[Webkit-unassigned] [Bug 45271] New: HTML parser should provide script column position within HTML document to JavaScript engine

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=45271

           Summary: HTML parser should provide script column position
                    within HTML document to JavaScript engine
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: HTML DOM
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: peter.rybin at gmail.com
                CC: yurys at chromium.org


WebKit parses HTML and passes all found script texts to JavaScript engine (usually JSC or V8). JavaScript engine also receives line number that corresponds to the start of script source within HTML document.

The engine should also receive column of script start. E.g. in WebCore/bindings/v8/V8Proxy.cpp in method v8::Handle<v8::Script> V8Proxy::compileScript has "baseLine" parameter and lacks "baseColumn" parameter.

The column number is essential for:
- correct column number in error message for one-liner scripts
- correct work of script live editing: if user edited HTML with 2 scripts in one line, there's no way of telling which script must be updated in VM, becuase they both have the same line number.
  E.g. :
    ... onClick="javascript:HandleClick('main')" onFocus="javascript:HandleFocus('main')" ...

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