Adding improved plugin and preset handling

Former-commit-id: ba6f9656a899c9e75427c47922c6aa0810531153

src/ImageProcessor.Web/NET45/Config/ImageProcessingSection.cs

@@ -1,9 +1,13 @@
-// -----------------------------------------------------------------------
+// --------------------------------------------------------------------------------------------------------------------
 // <copyright file="ImageProcessingSection.cs" company="James South">
-//     Copyright (c) James South.
-//     Licensed under the Apache License, Version 2.0.
+//   Copyright (c) James South.
+//   Licensed under the Apache License, Version 2.0.
 // </copyright>
-// -----------------------------------------------------------------------
+// <summary>
+//   Represents an image processing section within a configuration file.
+//   Nested syntax adapted from <see cref="http://tneustaedter.blogspot.co.uk/2011/09/how-to-create-one-or-more-nested.html" />
+// </summary>
+// --------------------------------------------------------------------------------------------------------------------
 
 namespace ImageProcessor.Web.Config
 {
@@ -19,6 +23,21 @@ namespace ImageProcessor.Web.Config
     public sealed class ImageProcessingSection : ConfigurationSection
     {
         #region Properties
+        /// <summary>
+        /// Gets the <see cref="T:ImageProcessor.Web.Config.ImageProcessingSection.PresetElementCollection"/>.
+        /// </summary>
+        /// <value>
+        /// The <see cref="T:ImageProcessor.Web.Config.ImageProcessingSection.PresetElementCollection"/>.
+        /// </value>
+        [ConfigurationProperty("presets", IsRequired = true)]
+        public PresetElementCollection Presets
+        {
+            get
+            {
+                return this["presets"] as PresetElementCollection;
+            }
+        }
+
         /// <summary>
         /// Gets the <see cref="T:ImageProcessor.Web.Config.ImageProcessingSection.PluginElementCollection"/>.
         /// </summary>
@@ -54,6 +73,115 @@ namespace ImageProcessor.Web.Config
         }
         #endregion
 
+        /// <summary>
+        /// Represents a PresetElement configuration element within the configuration.
+        /// </summary>
+        public class PresetElement : ConfigurationElement
+        {
+            /// <summary>
+            /// Gets or sets the name of the preset.
+            /// </summary>
+            /// <value>The name of the plugin.</value>
+            [ConfigurationProperty("name", DefaultValue = "", IsRequired = true)]
+            public string Name
+            {
+                get { return (string)this["name"]; }
+
+                set { this["name"] = value; }
+            }
+
+            /// <summary>
+            /// Gets or sets the value of the preset.
+            /// </summary>
+            /// <value>The full Type definition of the plugin</value>
+            [ConfigurationProperty("value", DefaultValue = "", IsRequired = true)]
+            public string Value
+            {
+                get { return (string)this["value"]; }
+
+                set { this["value"] = value; }
+            }
+        }
+
+        /// <summary>
+        /// Represents a PresetElementCollection collection configuration element within the configuration.
+        /// </summary>
+        public class PresetElementCollection : ConfigurationElementCollection
+        {
+            /// <summary>
+            /// Gets the type of the <see cref="T:System.Configuration.ConfigurationElementCollection"/>.
+            /// </summary>
+            /// <value>
+            /// The <see cref="T:System.Configuration.ConfigurationElementCollectionType"/> of this collection.
+            /// </value>
+            public override ConfigurationElementCollectionType CollectionType
+            {
+                get { return ConfigurationElementCollectionType.BasicMap; }
+            }
+
+            /// <summary>
+            /// Gets the name used to identify this collection of elements in the configuration file when overridden in a derived class.
+            /// </summary>
+            /// <value>
+            /// The name of the collection; otherwise, an empty string. The default is an empty string.
+            /// </value>
+            protected override string ElementName
+            {
+                get { return "preset"; }
+            }
+
+            /// <summary>
+            /// Gets or sets the <see cref="T:ImageProcessor.Web.Config.ImageProcessingSection.PresetElement"/>
+            /// at the specified index within the collection.
+            /// </summary>
+            /// <param name="index">The index at which to get the specified object.</param>
+            /// <returns>
+            /// The the <see cref="T:ImageProcessor.Web.Config.ImageProcessingSection.PresetElement"/>
+            /// at the specified index within the collection.
+            /// </returns>
+            public PresetElement this[int index]
+            {
+                get
+                {
+                    return (PresetElement)BaseGet(index);
+                }
+
+                set
+                {
+                    if (this.BaseGet(index) != null)
+                    {
+                        this.BaseRemoveAt(index);
+                    }
+
+                    this.BaseAdd(index, value);
+                }
+            }
+
+            /// <summary>
+            /// Creates a new Preset configuration element.
+            /// </summary>
+            /// <returns>
+            /// A new PluginConfig configuration element.
+            /// </returns>
+            protected override ConfigurationElement CreateNewElement()
+            {
+                return new PresetElement();
+            }
+
+            /// <summary>
+            /// Gets the element key for a specified PluginElement configuration element.
+            /// </summary>
+            /// <param name="element">
+            /// The <see cref="T:System.Configuration.ConfigurationElement">ConfigurationElement</see> 
+            /// to return the key for.
+            /// </param>
+            /// <returns>The element key for a specified PluginElement configuration element.</returns>
+            protected override object GetElementKey(ConfigurationElement element)
+            {
+                return ((PresetElement)element).Name;
+            }
+        }
+
         /// <summary>
         /// Represents a PluginElement configuration element within the configuration.
         /// </summary>
@@ -104,6 +232,19 @@ namespace ImageProcessor.Web.Config
         /// </summary>
         public class PluginElementCollection : ConfigurationElementCollection
         {
+            /// <summary>
+            /// Gets or sets a value indicating whether to auto load all plugins.
+            /// <remarks>Defaults to <value>True</value>.</remarks>
+            /// </summary>
+            /// <value>If True plugins are auto discovered and loaded from all assemblies otherwise they must be defined in the configuration file</value>
+            [ConfigurationProperty("autoLoadPlugins", DefaultValue = true, IsRequired = false)]
+            public bool AutoLoadPlugins
+            {
+                get { return (bool)this["autoLoadPlugins"]; }
+
+                set { this["autoLoadPlugins"] = value; }
+            }
+
             /// <summary>
             /// Gets the type of the <see cref="T:System.Configuration.ConfigurationElementCollection"/>.
             /// </summary>
@@ -126,18 +267,6 @@ namespace ImageProcessor.Web.Config
                 get { return "plugin"; }
             }
 
