[BUG]: Cannot quote/escape search queries

[Aquafina-water-bottle]

Checked for duplicates?

• This issue is not a duplicate

What are the steps to reproduce this bug?

1. Create any card with a field containing a"bc. For example, create a Basic card with Front -> a"bc, and Back -> abc back.
2. Attempt to search for "Front:a\"bc"

Expected behaviour

The card should show in the results screen.

Actual behaviour

The card is not shown in the results screen.

Debug info

AnkiDroid Version = 2.16alpha94

Android Version = 11

Manufacturer = samsung

Model = SM-A705W

Hardware = qcom

Webview User Agent = Mozilla/5.0 (Linux; Android 11; SM-A705W Build/RP1A.200720.012; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/110.0.5481.153 Mobile Safari/537.36

ACRA UUID = 92deb424-7585-4976-afd5-787232deaf81

New schema = false

Scheduler = std2

Crash Reports Enabled = true

DatabaseV2 Enabled = true

(Optional) Anything else you want to share?

• It is true that the search Front:a"bc would work. However, if the field contains a space, i.e. <span class="a">abc</span>, it becomes impossible to search for the exact string with say, "Front:<span class=\"a\">abc</span>".
• The query works on Anki Desktop, so I believe it is expected to work on AnkiDroid as well.
• I didn't test it on the latest stable release, only on the latest alpha release.
• As random workarounds, I tried queries such as "Front:a\\"bc", "Front:a\\\"bc", and `Front:a"bc`. Unfortuately, none of them worked.

Research

• I am reporting a bug specific to AnkiDroid (Android app)
• I have checked the manual and the FAQ and could not find a solution to my issue
• (Optional) I have confirmed the issue is not resolved in the latest alpha release (instructions)

[welcome]

Hello! 👋 Thanks for logging this issue. Please remember we are all volunteers here, so some patience may be required before we can get to the issue. Also remember that the fastest way to get resolution on an issue is to propose a change directly, https://github.com/ankidroid/Anki-Android/wiki/Contributing

[Aquafina-water-bottle]

Looking into the issue, I believe this function has to be reworked to be more similar to Anki's search parser.rs in order to support the functionality. (I believe that's the correct file/function, but I can't really read Rust code unfortunately)

[david-allison]

New schema = false

Have you tried using the Rust backend in the advanced settings?

[Aquafina-water-bottle]

New schema = false

Have you tried using the Rust backend in the advanced settings?

It was as simple as that, thank you so much!