[WIP] Rewrite paste and drag/drop broadcasting

[DHowett]

Targets #20155.

I'm opening this to leave some notes.

[DHowett]

Move this to a helper somewhere, not into the nearly 9000-line TerminalPage

[DHowett]

per an internal PR on another feature, just like the clipboard, ENUMERATE the formats and then pick the first one we support. It lets the source app order them in its preferred manner

[DHowett]

the cache is too over-engineered anyway. just eat the cost of enumerating the list of filenames more than once.

[DHowett]

okay the REAL reason that we need to use TerminalPaneContent instead of TermControl as the broadcast medium is that TPC knows the Profile (app layer) and Control doesn't (control layer)

[DHowett]

the two ways I've figured out how to go from Control to Profile are:

• this weak mapping you see here
• enumerate every pane to find the pane whose content's control is the current control (which sounds frankly stupid)

if you have a better way to do this than either of those... plz holler

in my asciicast work, i needed to associate a third thing with each control: the Recorder instance.

[github-actions]

@check-spelling-bot Report

⚠️ Dictionary not found

Problems were encountered retrieving check dictionaries (cspell:ada/dict/ada.txt cspell:css/dict/css.txt cspell:lua/dict/lua.txt cspell:python/src/python/python-lib.txt cspell:cpp/src/people.txt cspell:python/src/additional_words.txt cspell:r/src/r.txt cspell:docker/src/docker-words.txt cspell:haskell/dict/haskell.txt cspell:html/dict/html.txt cspell:software-terms/dict/softwareTerms.txt cspell:rust/dict/rust.txt cspell:python/src/python/python.txt cspell:python/src/common/extra.txt cspell:clojure/src/clojure.txt cspell:latex/dict/latex.txt cspell:cpp/src/ecosystem.txt cspell:redis/dict/redis.txt cspell:typescript/dict/typescript.txt cspell:cpp/src/stdlib-cpp.txt cspell:cpp/src/template-strings.txt cspell:scala/dict/scala.txt cspell:swift/src/swift.txt cspell:java/src/java-terms.txt cspell:node/dict/node.txt cspell:cpp/src/stdlib-c.txt cspell:cpp/src/lang-keywords.txt cspell:cpp/src/compiler-clang-attributes.txt cspell:golang/dict/go.txt cspell:elixir/dict/elixir.txt cspell:sql/src/sql.txt cspell:gaming-terms/dict/gaming-terms.txt cspell:k8s/dict/k8s.txt cspell:sql/src/tsql.txt cspell:public-licenses/src/generated/public-licenses.txt cspell:shell/dict/shell-all-words.txt cspell:monkeyc/src/monkeyc_keywords.txt cspell:cpp/src/compiler-msvc.txt cspell:dotnet/dict/dotnet.txt cspell:django/dict/django.txt cspell:software-terms/dict/webServices.txt cspell:powershell/dict/powershell.txt cspell:public-licenses/src/additional-licenses.txt cspell:svelte/dict/svelte.txt cspell:cpp/src/stdlib-cmath.txt cspell:php/dict/php.txt cspell:cpp/src/compiler-gcc.txt cspell:ruby/dict/ruby.txt cspell:fullstack/dict/fullstack.txt cspell:cpp/src/stdlib-cerrno.txt cspell:dart/src/dart.txt cspell:java/src/java.txt cspell:npm/dict/npm.txt cspell:cpp/src/lang-jargon.txt).

⚠️ For more information, see check-dictionary-not-found.

🔴 Please review

See the 📂 files view, the 📜action log, 👼 SARIF report, or 📝 job summary for details.

Unrecognized words (1)

fuckin

To accept these unrecognized words as correct, you could run the following commands

... in a clone of the git@github.com:microsoft/terminal.git repository
on the dev/duhowett/fhl-2026/rewrite-paste-and-dragdrop-handling-writeinputstring branch (ℹ️ how do I use this?):

curl -s -S -L 'https://raw.githubusercontent.com/check-spelling/check-spelling/cfb6f7e75bbfc89c71eaa30366d0c166f1bd9c8c/apply.pl' |
perl - 'https://github.com/microsoft/terminal/actions/runs/25894745184/attempts/1' &&
git commit -m 'Update check-spelling metadata'

Available 📚 dictionaries could cover words (expected and unrecognized) not in the 📘 dictionary

This includes both expected items (2010) from .github/actions/spelling/expect/alphabet.txt .github/actions/spelling/expect/expect.txt .github/actions/spelling/expect/web.txt and unrecognized words (1)

Dictionary	Entries	Covers	Uniquely
cspell:csharp/csharp.txt	32	2	2
cspell:aws/aws.txt	232	2	2
cspell:fonts/fonts.txt	536	1	1

Consider adding to the extra_dictionaries array (in the .github/actions/spelling/config.json file):

    "cspell:csharp/csharp.txt",
    "cspell:aws/aws.txt",
    "cspell:fonts/fonts.txt",

To stop checking additional dictionaries, put (in the .github/actions/spelling/config.json file):

"check_extra_dictionaries": []

Warnings ⚠️ (1)

See the 📂 files view, the 📜action log, 👼 SARIF report, or 📝 job summary for details.

⚠️ Warnings	Count
⚠️ check-dictionary-not-found	54

See ⚠️ Event descriptions for more information.

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