-            /// <summary>
-            /// Gets or sets the autoLoadPlugins of the plugin file.
-            /// </summary>
-            /// <value>If True plugins are auto discovered and loaded from all assemblies otherwise they must be defined in the configuration file</value>
-            [ConfigurationProperty("autoLoadPlugins", DefaultValue = true, IsRequired = false)]
-            public bool AutoLoadPlugins
-            {
-                get { return (bool)this["autoLoadPlugins"]; }
-
-                set { this["autoLoadPlugins"] = value; }
-            }
-
             /// <summary>
             /// Gets or sets the <see cref="T:ImageProcessor.Web.Config.ImageProcessingSection.PluginElement"/>
             /// at the specified index within the collection.
@@ -161,15 +290,15 @@ namespace ImageProcessor.Web.Config
                         this.BaseRemoveAt(index);
                     }
 
-                   this.BaseAdd(index, value);
+                    this.BaseAdd(index, value);
                 }
             }
 
             /// <summary>
-            /// Creates a new PluginConfig configuration element.
+            /// Creates a new Plugin configuration element.
             /// </summary>
             /// <returns>
-            /// A new PluginConfig configuration element.
+            /// A new Plugin configuration element.
             /// </returns>
             protected override ConfigurationElement CreateNewElement()
             {
@@ -279,10 +408,10 @@ namespace ImageProcessor.Web.Config
                 {
                     if (this.BaseGet(index) != null)
                     {
-                       this.BaseRemoveAt(index);
+                        this.BaseRemoveAt(index);
                     }
 
-                   this.BaseAdd(index, value);
+                    this.BaseAdd(index, value);
                 }
             }
 

src/ImageProcessor.Web/NET45/Config/ImageProcessorConfig.cs

@@ -8,9 +8,6 @@
 //   <see cref="http://csharpindepth.com/Articles/General/Singleton.aspx" />
 // </summary>
 // --------------------------------------------------------------------------------------------------------------------
-
-using System.Collections;
-
 namespace ImageProcessor.Web.Config
 {
     #region Using
@@ -45,6 +42,12 @@ namespace ImageProcessor.Web.Config
         private static readonly Dictionary<string, Dictionary<string, string>> PluginSettings =
             new Dictionary<string, Dictionary<string, string>>();
 
+        /// <summary>
+        /// A collection of the processing presets defined in the configuration. 
+        /// for available plugins.
+        /// </summary>
+        private static readonly Dictionary<string, string> PresetSettings = new Dictionary<string, string>();
+
         /// <summary>
         /// The processing configuration section from the current application configuration. 
         /// </summary>
@@ -183,6 +186,36 @@ namespace ImageProcessor.Web.Config
         #endregion
 
