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repl: add reverse search #31006

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BridgeAR wants to merge 8 commits into from
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repl: add reverse search #31006

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e997e86
repl: fix preview of lines that exceed the terminal columns
BridgeAR Dec 17, 2019
be0fe19
repl: implement reverse search
BridgeAR Dec 16, 2019
4a41ffc
readline: small refactoring
BridgeAR Dec 17, 2019
7f38f0a
readline: set null as callback return in case there's no error
BridgeAR Dec 18, 2019
415d5a1
fixup: repl - fix very long search line
BridgeAR Dec 19, 2019
19ded67
fixup: add big todo comment
BridgeAR Dec 19, 2019
29fcab9
fixup: address comments
BridgeAR Dec 20, 2019
f3387ad
fixup: document the reverse-i-search
BridgeAR Dec 21, 2019
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fixup: add big todo comment
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@BridgeAR
BridgeAR committed Dec 19, 2019
commit 19ded6706a874b9a707d55543f073a679045a41b
21 changes: 21 additions & 0 deletions lib/internal/repl/utils.js
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Expand Up @@ -504,6 +504,27 @@ function setupReverseSearch(repl) {
}

function print(outputLine, inputLine, cursor = repl.cursor) {
// TODO(BridgeAR): Resizing the terminal window breaks this. To fix that,
// readline must be aware of this information. It's probably best to add a
// couple of properties to readline that allow to do the following:
// 1. Add arbitrary data to the end of the current line while not counting
// towards the line. This would be useful for the completion previews.
// 2. Add arbitrary extra lines that do not count towards the regular line.
// This would be useful for both, the input preview and the reverse
// search. It might be combined with the first part?
// 3. Add arbitrary input that is "on top" of the current line. That is
// useful for the reverse search.
// 4. To trigger the line refresh, functions should be used to pass through
// the information.
// The data would then be accounted for when calling `_refreshLine()`.
// This function would then look similar to:
// repl.overlay(outputLine);
// repl.addTrailingLine(inputLine);
// repl.setCursor(cursor);
// More potential improvements: use something similar to stream.cork().
// Multiple cursor moves on the same tick could be prevented in case all
// writes from the same tick are combined and the cursor is moved at the
// tick end instead of after each operation.
let rows = 0;
if (lastMatch !== -1) {
const line = repl.history[lastMatch].slice(0, lastCursor);
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