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Update JSBaker.cpp
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utkarshgautamnyu
GitHub
parent
9e91ab7630
commit
b86dd9dea4
1 changed files with 69 additions and 120 deletions
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@ -9,11 +9,13 @@
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// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
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//
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#include <PathUtils.h> // To generate Temporary directory
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#include <PathUtils.h>
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#include "JSBaker.h"
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#include "Baker.h"
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const int ASCII_CHARACTERS_UPPER_LIMIT = 126;
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JSBaker::JSBaker(const QUrl& jsURL, const QString& bakedOutputDir) :
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_jsURL(jsURL),
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_bakedOutputDir(bakedOutputDir)
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@ -22,58 +24,22 @@ JSBaker::JSBaker(const QUrl& jsURL, const QString& bakedOutputDir) :
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};
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void JSBaker::bake() {
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auto tempDir = PathUtils::generateTemporaryDir();
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qCDebug(js_baking) << "JS Baker " << _jsURL << "bake starting";
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if (tempDir.isEmpty()) {
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handleError("Failed to create a temporary directory.");
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return;
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}
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_tempDir = tempDir;
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_originalJSFilePath = _tempDir.filePath(_jsURL.fileName());
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qCDebug(js_baking) << "Made temporary dir " << _tempDir;
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qCDebug(js_baking) << "Origin file path: " << _originalJSFilePath;
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// When source JS is loaded, trigger the importJS method
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connect(this, &JSBaker::sourceJSLoaded, this, &JSBaker::importJS);
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// Make a local copy of the JS File
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loadSourceJS();
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}
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void JSBaker::loadSourceJS() {
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// load the local file
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QFile localJS{ _jsURL.toLocalFile() };
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if (!localJS.exists()) {
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handleError("Could not find " + _jsURL.toString());
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return;
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}
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// make a copy of local file at _originalJSFilePath
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qCDebug(js_baking) << "Local file url: " << _jsURL << _jsURL.toString() << _jsURL.toLocalFile() << ", copying to: " << _originalJSFilePath;
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localJS.copy(_originalJSFilePath);
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// emit signal to indicate script is ready to import
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emit sourceJSLoaded();
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// Import the script to start baking
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importJS();
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}
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void JSBaker::importJS() {
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// Import the file to be processed from _originalJSFilePath
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QFile jsFile(_originalJSFilePath);
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// Import the file to be processed from _jsURL
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QFile jsFile(_jsURL.toLocalFile());
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if (!jsFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
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handleError("Error opening " + _originalJSFilePath + " for reading");
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}
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if (hasErrors()) {
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// Return if cannot open file
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return;
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} else {
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// Import successful, Call the baking function with the imported file
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bakeJS(&jsFile);
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}
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// Import successful, Call the baking function with the imported file
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bakeJS(&jsFile);
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}
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void JSBaker::bakeJS(QFile* inputFile) {
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@ -82,8 +48,8 @@ void JSBaker::bakeJS(QFile* inputFile) {
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outputFile.open(QIODevice::WriteOnly | QIODevice::Text);
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// Read from inputFile and write to outputFile per character
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QTextStream readCharacter(inputFile);
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QTextStream writeCharacter(&outputFile);
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QTextStream in(inputFile);
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QTextStream out(&outputFile);
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// Algorithm requires the knowledge of previous and next character for each character read
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QChar currentCharacter;
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@ -91,35 +57,33 @@ void JSBaker::bakeJS(QFile* inputFile) {
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// Initialize previousCharacter with new line
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QChar previousCharacter = '\n';
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// Input currentCharacter
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readCharacter >> currentCharacter;
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in >> currentCharacter;
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while (!readCharacter.atEnd()) {
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// input nextCharacter
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readCharacter >> nextCharacter;
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while (!in.atEnd()) {
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in >> nextCharacter;
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if (currentCharacter == '\r') {
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writeCharacter << '\n';
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out << '\n';
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} else if (currentCharacter == '/') {
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// Check if single line comment i.e. //
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if (nextCharacter == '/') {
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handleSingleLineComments(&readCharacter);
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handleSingleLineComments(&in);
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//Start fresh after handling comments
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previousCharacter = '\n';
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readCharacter >> currentCharacter;
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in >> currentCharacter;