         #region Methods
+        /// <summary>
+        /// Returns the collection of the processing presets defined in the configuration.
+        /// </summary>
+        /// <param name="name">
+        /// The name of the plugin to get the settings for.
+        /// </param>
+        /// <returns>
+        /// The <see cref="T:Systems.Collections.Generic.Dictionary{string, string}"/> containing the processing presets defined in the configuration.
+        /// </returns>
+        public string GetPresetSettings(string name)
+        {
+            if (!PresetSettings.ContainsKey(name))
+            {
+                var presetElement =
+                    GetImageProcessingSection().Presets
+                    .Cast<ImageProcessingSection.PresetElement>()
+                    .FirstOrDefault(x => x.Name == name);
+
+                if (presetElement != null)
+                {
+                    PresetSettings.Add(presetElement.Name, presetElement.Value);
+                }
+            }
+
+            string preset;
+            PresetSettings.TryGetValue(name, out preset);
+
+            return preset;
+        }
+
         /// <summary>
         /// Returns the <see cref="T:ImageProcessor.Web.Config.ImageProcessingSection.SettingElementCollection"/> for the given plugin.
         /// </summary>
@@ -255,12 +288,12 @@ namespace ImageProcessor.Web.Config
         {
             if (this.GraphicsProcessors == null)
             {
-                if (GetImageProcessingSection().Plugins.AutoLoadPlugins)
+                try
                 {
-                    try
+                    if (GetImageProcessingSection().Plugins.AutoLoadPlugins)
                     {
                         // Build a list of native IGraphicsProcessor instances.
-                        Type type = typeof (IGraphicsProcessor);
+                        Type type = typeof(IGraphicsProcessor);
                         IEnumerable<Type> types =
                             AppDomain.CurrentDomain.GetAssemblies()
                                      .SelectMany(s => s.GetTypes())
@@ -277,51 +310,52 @@ namespace ImageProcessor.Web.Config
                             processor.Settings = this.GetPluginSettings(processor.GetType().Name);
                         }
                     }
-                    catch (ReflectionTypeLoadException ex)
+                    else
                     {
-                        StringBuilder sb = new StringBuilder();
-                        foreach (Exception exception in ex.LoaderExceptions)
+                        ImageProcessingSection.PluginElementCollection pluginConfigs = imageProcessingSection.Plugins;
+                        this.GraphicsProcessors = new List<IGraphicsProcessor>();
+                        foreach (ImageProcessingSection.PluginElement pluginConfig in pluginConfigs)
                         {
-                            sb.AppendLine(exception.Message);
-                            if (exception is FileNotFoundException)
+                            Type type = Type.GetType(pluginConfig.Type);
+
+                            if (type == null)
                             {
-                                FileNotFoundException fileNotFoundException = exception as FileNotFoundException;
-                                if (!string.IsNullOrEmpty(fileNotFoundException.FusionLog))
-                                {
-                                    sb.AppendLine("Fusion Log:");
-                                    sb.AppendLine(fileNotFoundException.FusionLog);
-                                }
+                                throw new ArgumentException("Couldn't load IGraphicsProcessor: " + pluginConfig.Type);
                             }
 
-                            sb.AppendLine();
+                            this.GraphicsProcessors.Add(Activator.CreateInstance(type) as IGraphicsProcessor);
                         }
 
-                        string errorMessage = sb.ToString();
-
-                        // Display or log the error based on your application.
-                        throw new Exception(errorMessage);
+                        // Add the available settings.
+                        foreach (IGraphicsProcessor processor in this.GraphicsProcessors)
+                        {
+                            processor.Settings = this.GetPluginSettings(processor.GetType().Name);
+                        }
                     }
                 }
-                else
+                catch (ReflectionTypeLoadException ex)
                 {
-                    var pluginConfigs = imageProcessingSection.Plugins;
-                    this.GraphicsProcessors = new List<IGraphicsProcessor>();
-                    foreach (ImageProcessingSection.PluginElement pluginConfig in pluginConfigs)
+                    StringBuilder stringBuilder = new StringBuilder();
+                    foreach (Exception exception in ex.LoaderExceptions)
                     {
-                        var type = Type.GetType(pluginConfig.Type);
-
-                        if (type == null)
+                        stringBuilder.AppendLine(exception.Message);
+                        if (exception is FileNotFoundException)
                         {
-                            throw new ArgumentException("Couldn't load IGraphicsProcessor: " + pluginConfig.Type);
+                            FileNotFoundException fileNotFoundException = exception as FileNotFoundException;
+                            if (!string.IsNullOrEmpty(fileNotFoundException.FusionLog))
+                            {
+                                stringBuilder.AppendLine("Fusion Log:");
+                                stringBuilder.AppendLine(fileNotFoundException.FusionLog);
+                            }
                         }
-                        this.GraphicsProcessors.Add((Activator.CreateInstance(type) as IGraphicsProcessor));
-                    }
 
