The standards have unfortunatly caused some confusion between the Windows
key and the original Meta key. Try to handle the common case sanely at least.
Makes it easier to understand what happens when a real element isn't
passed as a target to updateVisibility(). Also makes the code more
robust to future changes.
Co-authored-by: Alex Tanskanen <aleta@cendio.se>
Co-authored-by: Niko Lehto <nikle@cendio.se>
In the cursor emulation when deciding if the cursor should be hidden -
Instead of checking what's under the cursor, we check the element that
has capture.
This introduced another bug in the cursor emulation. The cursor did not
always disappear properly when using our cursor emulation together with
our setCapture polyfill. More specifically, we saw a problem when a
capture ended on an element without cursor emulation.
We solved this by introducing another visibility check on a timer in
the cursor emulation. However this led to yet another problem where
this timer conflicted with the timer in the setCapture polyfill.
We removed the timeout in the setCapture polyfill and created a
variable to make sure that all the events remaining in the queue can be
completed.
Co-authored-by: Alex Tanskanen <aleta@cendio.se>
Co-authored-by: Niko Lehto <nikle@cendio.se>
It's not obvious that we want to hide the cursor when we get a leave,
it depends on the element that we're leaving to. This makes the code
more robust.
Co-authored-by: Alex Tanskanen <aleta@cendio.se>
Co-authored-by: Niko Lehto <nikle@cendio.se>
The names of many variables were too similar. To make the code easier
to follow we renamed:
* _captureElem to _capturedElem
* _captureElemChanged() to _capturedElemChanged()
* captureElem to proxyElem
* elem to target
Co-authored-by: Alex Tanskanen <aleta@cendio.se>
Co-authored-by: Niko Lehto <nikle@cendio.se>
Supports both classic cursor type and alpha cursor type. In classic
mode the server can send 'inverted' pixels for the cursor, our code
does not support this but handles these pixels as opaque black.
Co-authored-by: Samuel Mannehed <samuel@cendio.se>
It is not relevant for the connection stage so it should not have
been a constructor argument to begin with. Ship with a warning for
a release before we remove it.
The cursor object is only attached to our canvas whilst connecting,
so we need to make sure we don't try to update anything when were
not connected or we'll get a crash.
When compacting the receive buffer, we should only copy the bytes
between _rQi and _rQlen (the index of the first unread byte, and the
next write position).
Previously, we copied everything for _rQi up untill the end of the
buffer.
Previously, we would compact the buffer (moving unread data to the
start of the buffer) as follows:
- after processing a message, if there are zero unread bytes, just reset
the indices for first and last unread byte to zero
- else, if at least 1/8th of the buffer is used, copy remaining data to the beginning of the buffer
The second option is never actually necessary, as before inserting new data
into the array, we already check if there's enough free space, and
compact the buffer first if necessary. So we've been doing a lot of
copies that weren't actually needed. Let's not do that any more.
The Firefox workaround which checks for missing Alt key events may
synthesise new KeyboardEvents. On these events, checkAlt should not be
recursively triggered. Otherwise, we get "too much recursion" errors
whenever the Alt key is pressed.
These are harmless and really only for debugging. So remove them
as they tend to trick people in to thinking something is wrong.
We already print the entire server pixel format earlier anyway in
case we need the details.
Commit 6e7e6f9 stopped the function from running if width or height was
zero, this commit reverts that change. This commit also makes the
resulting canvas 0x0 if autoscale is called with zero. By adding this
special case we can avoid division by zero in the calculations.
It is not necessary as Websock.flush() is guaranteed to succeed and
give us some space. It also remove the call to _fail(), which was
invalid at this place as clientCutText() is not a method on RFB.
We accidentally removed the code updating the data index in 8a189a6,
resulting in the decoder newer consuming any data. So the data would
be parsed as the next rect, causing weird errors.
Previously scrollbars were disabled on all touch devices. This meant
that they were disabled on Windows when touch was detected. Windows does
in fact have useful scrollbars even in touch mode. Fixes Issue #1172
* Change copyright header
This updates the copyright header to say "The noVNC Authors". People
who previously had copyright listings are now under the AUTHORS file.
With high DPI systems we can end up with a container with a size that
is not an integer number of CSS pixels. Make sure we can handle those
cases by allowing a fractional size for the output canvas. Framebuffer
size and viewport coordinates are still restricted to integer dimensions
though.
Based on initial patch by Alexander E. Patrakov.
Always use the shorthand notation if the function is a method of an object or class `{ foo() { ... } }` or `class bar { foo() { ... } }`
unless it's a callback in which case you a fat arrow function should be used `{ cb: () => { ... } }`
Some browsers don't support custom cursors, and there are cases
where the browsers refuse to show the cursor. Handle both of these
cases by letting the browser render the cursor via a floating
canvas.
This allows us to support a local cursor at all times.
Siemens' touch panels support Tight authentication as well as NOTUNNEL,
but they fail to advertise the latter. Work around this issue by detecting
a Siemens device (through their custom tunnel types) and assume NOTUNNEL
support even if not advertised.
Pasting clipboard texts that were larger than 10240 bytes didnt work and
caused a crash in noVNC. This commit fixes the crash and adds handling
for sending large clipboard texts. Fixes issue #1065.
Firefox no longer sends keyup events properly for the Alt keys. Try
to sniff out the state of the Alt key by monitoring other events that
include its state.
Try to properly detect the fake CtrlL+AltR sequence Windows sends
when pressing AltGr. This allows us to send more accurate key
events over to the server.
Tight PNG rects cannot use the basic compression variants, and PNG
cannot be used in a standard Tight rect.
This is a partial revert of 3e8b26a based on better understanding
of the encoding.
The function removeChild throws an exception when the element specified
doesn't exist. This can happen when opening the websocket throws an
exception during connect. Fixes issue #979
The API allowed strings to be passed from the RFB module to the
application using the disconnect reason. This caused problems since
the application didn't have control over translations for these
strings.
Most of the information being passed using this string was very
technical and not helpful to the end user. One exception to this was
the security result information regarding for example authentication
failures. The protocol allows the VNC server to pass a string
directly to the user in the security result.
So the disconnect reason is replaced by a boolean saying if the
disconnection was clean or not. And for the security result information
from the server, a new event has been added.
Instead of exposing all the internal connection states, the RFB module
will now only send events on connect and on disconnect. This makes it
simpler for the application and gets rid of the double events that were
being sent on disconnect (previously updatestate and disconnect).
An RFB object represents a single connection so it doesn't make
sense to have one without it trying to connect right away. Matches
the behaviour of other APIs, e.g. WebSocket.
Use normal properties with JavaScript setters and getters instead of
our homegrown stuff.
This also changes the properties to follow normal naming conventions.
Sort things by category, and organise everything in the same place.
We don't support reuse of RFB objects so we can safely init everything
in the constructor.
Pierre Ossman
Samuel Mannehed
Niko Lehto
Jesper Alf Dam
Shira Maximov
Juanjo Diaz
Mykola Mokhnach
Solly Ross
Alexander E. Patrakov
Vlastimil Sadilek
Leslie Qi Wang
Juanjo Diaz
Josiah White