ToolBox · 正則表達式

Qt 插件 《 ToolBox 》目錄

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簡述

將插件接口做好後，就可以開始插件的開發了。由於在工作中，經常要用到正則表達式，所以，這第一個插件就先寫一個正則表達式測試工具好了。還是在之前的多工程目錄下建立一個插件子工程。

工程文件

添加元數據的json 文件： DISTFILES += RegExp.json
目標文件放置目錄：DESTDIR = ../bin/plugins
依賴路徑：DEPENDPATH += ../bin
添加頭文件搜索路徑：INCLUDEPATH += $$PWD/../PluginWidget
包含插件接口庫：LIBS += -L../bin/ -lPluginWidget
添加頭文件搜索路徑：INCLUDEPATH += \$\$PWD/../MyShareLibrary
包含公共庫：LIBS += -L../bin/ -lMyShareLibrary

QT       += core gui widgets

TARGET = RegExp
TEMPLATE = lib
CONFIG += plugin

DEFINES += QT_DEPRECATED_WARNINGS

SOURCES += \
    regexp.cpp

HEADERS += \
    regexp.h

FORMS += \
    regexp.ui

DISTFILES += RegExp.json

DESTDIR = ../bin/plugins

DEPENDPATH += ../bin

INCLUDEPATH += $$PWD/../PluginWidget
LIBS += -L../bin/ -lPluginWidget

INCLUDEPATH += $$PWD/../MyShareLibrary
LIBS += -L../bin/ -lMyShareLibrary

這裏，我們將插件生成在 ../bin/plugins目錄中。

頭文件

Q_PLUGIN_METADATA 宏包含插件的 IID，並指向一個包含插件元數據的 Json 文件。該 Json 文件會被編譯到插件中，無需安裝。Q_INTERFACES 宏用於告訴 Qt 該類實現的接口。

#ifndef REGEXP_H
#define REGEXP_H

#include <QWidget>
#include "pluginwidget.h"

namespace Ui {
class RegExp;
}

class RegExp : public PluginWidget
{
    Q_OBJECT
    Q_PLUGIN_METADATA(IID PluginWidget_iid FILE "RegExp.json")
    Q_INTERFACES(PluginWidget)

public:
    explicit RegExp(QWidget *parent = 0);
    ~RegExp();

    virtual RegExp *newObj() Q_DECL_OVERRIDE;

private slots:
    void slot_regExp();
    void on_openFile_clicked();

private:
    Ui::RegExp *ui;
};

#endif // REGEXP_H

源文件

#include "regexp.h"
#include "ui_regexp.h"
#include "myassistant.h"

#include <QDir>
#include <QDebug>
#include <QClipboard>
#include <QFileDialog>
#include <QRegularExpression>

namespace  {
const QString configPath = "./Configuration/RegExp/";

QString patternToCode(QString pattern)
{
    pattern.replace(QStringLiteral("\\"), QStringLiteral("\\\\"));
    pattern.replace(QStringLiteral("\""), QStringLiteral("\\\""));
    return pattern;
}

void writeConfigFile(QString txt, QString name)
{
    My::writeFile(configPath + name, txt.toLocal8Bit());
}

QString readConfigFile(QString name)
{
    return My::readFile(configPath + name);
}

}//namespace end

RegExp::RegExp(QWidget *parent) :
    PluginWidget(parent),
    ui(new Ui::RegExp)
{
    ui->setupUi(this);

    connect(ui->refresh, &QToolButton::clicked, this, &RegExp::slot_regExp);
    connect(ui->patternLineEdit, &QLineEdit::textChanged, this, &RegExp::slot_regExp);
    connect(ui->subjectPlainTextEdit, &QPlainTextEdit::textChanged, this, &RegExp::slot_regExp);
    connect(ui->clearSubjectBtn, &QToolButton::clicked, ui->subjectPlainTextEdit, &QPlainTextEdit::clear);

    connect(ui->cpPatternBtn, &QToolButton::clicked, [&]{
        QGuiApplication::clipboard()->setText(ui->patternLineEdit->text());
    });

    connect(ui->cpEscapedPatternBtn, &QToolButton::clicked, [&]{
        QGuiApplication::clipboard()->setText(ui->escapedPatternLabel->text());
    });

    ui->patternLineEdit->setText(readConfigFile("pattern.txt"));
    ui->subjectPlainTextEdit->setPlainText(readConfigFile("subject.txt"));
}

RegExp::~RegExp()
{
    writeConfigFile(ui->patternLineEdit->text(),"pattern.txt");
    writeConfigFile(ui->subjectPlainTextEdit->toPlainText(),"subject.txt");

    delete ui;
}

RegExp *RegExp::newObj()
{
    static bool flag = false;

    if(flag) {
        return new RegExp();

    } else {
        flag = true;
        return this;
    }
}

void RegExp::slot_regExp()
{
    QString sourceData = ui->subjectPlainTextEdit->toPlainText();
    QString pattern  = ui->patternLineEdit->text();

    ui->matchResult->clear();
    ui->countLab->setText(QString("%1").arg(0));
    ui->escapedPatternLabel->setText(patternToCode(pattern));

    if(sourceData.isEmpty() || pattern.isEmpty()) {
        return;
    }

    QRegularExpression rx(pattern);
    QStringList texts = rx.match(sourceData).capturedTexts();

    if(texts.isEmpty()) {
        ui->patternLineEdit->setStyleSheet("color: rgb(255, 0, 0);");
        return ;

    } else {
        ui->patternLineEdit->setStyleSheet("color: rgb(0, 0, 0);");
    }

    int count = 0;
    for(QString text : texts) {
        ui->matchResult->appendPlainText(QString("第 %1 個匹配:").arg(count));
        ui->matchResult->appendPlainText(text);
        ui->matchResult->appendPlainText("");
        count++;
    }
    ui->countLab->setText(QString("%1").arg(count));
}

void RegExp::on_openFile_clicked()
{
    QString path = QFileDialog::getOpenFileName(this);
    QFile file(path);
    if (file.open(QIODevice::ReadOnly|QIODevice::Text)) {
        ui->subjectPlainTextEdit->setPlainText(file.readAll());
    }
    file.close();
}