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continue;
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} else if (nextCharacter == '*') {
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// Check if multi line comment i.e. /*
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handleMultiLineComments(&readCharacter);
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handleMultiLineComments(&in);
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//Start fresh after handling comments
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previousCharacter = '\n';
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readCharacter >> currentCharacter;
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in >> currentCharacter;
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continue;
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} else {
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// If '/' is not followed by '/' or '*' print '/'
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writeCharacter << currentCharacter;
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out << currentCharacter;
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}
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} else if (isControlCharacter(currentCharacter)) {
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// Check if white space or tab
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@ -127,7 +91,7 @@ void JSBaker::bakeJS(QFile* inputFile) {
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// Skip multiple spaces or tabs
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if (isControlCharacter(nextCharacter)) {
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while (isControlCharacter(nextCharacter)) {
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readCharacter >> nextCharacter;
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in >> nextCharacter;
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if (nextCharacter == '\n') {
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break;
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}
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@ -136,43 +100,42 @@ void JSBaker::bakeJS(QFile* inputFile) {
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// check if space can be omitted
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if (!canOmitSpace(previousCharacter, nextCharacter)) {
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writeCharacter << ' ';
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out << ' ';
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}
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} else if (currentCharacter == '\n') {
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// Check if new line
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//Skip multiple new lines
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//Skip new line followed by space or tab
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if (nextCharacter == '\n' || isControlCharacter(nextCharacter)) {
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while (nextCharacter == '\n' || isControlCharacter(nextCharacter)) {
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readCharacter >> nextCharacter;
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}
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}
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while (nextCharacter == '\n' || isControlCharacter(nextCharacter)) {
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in >> nextCharacter;
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}
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// Check if new line can be omitted
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if (!canOmitNewLine(previousCharacter, nextCharacter)) {
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writeCharacter << '\n';
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out << '\n';
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}
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} else if (isQuote(currentCharacter)) {
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// Print the current quote and nextCharacter as is
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writeCharacter << currentCharacter;
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writeCharacter << nextCharacter;
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out << currentCharacter;
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out << nextCharacter;
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// Store the type of quote we are processing
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QChar quote = currentCharacter;
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// Don't modify the quoted strings
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while (nextCharacter != quote) {
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readCharacter >> nextCharacter;
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writeCharacter << nextCharacter;
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in >> nextCharacter;
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out << nextCharacter;
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}
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//Start fresh after handling quoted strings
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previousCharacter = nextCharacter;
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readCharacter >> currentCharacter;
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in >> currentCharacter;
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continue;
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} else {
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// In all other cases write the currentCharacter to outputFile
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writeCharacter << currentCharacter;
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out << currentCharacter;
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}
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previousCharacter = currentCharacter;
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@ -181,7 +144,7 @@ void JSBaker::bakeJS(QFile* inputFile) {
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//write currentCharacter to output file when nextCharacter reaches EOF
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if (currentCharacter != '\n') {
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writeCharacter << currentCharacter;
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out << currentCharacter;
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}
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// Reading done. Closing the inputFile
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@ -207,38 +170,36 @@ void JSBaker::exportJS(QFile* bakedFile) {
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if (!bakedFile->open(QIODevice::WriteOnly)) {
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handleError("Error opening " + _bakedJSFilePath + " for writing");
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}
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if (hasErrors()) {
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// cannot open bakedFile return
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return;
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} else {
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_outputFiles.push_back(_bakedJSFilePath);
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qCDebug(js_baking) << "Exported" << _jsURL << "with re-written paths to" << _bakedJSFilePath;
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}
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// Export successful
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_outputFiles.push_back(_bakedJSFilePath);
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qCDebug(js_baking) << "Exported" << _jsURL << "with re-written paths to" << _bakedJSFilePath;
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// Exporting done. Closing the outputFile
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bakedFile->close();
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// emit signal to indicate the JS baking is finished
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emit finished();
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}
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void JSBaker::handleSingleLineComments(QTextStream * readCharacter) {
