Codestin Search App

7576457 · 2026-01-25T20:48:21Z

Description

The flutter_markdown package is officially deprecated and has been replaced by flutter_markdown_plus. In this PR, I updated the old package and also added flutter_markdown_plus_latex.

For the ft.Markdown component, two new attributes are now available:

latex_style: accepts an ft.TextStyle object.
latex_scale_factor: accepts a floating-point number.
Rendering mathematical equations #6066
Rendering of mathematical expressions (Latex, Mathjax) #5499
LaTex rendering in flet #3955

Test Code

import flet as ft

markdown = """
# Flet Markdown & LaTeX Demo

**Markdown rendering** _with_ selectable text and **LaTeX math formulas**.

- [Flet website](https://docs.flet.dev)
- https://github.com/flet-dev/flet

## Styling

Style text as _italic_, __bold__, ~~strikethrough~~, or `inline code`.

- Use bulleted lists
- To better clarify
- Your points

## Math

Inline formula:
$E = mc^2$

Block formula:
$$
P + \\frac{1}{2} \\rho v^2 + \\rho g h = \\text{constant}
$$

$$
\\int_0^1 x^2 , dx = \\frac{1}{3}
$$

"""


def main(page: ft.Page):
    page.scroll = ft.ScrollMode.AUTO
    page.add(
        ft.Markdown(
            value=markdown,
            selectable=True,
            extension_set=ft.MarkdownExtensionSet.GITHUB_WEB,
            code_theme=ft.MarkdownCodeTheme.ATOM_ONE_DARK,
            latex_style=ft.TextStyle(color="purple"),
            latex_scale_factor=1.2,
        )
    )


ft.run(main)

Type of change

Bug fix (non-breaking change which fixes an issue)
New feature (non-breaking change which adds functionality)
Breaking change (fix or feature that would cause existing functionality to not work as expected)
This change requires a documentation update

Checklist

I signed the CLA.
My code follows the style guidelines of this project
I have performed a self-review of my own code
I have commented my code, particularly in hard-to-understand areas
My changes generate no new warnings
New and existing tests pass locally with my changes
I have made corresponding changes to the documentation (if applicable)

Screenshots

Summary by Sourcery

Add LaTeX rendering support to the Markdown control and migrate to the new markdown packages.

New Features:

Enable LaTeX formulas rendering in the Markdown control with configurable text style and scale factor exposed as Markdown properties.

Enhancements:

Replace the deprecated flutter_markdown dependency with flutter_markdown_plus and integrate its LaTeX extension for markdown processing.

packages/flet/lib/src/controls/markdown.dart

FeodorFitsner · 2026-01-26T01:14:58Z

Great PR! Replacing deprecated package and LaTeX support is a great plus.

yunguangli · 2026-01-26T06:00:26Z

Awesome, I have been waiting for LaTex support. An can this LaTex mark down can be integrated with Canvas Text too? It would be great for making educational apps.

7576457 · 2026-01-26T08:45:10Z

Awesome, I have been waiting for LaTex support. An can this LaTex mark down can be integrated with Canvas Text too? It would be great for making educational apps.

You can use ft.Markdown as a component:

math_text = r"$P + \frac{1}{2} \rho v^2 + \rho g h = \text{constant}$"
canvas = cv.Canvas(
    expand=False,
    shapes=[
        cv.Fill(ft.Paint(color=ft.Colors.YELLOW)),
    ],
    content=ft.Column(
        controls=[
            ft.Markdown(math_text),
        ]
    )
)

sourcery-ai

We've reviewed this pull request using the Sourcery rules engine

FeodorFitsner · 2026-01-26T18:30:58Z

@7576457 would you like to add an integration test for Markdown with LaTeX here: sdk/python/packages/flet/integration_tests/controls/material/test_markdown.py?

There is readme on how to run/make-golden-images integration tests: sdk/python/packages/flet/integration_tests/README.md

7576457 · 2026-01-26T18:36:19Z

yes, sure!

FeodorFitsner · 2026-01-26T18:53:08Z

Oh, I haven't realized if you are not on macOS you won't be able to generate "golden" image. We are running integration tests on macOS for now.

OK, you write a test and do a golden image for your platform and I'll upload updated one once PR is merged.

7576457 · 2026-01-26T21:41:28Z

I added the test. Please let me know if something is missing.

