And add to "Advanced Python field calculator" algorithm, as that
algorithm uses the Python exec() function and is a security
risk if run with untrusted/unchecked inputs
Allows use of img tags in HTML label content. The following logic
is applied:
- Image path is set via the src="xxx" attribute. Local, HTTP, and
base64 encoded paths are permitted
- Any image format readable by QGIS can be used
- Image sizes can be specified via the width="##" and height="##"
attributes. If width or height is not specified it will automatically
be calculated from the original image size
- If width or height are specified, they are considered to be
in POINTS
- The css width/height settings are NOT respected (this is a Qt
limitation)
- Images are not supported for curved text labels
- Images are placed inline only, floating images are not supported
Sponsored by City of Freiburg im Breisgau
Adds support for base64 encoded image decoding when the path
is a HTML data URL (in addition to the existing "base64:..."
format support)
Allows use of eg "data:image/jpeg;base64,XXXXXXXX" formats
for image paths, so that the image cache can correctly handle
embedded image paths from HTML/CSS content
* add template method to return specific type of layers in map canvas
* Apply suggestions from code review
Co-authored-by: Matthias Kuhn <matthias@opengis.ch>
---------
Co-authored-by: Matthias Kuhn <matthias@opengis.ch>
Instead of just silently return "0", which is misleading and
can result in data corruption/incorrect analysis results. Better
to be safe and force callers to handle transformation errors
appropriately.
In this case we:
- raise QgsProcessingExceptions when the failed measurement is coming
from a processing tool, so that the user is forced to deal with the
issue and we aren't providing meaningless/misleading measurements
- report evaluation errors if the measurement is coming from a
QGIS expression, so the user must appropriately handle the situation
- for all other cases we currently just write a console error and
maintain the current behavior of treating the measurement length
as 0. TODO notes have been added to handle this cases better.
