1024834 - Window and document sizes are reported as 0x0 when a packaged app is launched programmatically and display power is turned off.

Status: RESOLVED WONTFIX

(Firefox OS Graveyard :: Gaia::System::Window Mgmt, defect)

Description

[Jukka Jylänki]

1. Connect your FFOS device via USB, make sure ADB and DevTools debugging options are enabled.
2. Run the following commands on the command line:

wget https://raw.githubusercontent.com/kripken/emscripten/incoming/tools/ffdb.py
chmod +x ffdb.py
wget http://clb.demon.fi/bugs/dip.zip
./ffdb.py hide-prompt

3. Wait for the phone to reboot. (note: The above permanently sets the pref devtools.debugger.prompt-connection to false on your phone. Call ffdb.py restore-prompt later to permanently undo this step)

4. Once the phone has rebooted, disable the lock screen from settings.
5. Navigate to home menu, and power off the screen.
6. Run the following command on the command line:

./ffdb.py install dip.zip --run --log

Observed: The log reads

I/@dip.html:10: window.devicePixelRatio: 1.5
E/@dip.html:11: screen.width/height: 320x569
E/@dip.html:12: screen.availWidth/height: 320x569
E/@dip.html:13: window.innerWidth/height: 0x0
E/@dip.html:14: window.outerWidth/height: 0x0
E/@dip.html:15: document.body.clientWidth/height: 0x0
E/@dip.html:16: document.body.offsetWidth/height: 0x0
E/@dip.html:17: document.body.scrollWidth/height: 0x0
E/@dip.html:18: document.documentElement.clientWidth/height: 0x0
E/@dip.html:19: document.documentElement.offsetWidth/height: 0x0
E/@dip.html:20: document.documentElement.scrollWidth/height: 0x0
I/@dip.html:21: document.documentElement.getBoundingClientRect().width/height: 0x0

Expected: The log should read

I/@dip.html:10: window.devicePixelRatio: 1.5
E/@dip.html:11: screen.width/height: 320x569
E/@dip.html:12: screen.availWidth/height: 320x569
E/@dip.html:13: window.innerWidth/height: 320x569
E/@dip.html:14: window.outerWidth/height: 320x569
E/@dip.html:15: document.body.clientWidth/height: 320x569
E/@dip.html:16: document.body.offsetWidth/height: 320x569
E/@dip.html:17: document.body.scrollWidth/height: 320x569
E/@dip.html:18: document.documentElement.clientWidth/height: 320x569
E/@dip.html:19: document.documentElement.offsetWidth/height: 320x569
E/@dip.html:20: document.documentElement.scrollWidth/height: 320x569
I/@dip.html:21: document.documentElement.getBoundingClientRect().width/height: 320x569.3333129882812

Comment 1

[Jukka Jylänki]

While the STR uses ffdb, I checked that the same behavior exists when launching the app with the 'Debug' button interactively in App Manager.

Comment 2

[(inactive after 6/18) Alive Kuo [:alive]]

(In reply to Jukka Jylänki from comment #1)
> While the STR uses ffdb, I checked that the same behavior exists when
> launching the app with the 'Debug' button interactively in App Manager.

I cannot reproduce.
1. Connect to device
2. Screen off
3. Launch a never-being-launched-app
4. Debug the app and type window.innerWidth / screen.width
Both of them are not 0.

Comment 3

[BMO Automation]

Firefox OS is not being worked on