I also had trouble running the tests because flet couldn't find flutter. Until I made this change:

(.venv) PS C:\Users\Jesuh\dev\flet\sdk\python> git diff packages/flet/src/flet/testing/flet_test_app.py
diff --git a/sdk/python/packages/flet/src/flet/testing/flet_test_app.py b/sdk/python/packages/flet/src/flet/testing/flet_test_app.py
index 16c6b921..3b41b8e4 100644
--- a/sdk/python/packages/flet/src/flet/testing/flet_test_app.py
+++ b/sdk/python/packages/flet/src/flet/testing/flet_test_app.py
@@ -223,7 +223,7 @@ class FletTestApp:
             stdout = None
             stderr = None
-        flutter_args = ["fvm", "flutter", "test", "integration_test"]
+        flutter_args = ["fvm", "flutter.bat", "test", "integration_test"]
         if self.__disable_fvm:
             flutter_args.pop(0)
(.venv) PS C:\Users\Jesuh\dev\flet\sdk\python>

FeodorFitsner · 2026-01-28T18:20:34Z

In the terminal do you run fvm like fvm flutter.bat as well?

Updated several Flutter dependencies in pubspec.lock, including file_picker, path_provider_foundation, and others. Removed path_provider_foundation from macOS plugin registrant. Added a new golden image for markdown integration tests on macOS.

7576457 · 2026-01-28T18:39:45Z

I didn’t actually try to use FVM. I was just trying to create a golden test and run a test to verify it.

Here’s what I did for that (having pre-set flutter.bat as in the diff):

$env:FLET_TEST_GOLDEN = "1"
$env:FLET_TEST_DISABLE_FVM = "True"
uv run pytest .\packages\flet\integration_tests\controls\material\test_markdown.py

Then I simply ran the test to check that it worked:

$env:FLET_TEST_GOLDEN = "0"
uv run pytest .\packages\flet\integration_tests\controls\material\test_markdown.py

Everything worked fine in this case

FeodorFitsner · 2026-01-28T18:45:00Z

Right, I see. Can you install fvm tool and check if .bat is also required or it should be run as fvm flutter?

FeodorFitsner · 2026-01-28T18:45:48Z

You need fvm anyway as Flutter is progressing fast and we keep it fresh in .fvmrc in the root of repo.

feat: add LaTeX support in Markdown

01b1c35

FeodorFitsner reviewed Jan 26, 2026

View reviewed changes

packages/flet/lib/src/controls/markdown.dart Show resolved Hide resolved

refactor: remove global flet import

fb0fbfc

7576457 marked this pull request as ready for review January 26, 2026 08:58

sourcery-ai bot reviewed Jan 26, 2026

View reviewed changes

FeodorFitsner approved these changes Jan 26, 2026

View reviewed changes

test: add integration test for ft.Markdown

76674d6

ndonkoHenri linked an issue Jan 27, 2026 that may be closed by this pull request

Rendering of mathematical expressions (Latex, Mathjax) #2508

Closed

FeodorFitsner added 2 commits January 28, 2026 10:27

Merge branch 'main' into pr/6069

80407f2

FeodorFitsner approved these changes Jan 29, 2026

View reviewed changes

FeodorFitsner merged commit 61c523d into flet-dev:main Jan 29, 2026
33 of 35 checks passed

Conversation

7576457 commented Jan 25, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Description

Test Code

Type of change

Checklist

Screenshots

Summary by Sourcery

Uh oh!

Uh oh!

FeodorFitsner commented Jan 26, 2026

Uh oh!

yunguangli commented Jan 26, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

7576457 commented Jan 26, 2026

Uh oh!

sourcery-ai bot left a comment

Choose a reason for hiding this comment

Uh oh!

FeodorFitsner commented Jan 26, 2026

Uh oh!

7576457 commented Jan 26, 2026

Uh oh!

FeodorFitsner commented Jan 26, 2026

Uh oh!

7576457 commented Jan 26, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

FeodorFitsner commented Jan 28, 2026

Uh oh!

7576457 commented Jan 28, 2026

Uh oh!

FeodorFitsner commented Jan 28, 2026

Uh oh!

FeodorFitsner commented Jan 28, 2026

Uh oh!

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

3 participants

7576457 commented Jan 25, 2026 •

edited

Loading

yunguangli commented Jan 26, 2026 •

edited

Loading

7576457 commented Jan 26, 2026 •

edited

Loading