Qt Qml webview 打开本地PDF

/* * * Copyright 2022 Leonardo Tarollo (LTDev) <develtar@gmail.com> * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * */ #include "fileutils.h" namespace LTDev { FileUtils::FileUtils(QObject *parent) : QObject(parent) { } /** * * Writes the passed content in the provided path. * * @param fileContent: the string to insert into the file * @param filePath: the path of the file in which to write the content * **/ void FileUtils::write(const QString &fileContent, const QString &filePath){ QFile file(filePath); // Write into file if ( file.open(QIODevice::ReadWrite| QIODevice::Truncate | QIODevice::Text)) { QTextStream stream( &file ); #if (QT_VERSION >= QT_VERSION_CHECK(5, 15, 0)) stream << fileContent << Qt::endl; #else stream << fileContent << endl; #endif file.close(); } } /** * * Returns the content of the file passed * * @param filePath: the path of the file to read * * @return QString * **/ QString FileUtils::read(QString filePath) { QString lines=""; if(exists(filePath)){ QFile file(filePath); if (file.open(QIODevice::ReadOnly | QIODevice::Text)) { QTextStream stream(&file); while (!stream.atEnd()) { lines.append(stream.readLine()); } } file.close(); } return lines; } /** * * Returns true if the (file or dir) path exists, false otherwise * * @param path: the path to check * * @return bool * **/ bool FileUtils::exists(const QString &path) { if(path.isNull() || path.isEmpty()) return false; // Checks the existance of path and "file://"+path return QFile::exists(path) || QFileInfo::exists(QUrl(path).toString()) || QFileInfo::exists(QUrl(path).toLocalFile()); } /** * Copies the source folder in the destination folder. * * @param sourceFolder: the folder to copy * @param destFolder: the destination folder * * @return bool */ bool FileUtils::copyDirs(const QString &sourceFolder, const QString &destFolder) { // Check if source folder exists QDir sourceDir(sourceFolder); if(!exists(sourceFolder)) return false; // Create destination dir if it doesn't exist QDir destDir(destFolder); if(!destDir.exists()){ QDir().mkpath(destFolder); } // Copy all files QStringList files = sourceDir.entryList(QDir::Files); for(int i = 0; i< files.count(); i++){ QString srcName = sourceFolder + "/" + files[i]; QString destName = destFolder + "/" + files[i]; QFile::copy(srcName, destName); } // Copy all sub folders recursively files.clear(); files = sourceDir.entryList(QDir::AllDirs | QDir::NoDotAndDotDot); for(int i = 0; i< files.count(); i++){ QString srcName = sourceFolder + "/" + files[i]; QString destName = destFolder + "/" + files[i]; copyDirs(srcName, destName); } return true; } /** * * Removes a directory recursively. * * @param dirPath: the path of the directory to delete * * @warning pay attention using this method as root * * @return bool * **/ bool FileUtils::removeDir(const QString &dirPath){ if(dirPath.compare("")==0) return false; if(QFile(dirPath).exists()) return QDir(dirPath).removeRecursively(); return false; } /** * * Concatenates the given paths. * * @param paths: the list of paths to concatenate * * @return QString * **/ QString FileUtils::joinPaths(const QStringList &paths) { QString fullPath = ""; for(QString path: paths){ fullPath = QDir(fullPath).filePath(path); } return fullPath; } }