Magic-Mirror/gecko-dev
1
0
Fork 0
mirror of https://github.com/mozilla/gecko-dev.git synced 2024-10-17 23:35:34 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Add some documentation on restrictions on callee actions in

Browse Source 
ShouldLoad/ShouldProcess.  Bug 316296, r=biesi, sr=shaver
This commit is contained in:
bzbarsky%mit.edu 2005-11-17 18:17:32 +00:00
parent cbf3b32676
commit 6d2d10784c
1 changed files with 21 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
content/base/public/nsIContentPolicy.idl
View File

@ -176,6 +176,23 @@ interface nsIContentPolicy : nsISupports
* callers to pass extra data to callees.
*
* @return ACCEPT or REJECT_*
*
* @note shouldLoad can be called while the DOM and layout of the document
* involved is in an inconsistent state. This means that implementors of
* this method MUST NOT do any of the following:
* 1) Modify the DOM in any way (e.g. setting attributes is a no-no).
* 2) Query any DOM properties that depend on layout (e.g. offset*
* properties).
* 3) Query any DOM properties that depend on style (e.g. computed style).
* 4) Query any DOM properties that depend on the current state of the DOM
* outside the "context" node (e.g. lengths of node lists).
* 5) [JavaScript implementations only] Access properties of any sort on any
* object without using XPCNativeWrapper (either explicitly or
* implicitly). Due to various DOM0 things, this leads to item 4.
* If you do any of these things in your shouldLoad implementation, expect
* unpredictable behavior, possibly including crashes, content not showing
* up, content showing up doubled, etc. If you need to do any of the things
* above, do them off timeout or event.
*/
short shouldLoad(in unsigned long aContentType,
in nsIURI aContentLocation,
@ -214,6 +231,10 @@ interface nsIContentPolicy : nsISupports
* callers to pass extra data to callees.
*
* @return ACCEPT or REJECT_*
*
* @note shouldProcess can be called while the DOM and layout of the document
* involved is in an inconsistent state. See the note on shouldLoad to see
* what this means for implementors of this method.
*/
short shouldProcess(in unsigned long aContentType,
in nsIURI aContentLocation,