DevTools: [CSS] Add CSS.editRangeInStyleSheetText() to the protocol

Source/core/inspector/InspectorCSSAgent.cpp

Index: Source/core/inspector/InspectorCSSAgent.cpp
diff --git a/Source/core/inspector/InspectorCSSAgent.cpp b/Source/core/inspector/InspectorCSSAgent.cpp
index 8512f7f46f3fc47e5d83c3c26ca8551779f63815..a5479574cf7fc10169f63992663bd3f2a344a620 100644
--- a/Source/core/inspector/InspectorCSSAgent.cpp
+++ b/Source/core/inspector/InspectorCSSAgent.cpp
@@ -828,7 +828,7 @@ void InspectorCSSAgent::setStyleSheetText(ErrorString* errorString, const String
 {
     InspectorStyleSheet* inspectorStyleSheet = assertStyleSheetForId(errorString, styleSheetId);
     if (!inspectorStyleSheet) {
-        *errorString = "Style sheet with id " + styleSheetId + " not found.";
+        *errorString = "Style sheet with id " + styleSheetId + " not found";
         return;
     }
 
@@ -837,6 +837,57 @@ void InspectorCSSAgent::setStyleSheetText(ErrorString* errorString, const String
     *errorString = InspectorDOMAgent::toErrorString(exceptionState);
 }
 
+void InspectorCSSAgent::editRangeInStyleSheetText(ErrorString* errorString, const String& styleSheetId, const RefPtr<JSONObject>& range, const String& text)
+{
+    InspectorStyleSheet* inspectorStyleSheet = assertStyleSheetForId(errorString, styleSheetId);
+    if (!inspectorStyleSheet) {
+        *errorString = "Style sheet with id " + styleSheetId + " not found";
+        return;
+    }
+    int startLineNumber;
+    int startColumn;
+    int endLineNumber;
+    int endColumn;
+    if (!range->getNumber("startLine", &startLineNumber)) {
+        *errorString = "range.startLine is not an integer value";
+        return;
+    }
+    if (!range->getNumber("startColumn", &startColumn)) {
+        *errorString = "range.startColumn is not an integer value";
+        return;
+    }
+    if (!range->getNumber("endLine", &endLineNumber)) {
+        *errorString = "range.endLine is not an integer value";
+        return;
+    }
+    if (!range->getNumber("endColumn", &endColumn)) {
+        *errorString = "range.endColumn is not an integer value";
+        return;
+    }
+    String oldText;
+    if (!inspectorStyleSheet->getText(&oldText)) {
+        *errorString = "Failed to fetch stylesheet text";
+        return;
+    }
+
+    unsigned startOffset;
+    unsigned endOffset;
+    bool successConvertion = inspectorStyleSheet->lineNumberAndColumnToOffset(startLineNumber, startColumn, &startOffset);
+    successConvertion = successConvertion && inspectorStyleSheet->lineNumberAndColumnToOffset(endLineNumber, endColumn, &endOffset);
+    if (!successConvertion || startOffset > oldText.length() || endOffset > oldText.length()) {
+        *errorString = "Specified range is out of bounds";
+        return;
+    }
+
+    if (startOffset > endOffset) {
+        *errorString = "Range start must preceed its end";
+        return;
+    }
+
+    oldText.replace(startOffset, endOffset - startOffset, text);
+    setStyleSheetText(errorString, styleSheetId, oldText);
+}
+
 void InspectorCSSAgent::setPropertyText(ErrorString* errorString, const RefPtr<JSONObject>& fullStyleId, int propertyIndex, const String& text, bool overwrite, RefPtr<TypeBuilder::CSS::CSSStyle>& result)
 {
     InspectorCSSId compoundId(fullStyleId);