-                    // Add the available settings.
-                    foreach (IGraphicsProcessor processor in this.GraphicsProcessors)
-                    {
-                        processor.Settings = this.GetPluginSettings(processor.GetType().Name);
+                        stringBuilder.AppendLine();
                     }
+
+                    string errorMessage = stringBuilder.ToString();
+
+                    // Display or log the error based on your application.
+                    throw new Exception(errorMessage);
                 }
             }
         }

src/ImageProcessor.Web/NET45/HttpModules/ImageProcessingModule.cs

@@ -542,17 +542,14 @@ namespace ImageProcessor.Web.HttpModules
         /// </returns>
         private string ReplacePresetsInQueryString(string queryString)
         {
-            // We use the processor config system to store the preset values.
-            Dictionary<string, string> presets = ImageProcessorConfig.Instance.GetPluginSettings("Preset");
-
             foreach (Match match in PresetRegex.Matches(queryString))
             {
                 if (match.Success)
                 {
-                    // Set the index on the first instance only.
-                    string preset = match.Value;
-                    string replacements;
-                    presets.TryGetValue(preset.Split('=')[1], out replacements);
+                    string preset = match.Value.Split('=')[1];
+
+                    // We use the processor config system to store the preset values.
+                    string replacements = ImageProcessorConfig.Instance.GetPresetSettings(preset);
                     queryString = Regex.Replace(queryString, preset, replacements ?? string.Empty);
                 }
             }

src/TestWebsites/NET4/config/imageprocessor/processing.config

@@ -1,17 +1,42 @@
 <?xml version="1.0" encoding="utf-8" ?>
 <processing>
-  <plugins>
-    <plugin name="Resize">
+  <presets>
+    <preset name="demo" value="width=300&#038;height=150&#038;bgcolor=transparent"/>
+  </presets>
+  <plugins autoLoadPlugins="false">
+    <plugin name="Alpha" type="ImageProcessor.Processors.Alpha, ImageProcessor"/>
+    <plugin name="Brightness" type="ImageProcessor.Processors.Brightness, ImageProcessor"/>
+    <plugin name="Contrast" type="ImageProcessor.Processors.Contrast, ImageProcessor"/>
+    <plugin name="Crop" type="ImageProcessor.Processors.Crop, ImageProcessor"/>
+    <plugin name="Filter" type="ImageProcessor.Processors.Filter, ImageProcessor"/>
+    <plugin name="Flip" type="ImageProcessor.Processors.Flip, ImageProcessor"/>
+    <plugin name="Format" type="ImageProcessor.Processors.Format, ImageProcessor"/>
+    <plugin name="GaussianBlur" type="ImageProcessor.Processors.GaussianBlur, ImageProcessor">
       <settings>
-        <setting key="MaxWidth" value="3000"/>
-        <setting key="MaxHeight" value="3000"/>
+        <setting key="MaxSize" value="22"/>
+        <setting key="MaxSigma" value="5.1"/>
+        <setting key="MaxThreshold" value="100"/>
       </settings>
     </plugin>
-    <plugin name="Preset">
+    <plugin name="GaussianSharpen" type="ImageProcessor.Processors.GaussianSharpen, ImageProcessor">
       <settings>
-        <setting key="a" value="width=300&#038;height=150"/>
+        <setting key="MaxSize" value="22"/>
+        <setting key="MaxSigma" value="5.1"/>
+        <setting key="MaxThreshold" value="100"/>
+      </settings>
+    </plugin>
+    <plugin name="Quality" type="ImageProcessor.Processors.Quality, ImageProcessor"/>
+    <plugin name="Resize" type="ImageProcessor.Processors.Resize, ImageProcessor">
+      <settings>
+        <setting key="MaxWidth" value="3000"/>
+        <setting key="MaxHeight" value="3000"/>
       </settings>
     </plugin>
+    <plugin name="Rotate" type="ImageProcessor.Processors.Rotate, ImageProcessor"/>
+    <plugin name="RoundedCorners" type="ImageProcessor.Processors.RoundedCorners, ImageProcessor"/>
+    <plugin name="Saturation" type="ImageProcessor.Processors.Saturation, ImageProcessor"/>
+    <plugin name="Vignette" type="ImageProcessor.Processors.Vignette, ImageProcessor"/>
+    <plugin name="Watermark" type="ImageProcessor.Processors.Watermark, ImageProcessor"/>
   </plugins>
 </processing>
 

src/TestWebsites/NET45/Test_Website_NET45/config/imageprocessor/processing.config

