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Support img tags in HTML label text #58716

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@nyalldawson nyalldawson commented Sep 13, 2024 •
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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

@nyalldawson nyalldawson added Requires Tests! Waiting on the submitter to add unit tests before eligible for merging Labeling Related to QGIS map labeling Needs Documentation When merging a labeled PR, an issue will be created in the Doc repo. Changelog Items that are queued to appear in the visual changelog - remove after harvesting labels Sep 13, 2024
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This pull request has been tagged for the changelog.

  • The description will be harvested so please provide a "nearly-ready" text for the final changelog
  • If possible, add a nice illustration of the feature. Only the first one in the description will be harvested (GIF accepted as well)
  • If you can, it's better to give credits to your sponsor, see below for different formats.

You can edit the description.

Format available for credits
  • Funded by NAME
  • Funded by URL
  • Funded by NAME URL
  • Sponsored by NAME
  • Sponsored by URL
  • Sponsored by NAME URL

Thank you!

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@nyalldawson
This pull request has been tagged as requiring documentation.

A documentation ticket will be opened at https://github.com/qgis/QGIS-Documentation when this PR is merged.

Please update the description (not the comments) with helpful description and screenshot to help the work from documentors.
Also, any commit having [needs-doc] or [Needs Documentation] in will see its message pushed to the issue, so please be as verbose as you can.

Thank you!

@github-actions github-actions bot added this to the 3.40.0 milestone Sep 13, 2024
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github-actions bot commented Sep 13, 2024 •
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🪟 Windows builds ready!

Windows builds of this PR are available for testing here. Debug symbols for this build are available here.

(Built from commit ee94f2d)

@nyalldawson nyalldawson added the Freeze Exempt Feature Freeze exemption granted label Sep 13, 2024
@nyalldawson nyalldawson mentioned this pull request Sep 16, 2024
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@nyalldawson
Allow HTML data urls for QgsImageCache
84b1004 
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
@nyalldawson
Allow QgsTextFragment to represent an inline image object
edcd18f 
Modifies the QgsTextDocument API to extract images from HTML
content, and store in the associated
QgsTextFragment/QgsTextCharacterFormat objects
@nyalldawson
[feature] Support img tags in HTML label text
3d66bb8 
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
@nyalldawson nyalldawson removed the Requires Tests! Waiting on the submitter to add unit tests before eligible for merging label Sep 17, 2024
@qgis qgis deleted a comment from github-actions bot Sep 17, 2024
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