1 files changed, 226 insertions, 0 deletions
diff --git a/Source/WebInspectorUI/UserInterface/Models/SourceCode.js b/Source/WebInspectorUI/UserInterface/Models/SourceCode.js
new file mode 100644
index 000000000..29e8f3231
--- /dev/null
+++ b/Source/WebInspectorUI/UserInterface/Models/SourceCode.js
@@ -0,0 +1,226 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WebInspector.SourceCode = class SourceCode extends WebInspector.Object
+{
+    constructor()
+    {
+        super();
+
+        this._originalRevision = new WebInspector.SourceCodeRevision(this, null, false);
+        this._currentRevision = this._originalRevision;
+
+        this._sourceMaps = null;
+        this._formatterSourceMap = null;
+        this._requestContentPromise = null;
+    }
+
+    // Public
+
+    get displayName()
+    {
+        // Implemented by subclasses.
+        console.error("Needs to be implemented by a subclass.");
+        return "";
+    }
+
+    get originalRevision()
+    {
+        return this._originalRevision;
+    }
+
+    get currentRevision()
+    {
+        return this._currentRevision;
+    }
+
+    set currentRevision(revision)
+    {
+        console.assert(revision instanceof WebInspector.SourceCodeRevision);
+        if (!(revision instanceof WebInspector.SourceCodeRevision))
+            return;
+
+        console.assert(revision.sourceCode === this);
+        if (revision.sourceCode !== this)
+            return;
+
+        this._currentRevision = revision;
+
+        this.dispatchEventToListeners(WebInspector.SourceCode.Event.ContentDidChange);
+    }
+
+    get content()
+    {
+        return this._currentRevision.content;
+    }
+
+    get url()
+    {
+        // To be overridden by subclasses.
+    }
+
+    get contentIdentifier()
+    {
+        // A contentIdentifier is roughly `url || sourceURL` for cases where
+        // the content is consistent between sessions and not ephemeral.
+
+        // Can be overridden by subclasses if better behavior is possible.
+        return this.url;
+    }
+
+    get sourceMaps()
+    {
+        return this._sourceMaps || [];
+    }
+
+    addSourceMap(sourceMap)
+    {
+        console.assert(sourceMap instanceof WebInspector.SourceMap);
+
+        if (!this._sourceMaps)
+            this._sourceMaps = [];
+
+        this._sourceMaps.push(sourceMap);
+
+        this.dispatchEventToListeners(WebInspector.SourceCode.Event.SourceMapAdded);
+    }
+
+    get formatterSourceMap()
+    {
+        return this._formatterSourceMap;
+    }
+
+    set formatterSourceMap(formatterSourceMap)
+    {
+        console.assert(this._formatterSourceMap === null || formatterSourceMap === null);
+        console.assert(formatterSourceMap === null || formatterSourceMap instanceof WebInspector.FormatterSourceMap);
+
+        this._formatterSourceMap = formatterSourceMap;
+
+        this.dispatchEventToListeners(WebInspector.SourceCode.Event.FormatterDidChange);
+    }
+
+    requestContent()
+    {
+        this._requestContentPromise = this._requestContentPromise || this.requestContentFromBackend().then(this._processContent.bind(this));
+
+        return this._requestContentPromise;
+    }
+
+    createSourceCodeLocation(lineNumber, columnNumber)
+    {
+        return new WebInspector.SourceCodeLocation(this, lineNumber, columnNumber);
+    }
+
+    createLazySourceCodeLocation(lineNumber, columnNumber)
+    {
+        return new WebInspector.LazySourceCodeLocation(this, lineNumber, columnNumber);
+    }
+
+    createSourceCodeTextRange(textRange)
+    {
+        return new WebInspector.SourceCodeTextRange(this, textRange);
+    }
+
+    // Protected
+
+    revisionContentDidChange(revision)
+    {
+        if (this._ignoreRevisionContentDidChangeEvent)
+            return;
+
+        if (revision !== this._currentRevision)
+            return;
+
+        this.handleCurrentRevisionContentChange();
+
+        this.dispatchEventToListeners(WebInspector.SourceCode.Event.ContentDidChange);
+    }
+
+    handleCurrentRevisionContentChange()
+    {
+        // Implemented by subclasses if needed.
+    }
+
+    get revisionForRequestedContent()
+    {
+        // Implemented by subclasses if needed.
+        return this._originalRevision;
+    }
+
+    markContentAsStale()
+    {
+        this._requestContentPromise = null;
+        this._contentReceived = false;
+    }
+
+    requestContentFromBackend()
+    {
+        // Implemented by subclasses.
+        console.error("Needs to be implemented by a subclass.");
+        return Promise.reject(new Error("Needs to be implemented by a subclass."));
+    }
+
+    get mimeType()
+    {
+        // Implemented by subclasses.
+        console.error("Needs to be implemented by a subclass.");
+    }
+
+    // Private
+
+    _processContent(parameters)
+    {
+        // Different backend APIs return one of `content, `body`, `text`, or `scriptSource`.
+        var content = parameters.content || parameters.body || parameters.text || parameters.scriptSource;
+        var error = parameters.error;
+        if (parameters.base64Encoded)
+            content = decodeBase64ToBlob(content, this.mimeType);
+
+        var revision = this.revisionForRequestedContent;
+
+        this._ignoreRevisionContentDidChangeEvent = true;
+        revision.content = content || null;
+        this._ignoreRevisionContentDidChangeEvent = false;
+
+        // FIXME: Returning the content in this promise is misleading. It may not be current content
+        // now, and it may become out-dated later on. We should drop content from this promise
+        // and require clients to ask for the current contents from the sourceCode in the result.
+
+        return Promise.resolve({
+            error,
+            sourceCode: this,
+            content,
+        });
+    }
+};
+
+WebInspector.SourceCode.Event = {
+    ContentDidChange: "source-code-content-did-change",
+    SourceMapAdded: "source-code-source-map-added",
+    FormatterDidChange: "source-code-formatter-did-change",
+    LoadingDidFinish: "source-code-loading-did-finish",
+    LoadingDidFail: "source-code-loading-did-fail"
+};