Closed Bug 120398 Opened 20 years ago Closed 3 years ago
ability to specify 'projection' CSS2 media
Opera automagically switches to the 'projection' CSS2 media when 'full screen' is selected; this is nifty. Would be good to do this automatically, and/or expose it as a preference or 'view' option. http://www.opera.com/support/operashow/ http://people.opera.com/howcome/2000/talks/may19-www9/index.xml
Assignee: asa → dbaron
Status: UNCONFIRMED → NEW
Component: Browser-General → Style System
Ever confirmed: true
QA Contact: doronr → ian
Summary: RFE: ability to specify 'projection' CSS2 media → RFE: ability to specify 'projection' CSS2 media
Yep. However, full screen mode has been removed.
P3/Future, but definitely worth doing if it ever looks like we're going to do full screen mode, since this is close to a de-facto standard for how CSS should work in full screen mode.
Status: NEW → ASSIGNED
OS: Linux → All
Priority: -- → P3
Hardware: PC → All
Target Milestone: --- → Future
We have full screen mode on Windows now.
It may be useful to generalize this, and be able to choose from all supported media. For example, you could have sub menus under 'Use Style' for each medium that contain each named style for that medium. (View->Use Style->projection->style3, or View->Use Style->screen->style1). Just my $0x2/0x64.
Eric Meyer mentioned in his blog that he used this feature of Opera for a presentation at Web Design World: http://www.meyerweb.com/eric/thoughts/2002b.html#t20021125 The actual presentation is here: http://www.meyerweb.com/eric/talks/2002/wdw-boston/meyer-rebuilding.html I would be awesome to support this Mozilla. I actually thought that comment 5 was a duplicate of a more general bug about allowing viewing of basically any media type on screen and print, but I can't find it. The closest I found are some comments in bug 51848 about allowing use of print media style sheets for viewing on screen. See bug 51848 comment 3.
*** Bug 200293 has been marked as a duplicate of this bug. ***
Please don't ignore bug 200293, it has additional suggestions on how to implement this UI-wise.
Hmm.. So we need a scriptable API of some sort to change the current medium of the prescontext, no?
As suggested, I move the relevant content from the earlier reported bug here, sorry for the duplication. Mozilla already have most of the hooks and CSS support required to do this. Step by step, here's what should happen: 1. You load a page which defines media="projection" as the media type for one of its CSSes 2. You switch to fullscreen mode 3. Mozilla applies the CSS with media type "projection" 4. Mozilla makes sure that PageUp/PageDown actually navigates to the page-break-before and page-break-after CSS elements 5. When you return to normal view, Mozilla makes the media="projection" CSS inactive again. In addition I whould propose some enhancements that would help the user experience of this feature: a) Mozilla shows a small "presentation mode" indicator that you can click when there is a CSS with media="projection" defined in the page, which sends you to fullscreen mode. b) Mozilla remaps left/right mouse button to previous/next page respectively in the projection mode, so you can navigate the slides using just the mouse buttons. c) Mozilla hides the scroll bar and address bar in fullscreen mode when the media="projection" style sheet is present.
There are no hooks I'm aware off to switch the media type of a prescontext on the fly, and that's all that we'd need to do here (switch media type and reresolve style).
er, well, that and make "projection" be a paged media mode.
a) With reference to #10 point b. Remapping the mousebuttons would be a really awful usability mistake. Especially remapping the right mousebutton we would lose the context menu and the functionality exposed there. There may be an alternative method of getting the same functionality, but suddenly changing how the system works would be a big leap for some people. b) In addition we should make whether the projection mode is shown a user preference that they can turn on or off for when they are in fullscreen mode (perhaps only losing the buttons and scrollbar if they have it turned on), perhaps somewhere under the navigator tree. I really like the utility of projection (and have been voting for this bug for a while), but sometimes I just want to have a normal scrollable display in fullscreen. c) Related to point a, it should be recognised that the current CSS2 specification specifies projection as a "static" medium <http://www.w3.org/TR/REC-CSS2/media.html#media-groups> however the current working draft of CSS 2.1 specifies projection as "interactive" <http://www.w3.org/TR/CSS21/media.html#media-groups> , a nice 180 degree turn around there then but something people should be aware of. (I personally think it should be "both", because it can be printed, but there you go). d) Printing a HTML/CSS presentation onto OHP's using mozilla, how can you "override" the print media stylesheet (if you have one) with the projection stylesheet. Some kind of style picker on the print preview page might be useful. For example the following drop down menu next to the Landscape/Portrait option,  indicating initial selected style. [Default Print Style] *Alternative print style 1 *Alternative print style 2 -Seperator- *Default Projection Style *Alternative projection style 1
With reference to 13a, the merapping is only supposed to take place if the user clicks the special "presentation mode" button, not by default in fullscreen mode - sorry for being a bit unclear on that. The same applies to hiding scrollbar and URL bar.
