjectName(QString::fromUtf8("label_i"));
label_i->setGeometry(QRect(0, 190, 831, 31));
QFont font1;
font1.setFamily(QString::fromUtf8("Microsoft JhengHei UI"));
font1.setPointSize(12);
font1.setBold(true);
font1.setItalic(false);
font1.setUnderline(false);
font1.setWeight(75);
label_i->setFont(font1);
label_i->setStyleSheet(QString::fromUtf8("color: rgb(255, 255, 255);"));
label_i->setAlignment(Qt::AlignCenter);
label_i->setText(QString::fromLocal8Bit("I Lived (《赐予者》电影插曲|2015年苹果秋季发布会表演歌曲原曲) - OneRepublic"));
label_i1 = new QLabel(this);
label_i1->setObjectName(QString::fromUtf8("label_i1"));
label_i1->setGeometry(QRect(0, 250, 831, 31));
label_i1->setFont(font);
label_i1->setStyleSheet(QString::fromUtf8("color: rgba(255, 255, 255, 170);"));
label_i1->setAlignment(Qt::AlignCenter);
label_i1->setText(QString::fromLocal8Bit("I Lived (《赐予者》电影插曲|2015年苹果秋季发布会表演歌曲原曲) - OneRepublic"));
label_i2 = new QLabel(this);
label_i2->setObjectName(QString::fromUtf8("label_i2"));
label_i2->setGeometry(QRect(0, 300, 831, 31));
label_i2->setFont(font);
label_i2->setStyleSheet(QString::fromUtf8("color: rgba(255, 255, 255, 170);"));
label_i2->setAlignment(Qt::AlignCenter);
label_i2->setText(QString::fromLocal8Bit("I Lived (《赐予者》电影插曲|2015年苹果秋季发布会表演歌曲原曲) - OneRepublic"));
label_1i = new QLabel(this);
label_1i->setObjectName(QString::fromUtf8("label_1i"));
label_1i->setGeometry(QRect(0, 130, 831, 31));
label_1i->setFont(font);
label_1i->setStyleSheet(QString::fromUtf8("color: rgba(255, 255, 255, 170);"));
label_1i->setAlignment(Qt::AlignCenter);
label_1i->setText(QString::fromLocal8Bit("I Lived (《赐予者》电影插曲|2015年苹果秋季发布会表演歌曲原曲) - OneRepublic"));
label_i3 = new QLabel(this);
label_i3->setObjectName(QString::fromUtf8("label_i3"));
label_i3->setGeometry(QRect(0, 350, 831, 31));
label_i3->setFont(font);
label_i3->setStyleSheet(QString::fromUtf8("color: rgba(255, 255, 255, 170);"));
label_i3->setAlignment(Qt::AlignCenter);
label_i3->setText(QString::fromLocal8Bit("I Lived (《赐予者》电影插曲|2015年苹果秋季发布会表演歌曲原曲) - OneRepublic"));
// clear();//清空用于排版时的测试内容(.ui文件中)
}
LyricWidget::~LyricWidget()
{
}
//重载比较（歌词按时间排序）
bool operator <(const LyricLine& A, const LyricLine& B){
return A.time<B.time;
}
bool LyricWidget::process(QString filePath)
{
QFile lyricFile(filePath);
lyricFile.open(QFile::ReadOnly);
QString content(QString::fromLocal8Bit(lyricFile.readAll()));
lyricFile.close();
//先清空歌词
lines.clear();
const QRegExp rx("\\[(\\d+):(\\d+(\\.\\d+)?)\\]"); //用来查找时间标签的正则表达式
// 步骤1
int pos = rx.indexIn(content);
if (pos == -1) {
return false;
}
else {
int lastPos;
QList<int> timeLabels;
do {
// 步骤2
timeLabels << (rx.cap(1).toInt() * 60 + rx.cap(2).toDouble()) * 1000;
lastPos = pos + rx.matchedLength();
pos = rx.indexIn(content, lastPos);
if (pos == -1) {
QString text = content.mid(lastPos).trimmed();
foreach (const int& time, timeLabels)
lines.push_back(LyricLine(time, text));
break;
}
// 步骤3
QString text = content.mid(lastPos, pos - lastPos);
if (!text.isEmpty()) {
foreach (const int& time, timeLabels)
lines.push_back(LyricLine(time, text.trimmed()));
timeLabels.clear();
}
}
while (true);
// 步骤4
stable_sort(lines.begin(), lines.end());
}
if (lines.size()) {
return true;
}
return false;
}
int LyricWidget::getIndex(qint64 position)
{
if(!lines.size()){
return -1;
}else{
if(lines[0].time>=position){
return 0;
}
}
int i=1;
for(i=1;i<lines.size();i++){
if(lines[i-1].time<position && lines[i].time>=position){
return i-1;
}
}
return lines.size()-1;
}
void LyricWidget::show(qint64 position)
{
int index=getIndex(position);
if(index==-1){
label_3i->setText("");
label_2i->setText("");
label_1i->setText("");
label_i->setText(u8"当前歌曲无歌词");
label_i1->setText("");
label_i2->setText("");
label_i3->setText("");
}else{
label_3i->setText(getLyricText(index-3));
label_2i->setText(getLyricText(index-2));
label_1i->setText(getLyricText(index-1));
label_i->setText(getLyricText(index));
label_i1->setText(getLyricText(index+1));
label_i2->setText(getLyricText(index+2));
label_i3->setText(getLyricText(index+3));
}
}
QString LyricWidget::getLyricText(int index)
{
if(index<0 || index>=lines.size()){
return "";
}else{
return lines[index].text;
}
}
void LyricWidget::clear()
{
label_3i->setText("");
label_2i->setText("");
label_1i->setText("");
label_i->setText("");
label_i1->setText("");
label_i2->setText("");
label_i3->setText("");
}