@@ -1,5 +1,8 @@
 <?xml version="1.0" encoding="utf-8" ?>
 <processing>
+  <presets>
+    <preset name="demo" value="width=300&#038;height=150&#038;bgcolor=transparent"/>
+  </presets>
   <plugins autoLoadPlugins="false">
     <plugin name="Alpha" type="ImageProcessor.Processors.Alpha, ImageProcessor"/>
     <plugin name="Brightness" type="ImageProcessor.Processors.Brightness, ImageProcessor"/>
@@ -34,11 +37,6 @@
     <plugin name="Saturation" type="ImageProcessor.Processors.Saturation, ImageProcessor"/>
     <plugin name="Vignette" type="ImageProcessor.Processors.Vignette, ImageProcessor"/>
     <plugin name="Watermark" type="ImageProcessor.Processors.Watermark, ImageProcessor"/>
-    <plugin name="Preset" type="ImageProcessor.Web.Preset, ImageProcessor">
-      <settings>
-        <setting key="demo" value="width=300&#038;height=150&#038;&#038;bgcolor=transparent"/>
-      </settings>
-    </plugin>
   </plugins>
 </processing>
 

src/TestWebsites/NET45/Test_Website_Webforms_NET45/config/imageprocessor/processing.config

@@ -1,31 +1,42 @@
 <?xml version="1.0" encoding="utf-8" ?>
 <processing>
-  <plugins>
-    <plugin name="Resize">
-      <settings>
-        <setting key="MaxWidth" value="3000"/>
-        <setting key="MaxHeight" value="3000"/>
-      </settings>
-    </plugin>
-    <plugin name="GaussianBlur">
+  <presets>
+    <preset name="demo" value="width=300&#038;height=150&#038;bgcolor=transparent"/>
+  </presets>
+  <plugins autoLoadPlugins="false">
+    <plugin name="Alpha" type="ImageProcessor.Processors.Alpha, ImageProcessor"/>
+    <plugin name="Brightness" type="ImageProcessor.Processors.Brightness, ImageProcessor"/>
+    <plugin name="Contrast" type="ImageProcessor.Processors.Contrast, ImageProcessor"/>
+    <plugin name="Crop" type="ImageProcessor.Processors.Crop, ImageProcessor"/>
+    <plugin name="Filter" type="ImageProcessor.Processors.Filter, ImageProcessor"/>
+    <plugin name="Flip" type="ImageProcessor.Processors.Flip, ImageProcessor"/>
+    <plugin name="Format" type="ImageProcessor.Processors.Format, ImageProcessor"/>
+    <plugin name="GaussianBlur" type="ImageProcessor.Processors.GaussianBlur, ImageProcessor">
       <settings>
         <setting key="MaxSize" value="22"/>
         <setting key="MaxSigma" value="5.1"/>
         <setting key="MaxThreshold" value="100"/>
       </settings>
     </plugin>
-    <plugin name="GaussianSharpen">
+    <plugin name="GaussianSharpen" type="ImageProcessor.Processors.GaussianSharpen, ImageProcessor">
       <settings>
         <setting key="MaxSize" value="22"/>
         <setting key="MaxSigma" value="5.1"/>
         <setting key="MaxThreshold" value="100"/>
       </settings>
     </plugin>
-    <plugin name="Preset">
+    <plugin name="Quality" type="ImageProcessor.Processors.Quality, ImageProcessor"/>
+    <plugin name="Resize" type="ImageProcessor.Processors.Resize, ImageProcessor">
       <settings>
-        <setting key="demo" value="width=300&#038;height=150"/>
+        <setting key="MaxWidth" value="3000"/>
+        <setting key="MaxHeight" value="3000"/>
       </settings>
     </plugin>
+    <plugin name="Rotate" type="ImageProcessor.Processors.Rotate, ImageProcessor"/>
+    <plugin name="RoundedCorners" type="ImageProcessor.Processors.RoundedCorners, ImageProcessor"/>
+    <plugin name="Saturation" type="ImageProcessor.Processors.Saturation, ImageProcessor"/>
+    <plugin name="Vignette" type="ImageProcessor.Processors.Vignette, ImageProcessor"/>
+    <plugin name="Watermark" type="ImageProcessor.Processors.Watermark, ImageProcessor"/>
   </plugins>
 </processing>