Implement JSON config loader

src/config.cpp

@@ -32,6 +32,10 @@
 
 #include <QDir>
 #include <QSettings>
+#include <QWebPage>
+#include <QWebFrame>
+
+#include "terminal.h"
 
 // public:
 Config::Config(QObject *parent)
@@ -186,6 +190,38 @@ void Config::loadIniFile(const QString &filePath)
     }
 }
 
+void Config::loadJsonFile(const QString &filePath)
+{
+    QString jsonConfig;
+    if (!readFile(normalisePath(filePath), &jsonConfig)) {
+        Terminal::instance()->cerr("Unable to open config: \"" + filePath + "\"");
+        return;
+    } else if (jsonConfig.isEmpty()) {
+        return;
+    } else if (!jsonConfig.startsWith('{') || !jsonConfig.endsWith('}')) {
+        Terminal::instance()->cerr("Config file MUST be in JSON format!");
+        return;
+    }
+
+    // Load configurator
+    QString configurator;
+    if (!readFile(":/configurator.js", &configurator)) {
+        Terminal::instance()->cerr("Unable to load JSON configurator!");
+        return;
+    } else if (configurator.isEmpty()) {
+        Terminal::instance()->cerr("Unable to set-up JSON configurator!");
+        return;
+    }
+
+    QWebPage webPage;
+
+    // Add the config object
+    webPage.mainFrame()->addToJavaScriptWindowObject("config", this);
+
+    // Apply the settings
+    webPage.mainFrame()->evaluateJavaScript(configurator.arg(jsonConfig));
+}
+
 bool Config::autoLoadImages() const
 {
     return m_autoLoadImages;
@@ -424,4 +460,23 @@ QString Config::normalisePath(const QString &path)
     return path.isEmpty() ? path : QDir::fromNativeSeparators(path);
 }
 
+// THIS METHOD ASSUMES THAT content IS *NEVER* NULL!
+bool Config::readFile(const QString &path, QString *const content)
+{
+    // Ensure empty content
+    content->clear();
+
+    // Check existence and try to open as text
+    QFile file(path);
+    if (!file.exists() || !file.open(QFile::ReadOnly | QFile::Text)) {
+        return false;
+    }
+
+    content->append(QString::fromUtf8(file.readAll()).trimmed());
+
+    file.close();
+
+    return true;
+}
+
 const QString Config::CONFIG_FILE_NAME = ".phantomjsrc";

src/config.h

@@ -53,6 +53,7 @@ public:
     void init(const QStringList *const args);
     void processArgs(const QStringList &args);
     void loadIniFile(const QString &filePath);
+    void loadJsonFile(const QString &filePath);
 
     bool autoLoadImages() const;
     void setAutoLoadImages(const bool value);
@@ -122,6 +123,7 @@ private:
     static QString asString(const QVariant &value);
     static QString joinPaths(const QString &path1, const QString &path2);
     static QString normalisePath(const QString &path);
+    static bool readFile(const QString &path, QString *const content);
 
     static const QString CONFIG_FILE_NAME;
 };

src/configurator.js

@@ -0,0 +1,17 @@
+(function (opts) {
+    var i;
+
+    opts = opts || {};
+
+    if (typeof opts !== 'object') {
+        return;
+    }
+
+    for (i in opts) {
+        if (opts.hasOwnProperty(i) && typeof opts[i] !== 'undefined') {
+            config[i] = opts[i];
+        }
+    }
+
+	return null;
+})((%1));

src/phantomjs.pro

@@ -35,7 +35,8 @@ SOURCES += phantom.cpp \
     encoding.cpp \
     config.cpp
 
-OTHER_FILES = bootstrap.js usage.txt
+OTHER_FILES = bootstrap.js usage.txt \
+    configurator.js
 
 include(gif/gif.pri)
 

src/phantomjs.qrc

@@ -4,5 +4,6 @@
         <file>coffee-script.js</file>
         <file>usage.txt</file>
         <file>bootstrap.js</file>
+        <file>configurator.js</file>
     </qresource>
 </RCC>