540433 - Remove nsIDocumentViewer

Status: RESOLVED FIXED

Description

[Olli Pettay [:smaug]]

I think we could merge nsIDocumentViewer and nsIContentViewer
together.
Most common case to use nsIDocumentViewer is to get nsIDocument from it, 
but nsIContentViewer has already attribute DOMDocument.
For performance reasons I'd add [noscript,notxpcom] nsIDocumentPtr getDocument();
to nsIContenViewer and remove NS_IMETHOD GetDocument(nsIDocument** aResult)
from nsIDocumentViewer.

After that removing the remaining methods GetPresShell(nsIPresShell** aResult)
GetPresContext(nsPresContext** aResult) should be easy.

(Noticed this all while profiling nsDocShell::GetChannelIsUnsafe)

Any objections? Suggestions?

Comment 1

[Boris Zbarsky [:bzbarsky, bz on IRC]]

I'm all in favor of reducing the number of interfaces dealing with this stuff.  I think the theory was that we could have non-document viewers (e.g. for plug-ins or images PDFs or whatnot), but I think that's a silly theory.  We should just keep using synthetic documents.

Comment 2

[Robert O'Callahan (:roc) (email my personal email if necessary)]

Absolutely. Let's do it!

Comment 3

[:Ms2ger (he/him; ⌚ UTC+1/+2)]

Attachment: Patch v1

Comment 4

[:Ms2ger (he/him; ⌚ UTC+1/+2)]

I should probably rename NS_NewDocumentViewer as well, and I'll rev the iid.

Comment 5

[Olli Pettay [:smaug]]

Comment on attachment 566602 [details] [diff] [review]
Patch v1


>-NS_NewDocumentViewer(nsIDocumentViewer** aResult);
>+NS_NewDocumentViewer(nsIContentViewer** aResult);
Rename the method.


> MAKE_CTOR(CreateNameSpaceManager,         nsINameSpaceManager,         NS_GetNameSpaceManager)
>-MAKE_CTOR(CreateDocumentViewer,           nsIDocumentViewer,           NS_NewDocumentViewer)
>+MAKE_CTOR(CreateDocumentViewer,           nsIContentViewer,            NS_NewDocumentViewer)
CreateContentViewer   ... NS_NewContentViewer



>     if (mIsCreatingPrintPreview) {
>-      nsCOMPtr<nsIDocumentViewer> dv = do_QueryInterface(mDocViewerPrint);
>-      if (dv) {
>-        parentView = dv->FindContainerView();
>+      nsCOMPtr<nsIContentViewer> cv = do_QueryInterface(mDocViewerPrint);
>+      if (cv) {
>+        parentView = cv->FindContainerView();
>       }
Could you file a followup to rename mDocViewerPrint and nsIDocumentViewerPrint
(if I haven't filed that already)

Comment 6

[:Ms2ger (he/him; ⌚ UTC+1/+2)]

https://hg.mozilla.org/mozilla-central/rev/e915987a1cda

Comment 7

[Takanori MATSUURA]

The fix has been checked in by http://hg.mozilla.org/mozilla-central/rev/e915987a1cda

However nsIDocumentViewer.h is required by following files in comm-central.
/mailnews/base/src/nsMsgPrintEngine.cpp
/mailnews/base/src/nsMsgStatusFeedback.cpp

Comment 8

[Eric Shepherd [:sheppy]]

This is mentioned on Firefox 10 for developers. In addition, I've added this new article:

https://developer.mozilla.org/en/XPCOM_Interface_Reference/nsIContentViewer

Neither nsIContentViewer nor nsIDocumentViewer had documentation previously.

That article is not complete but is a start. If anyone wants to fill out the rest, awesome. But for the purposes of this particular bug, it's done.