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void JSBaker::handleSingleLineComments(QTextStream * in) {
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QChar character;
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while (!readCharacter->atEnd()) {
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*readCharacter >> character;
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if (character == '\n')
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break;
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while (!in->atEnd()) {
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*in >> character;
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if (character == '\n') {
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break;
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}
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}
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return;
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}
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void JSBaker::handleMultiLineComments(QTextStream * readCharacter) {
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void JSBaker::handleMultiLineComments(QTextStream * in) {
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QChar character;
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while (!readCharacter->atEnd()) {
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*readCharacter >> character;
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while (!in->atEnd()) {
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*in >> character;
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if (character == '*') {
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if (readCharacter->read(1) == '/') {
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if (in->read(1) == '/') {
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return;
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}
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}
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@ -247,58 +208,46 @@ void JSBaker::handleMultiLineComments(QTextStream * readCharacter) {
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}
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bool JSBaker::canOmitSpace(QChar previousCharacter, QChar nextCharacter) {
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if ((isAlphanum(previousCharacter) || isNonAscii(previousCharacter) || isSpecialCharacter(previousCharacter)) &&
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(isAlphanum(nextCharacter) || isNonAscii(nextCharacter) || isSpecialCharacter(nextCharacter))
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) {
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return false;
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}
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return true;
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return(!((isAlphanum(previousCharacter) || isNonAscii(previousCharacter) || isSpecialCharacter(previousCharacter)) &&
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(isAlphanum(nextCharacter) || isNonAscii(nextCharacter) || isSpecialCharacter(nextCharacter)))
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);
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}
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bool JSBaker::canOmitNewLine(QChar previousCharacter, QChar nextCharacter) {
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if ((isAlphanum(previousCharacter) || isNonAscii(previousCharacter) || isSpecialCharacterPrevious(previousCharacter)) &&
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(isAlphanum(nextCharacter) || isNonAscii(nextCharacter) || isSpecialCharacterNext(nextCharacter))
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) {
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return false;
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}
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return true;
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return (!((isAlphanum(previousCharacter) || isNonAscii(previousCharacter) || isSpecialCharacterPrevious(previousCharacter)) &&
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(isAlphanum(nextCharacter) || isNonAscii(nextCharacter) || isSpecialCharacterNext(nextCharacter)))
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);
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}
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//Check if character is alphabet, number or one of the following: '_', '$', '\\'
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//Check if character is alphabet, number or one of the following: '_', '$', '\\' or a non-ASCII character
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bool JSBaker::isAlphanum(QChar c) {
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return ((c >= 'a' && c <= 'z') || (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z')
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|| c == '_' || c == '$' || c == '\\' || c > 126);
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|| c == '_' || c == '$' || c == '\\' || c > ASCII_CHARACTERS_UPPER_LIMIT);
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}
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bool JSBaker::isNonAscii(QChar c) {
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return ((int)c.toLatin1() > 127);
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return ((int)c.toLatin1() > ASCII_CHARACTERS_UPPER_LIMIT);
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}
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// If previous and next characters are special characters, don't omit space
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bool JSBaker::isSpecialCharacter(QChar c) {
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if (c == '\'' || c == '$' || c == '_' || c == '/') {
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return true;
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}
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return false;
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return (c == '\'' || c == '$' || c == '_' || c == '/');
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}
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// If previous character is a special character, maybe don't omit new line (depends on next character as well)
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bool JSBaker::isSpecialCharacterPrevious(QChar c) {
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if (c == '\'' || c == '$' || c == '_' || c == '}' || c == ']' || c == ')' || c == '+' || c == '-'
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|| c == '"' || c == "'") {
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return true;
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}
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return false;
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return (c == '\'' || c == '$' || c == '_' || c == '}' || c == ']' || c == ')' || c == '+' || c == '-'
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|| c == '"' || c == "'");
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}
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// If next character is a special character, maybe don't omit new line (depends on previous character as well)
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bool JSBaker::isSpecialCharacterNext(QChar c) {
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if (c == '\'' || c == '$' || c == '_' || c == '{' || c == '[' || c == '(' || c == '+' || c == '-') {
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return true;
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}
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return false;
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return (c == '\'' || c == '$' || c == '_' || c == '{' || c == '[' || c == '(' || c == '+' || c == '-');
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}
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// Check if white space or tab
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bool JSBaker::isControlCharacter(QChar c) {
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return (c == ' ' || (int)c.toLatin1() == 9);
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return (c == ' ' || c == '\t');
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}
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// Check If the currentCharacter is " or ' or `
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