Just do as Limi sez, and sweetness + light will prevail :-)
sorry, I half-disagree. I think a "presentation mode" would be good, but it's not related to full-screen. Usually when I go full-screen I don't want presentation mode. Presentation mode should be an additional mode, only available when the presentation css is present.
...which is what I tried to be more specific about in comment #14 :)
what I mean is - I don't expect full-screen to cause my stylesheet to change. For one, I usually go full-screen to read Marvel DotComics (in flash) and I would be *very* annoyed if it switched to presentation mode :-)
...which is why I suggested the presentation button. This is not a discussion forum, can we stop this before it gets silly, Lalo? <wink /> :)
I think what needs to happen is: 1) "Gecko" needs a hook to be able to set the medium of a docshell and/or content viewer, probably so that it can change on the fly. This might be used to set "screen", "projection", "tv", etc. This is relatively easy to do. The external API should probably take a string and then convert the string to an atom for internal storage. 2) Once that happens, someone needs to design and implement UI for a projection mode. I agree that it ought to be possible to go into full screen mode both with or without the medium changing to projection. (A trivial initial implementation might involve a hidden pref, but we'd probably want something better in the end, which may involve installable UI extensions.) Having both a "full screen mode" and "projection mode" on the menu seems a bit excessive to me, but perhaps it isn't.
Maybe I'm a heretic, but this bug seems to have gotten polluted. We went from comment 3: "[Switching to projection CSS in full-screen mode] is close to a de-facto standard for how CSS should work in full screen mode." To comment 20: "...it ought to be possible to go into full screen mode both with or without the medium changing to projection.... Having both a "full screen mode" and "projection mode" on the menu seems a bit excessive to me, but perhaps it isn't." Isn't the UI menu structure polluted enough? Will the average user understand (or care) what distinction we're proposing to draw between "full screen" and "projection"? If supporting projection means creating such complication, let's just leave things alone since the "de facto standard" motivating us to do it isn't how we're planning to actually do it.... Otherwise, I mostly agree with comment 10 (minus adding/subtracting from the UI and remapping the mouse buttons): if you go to full screen mode on a page with projection CSS, switch to the projection CSS. Otherwise, don't.
I strongly object to any heuristics that try to detect whether a page "has projection CSS". What if an author has style rules that should be used when the medium is "screen" but not when it is "projection", and no other differences? In reality, it probably won't make much of a difference, except for web authors who say media="screen" without knowing what they're doing, so perhaps I'd agree that the best solution is just unconditionally to change the medium to projection for full screen mode.
To sum this up a little (it's a pretty old bug, after all): I think, most people here agreed that the presentation mode would be a nice-to-have feature (but don't forget it's a limited audience that reads this bug). However, the point of discussion seems to be how to activate it. Since some people disliked the idea of switching modes automatically (after all, fullscreen mode is a pretty helpful thing, too), I suggest the following: 1) Give it a pref option: do you want presentation mode in full screen ? 2) Let the menu entry depend on the selected option. 3) If there is a presentation mode in the page, make F11 cycle through all three modes (normal/fullscreen/presentation) ignoring the prefs. Otherwise, only switch between normal/fullscreen modes (surprise). That way, there would be a shortcut to both fullscreen and presentation mode (F11) as well as a general preference of the user if she/he actually wants to see the presentation (i.e. no seperate menu entry). The option /might/ also change the order in which fullscreen and presentation mode are shown with F11. Well, anyway, I think the important point here is to provide both fullscreen AND presentation mode to the user and I think, F11 is the right way to go. Something related to comment #13: Wouldn't it be easiest to simply provide the available media types as an additional option in "View->Use Style"? Something like: =========================== * normal (screen) o projection o handheld o ... --------------------------- * basic page style o my style o and another one =========================== It's a more general approach and would also be great for testing web-pages! Stefan
Theer are more related things emerging. For instance Small Screen Rendering: http://disruptive-innovations.com/products/index.html#SSRXPI Projection, Print, Mobile, and others are useful when developing misc tools/sites. For accessability testing it would be great to turn off CSS at all or to emultate Text only browser. Projection is just one of the types ov view with extended functionality (next-slite previous slide, etc.) Probably there should be another bug for that but I'm not sure what place to comment about that.
Summary: RFE: ability to specify 'projection' CSS2 media → ability to specify 'projection' CSS2 media
*** Bug 248723 has been marked as a duplicate of this bug. ***
Another presentation using this feature is available from <URL: http://developer.skolelinux.no/info/prosjektet/20040924-firenze.html >. (Just in case you need another example. :)
Assignee: dbaron → nobody
Status: ASSIGNED → NEW
QA Contact: ian → style-system
I am interested in this feature. It would be great if we can fix it in the next build.
Now that Opera has switched to Blink it no longer does this. Also the modern facilities (media queries) deprecated 'projection'.
Status: NEW → RESOLVED
Closed: 3 years ago
Resolution: --- → WONTFIX
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