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refactor: extract ConjugationHandler from GeneralKeyboardIME (Part 12) - #426 - #687

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refactor: extract ConjugationHandler from GeneralKeyboardIME (Part 12) - #426#687
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prince-0408:refactor/extract-conjugation-handler-426

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Description

This PR is Part 12 in modularizing GeneralKeyboardIME for #426.

It extracts verb conjugation state management, conjugation table layout calculation (2x1, 1x3, 3x2, 2x2), capitalization formatting, index boundary validation, and sub-view setup out of GeneralKeyboardIME.kt into a standalone helper class ConjugationHandler.

Detailed Changes Table

File / Component Changes Applied Detailed Impact
ConjugationHandler.kt Created standalone helper encapsulating conjugation state (subsequentAreaRequired, subsequentData, conjugateOutput, conjugateLabels), layout mode saving (saveConjugateModeType), capitalization formatting (applyCapitalizationToConjugations), index validation (getValidatedConjugateIndex), conjugation key press handling (handleConjugateKeys), secondary sub-view setup (setupConjugateSubView), and layout XML selection (getKeyboardLayoutForState). Extracts verb conjugation table formatting, multi-option selection sub-views, and layout grid mode calculations out of GeneralKeyboardIME.kt into a dedicated helper class.
GeneralKeyboardIME.kt Instantiated conjugationHandler and delegated conjugation state properties (subsequentAreaRequired, subsequentData) and helper methods (saveConjugateModeType, applyCapitalizationToConjugations, getValidatedConjugateIndex, returnIsSubsequentRequired, returnSubsequentData, handleConjugateKeys, setupConjugateSubView, getKeyboardLayoutForState). Removed duplicate private helper implementations and unused constants. Fulfills the core goal of #426 by decoupling verb conjugation layout and state management from GeneralKeyboardIME.kt while maintaining 100% backward compatibility for all callers.
ConjugationHandlerTest.kt Added unit tests covering capitalization formatting (applyCapitalizationToConjugations), index boundary clamping (getValidatedConjugateIndex), layout mode saving (saveConjugateModeType), and XML layout selection (getKeyboardLayoutForState). Ensures unit test coverage for verb conjugation helper logic using Robolectric and MockK.
CHANGELOG.md Added entry under ### ♻️ Code Refactoring detailing the extraction of ConjugationHandler from GeneralKeyboardIME. Satisfies ci_changelog_check workflow requirement for pull requests targeting main.

Key Benefits

  • Decoupled Conjugation & Layout Logic: Removes complex grid layout calculations (2x1, 1x3, 3x2, 2x2), verb tense capitalization rules, and multi-option selection sub-views from GeneralKeyboardIME.kt.
  • Improved Testability & Maintainability: Verb conjugation index validation, mode persistence, layout XML selection, and text capitalization can now be tested and maintained independently of IME service lifecycles.

Related Issue

Refactors part of #426

@angrezichatterbox angrezichatterbox added the refactor Refactor code to improve quality label Aug 30, 2026
@andrewtavis

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Would you be able to fix the merge conflicts, @prince-0408? We'd then get to the review :)

@prince-0408
prince-0408 force-pushed the refactor/extract-conjugation-handler-426 branch from 1cd39ae to d2543e8 Compare September 5, 2026 18:39
@andrewtavis andrewtavis added the no-changelog No changelog entry is needed for this pull request label Sep 13, 2026
@prince-0408
prince-0408 force-pushed the refactor/extract-conjugation-handler-426 branch 2 times, most recently from f2a4f9e to 71c7ea3 Compare September 13, 2026 14:23
@andrewtavis

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Thanks for the rebase, @prince-0408! We'll focus on bringing this one in next :)

var subsequentAreaRequired: Boolean = false
var subsequentData: MutableList<List<String>> = mutableListOf()

var conjugateOutput: MutableMap<String, MutableMap<String, Collection<String>>>?

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This only passes through to ime.conjugateOutput, so read it from ime directly and drop the property.

ime.conjugateOutput = value
}

var conjugateLabels: Set<String>

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ConjugateLabels is never used in the handler, so it can be deleted.

) {
val mode =
if (isSubsequent) {
"2x1"

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Sub-view now saves "2x1" here, but it used to save "none". Please keep the original behavior.

if (isSubsequent) {
"2x1"
} else {
when (getLanguageAlias(language).lowercase()) {

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SaveConjugateModeType("none") now resolves to English and saves 2x2, so the idle keyboard gets conjugation key heights

"2x1"
} else {
when (getLanguageAlias(language).lowercase()) {
"es", "it" -> "3x2"

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3x2 has no branch in KeyboardBase, so Spanish and Italian fall through to 3x3 height when they used to get 2x2.

conjugationHandler.subsequentAreaRequired = value
}

internal var subsequentData: MutableList<List<String>>

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Keep it private or remove the wrapper

* Delegated to [ConjugationHandler].
*/
private fun getKeyboardLayoutForState(
internal fun getKeyboardLayoutForState(

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This was private and is now internal ,does anything outside the class use it?

}

@Test
fun saveConjugateModeType_spanishReturns3x2() {

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Please add a test for saveConjugateModeType(none) that expects none


val prefs = context.getSharedPreferences("keyboard_preferences", Context.MODE_PRIVATE)
assertEquals("2x1", prefs.getString("conjugate_mode_type", null))
verify { keyboardView.setKeyLabel("hablo", "HI", KeyboardBase.CODE_1X3_RIGHT) }

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This asserts the LEFT/RIGHT bug, so please update it once line 164 is fixed.

}

@Test
fun returnSubsequentData_and_conjugateLabels() {

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This only checks that values are passed through,please test the behavior instead

@prince-0408
prince-0408 force-pushed the refactor/extract-conjugation-handler-426 branch 2 times, most recently from 6d344f3 to 2af3627 Compare September 14, 2026 10:35
@prince-0408
prince-0408 force-pushed the refactor/extract-conjugation-handler-426 branch from 2af3627 to 949c234 Compare September 14, 2026 10:41
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