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Add basic code action support (elixir-lsp#718)
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61 changes: 61 additions & 0 deletions
61
apps/language_server/lib/language_server/providers/code_action.ex
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Original file line number | Diff line number | Diff line change |
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defmodule ElixirLS.LanguageServer.Providers.CodeAction do | ||
use ElixirLS.LanguageServer.Protocol | ||
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def code_actions(uri, diagnostics) do | ||
actions = | ||
diagnostics | ||
|> Enum.map(fn diagnostic -> actions(uri, diagnostic) end) | ||
|> List.flatten() | ||
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{:ok, actions} | ||
end | ||
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defp actions(uri, %{"message" => message, "range" => range} = diagnostic) do | ||
[ | ||
{~r/variable "(.*)" is unused/, &prefix_with_underscore/2}, | ||
{~r/variable "(.*)" is unused/, &remove_variable/2} | ||
] | ||
|> Enum.filter(fn {r, _fun} -> String.match?(message, r) end) | ||
|> Enum.map(fn {_r, fun} -> fun.(uri, diagnostic) end) | ||
end | ||
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defp prefix_with_underscore(uri, %{"message" => message, "range" => range} = diagnostic) do | ||
%{ | ||
"title" => "Add '_' to unused variable", | ||
"kind" => "quickfix", | ||
"edit" => %{ | ||
"changes" => %{ | ||
uri => [ | ||
%{ | ||
"newText" => "_", | ||
"range" => | ||
range( | ||
range["start"]["line"], | ||
range["start"]["character"], | ||
range["start"]["line"], | ||
range["start"]["character"] | ||
) | ||
} | ||
] | ||
} | ||
} | ||
} | ||
end | ||
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defp remove_variable(uri, %{"range" => range} = diagnostic) do | ||
%{ | ||
"title" => "Remove unused variable", | ||
"kind" => "quickfix", | ||
"edit" => %{ | ||
"changes" => %{ | ||
uri => [ | ||
%{ | ||
"newText" => "", | ||
"range" => range | ||
} | ||
] | ||
} | ||
} | ||
} | ||
end | ||
end |
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