Add auto-incrementing counter placeholder to Find/Replace #3842

[shardt68]

Summary
Adds a #{start,step,pad} counter placeholder to Find/Replace replace strings. During Replace All or Replace/Find, the placeholder expands to an auto-incrementing number with optional zero-padding.

Motivation
Users working with numbered lists, SQL inserts, configuration entries, or test data frequently need sequential numbers across replacements. This currently requires external tools. Other editors (Notepad++, VS Code, IntelliJ) offer similar functionality.

Changes
org.eclipse.jface.text
FindReplaceDocumentAdapterContentProposalProvider: Counter proposal in replace field content assist
RegExMessages.properties: Display string and documentation
org.eclipse.ui.workbench.texteditor
ReplaceCounter (new): Parses #{start,step,pad}, formats with zero-padding, supports negative start/step
FindReplaceLogic: Integrates counter — parses on setReplaceString(), expands in replaceSelection(), resets in replaceAll()
Tests
ReplaceCounterTest: 16 unit tests
FindReplaceLogicTest: 9 integration tests

Syntax
Replace string Result
#{1,1,3} 001, 002, 003, …
#{10,5,0} 10, 15, 20, …
item_#{1,1,2} item_01, item_02, …
$1_#{1,1,2} (regex) Match1_01, Match1_02, …
Fixes #3842

Adds a #{start,step,pad} counter placeholder to Find/Replace replace strings. During Replace All or Replace/Find, the placeholder expands to an auto-incrementing number with optional zero-padding. #3842

[eclipse-eca-validation]

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[eclipse-platform-bot]

This pull request changes some projects for the first time in this development cycle.
Therefore the following files need a version increment:

tests/org.eclipse.ui.workbench.texteditor.tests/META-INF/MANIFEST.MF

An additional commit containing all the necessary changes was pushed to the top of this PR's branch. To obtain these changes (for example if you want to push more changes) either fetch from your fork or apply the git patch.

Git patch

From f7044759e921ed582339bffad50be8b1a94aa683 Mon Sep 17 00:00:00 2001
From: Eclipse Platform Bot <platform-bot@eclipse.org>
Date: Wed, 1 Apr 2026 10:34:05 +0000
Subject: [PATCH] Version bump(s) for 4.40 stream


diff --git a/tests/org.eclipse.ui.workbench.texteditor.tests/META-INF/MANIFEST.MF b/tests/org.eclipse.ui.workbench.texteditor.tests/META-INF/MANIFEST.MF
index c39e7b8fbd..8875927c62 100644
--- a/tests/org.eclipse.ui.workbench.texteditor.tests/META-INF/MANIFEST.MF
+++ b/tests/org.eclipse.ui.workbench.texteditor.tests/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: %Plugin.name
 Bundle-SymbolicName: org.eclipse.ui.workbench.texteditor.tests
-Bundle-Version: 3.15.0.qualifier
+Bundle-Version: 3.15.100.qualifier
 Bundle-Vendor: %Plugin.providerName
 Bundle-Localization: plugin
 Export-Package: 
-- 
2.53.0

Further information are available in Common Build Issues - Missing version increments.

[github-actions]

Test Results

   852 files  ± 0     852 suites  ±0   55m 51s ⏱️ + 5m 58s
 7 899 tests + 9   7 655 ✅ + 8  243 💤 ±0  1 ❌ +1 
20 199 runs  +27  19 542 ✅ +26  656 💤 ±0  1 ❌ +1 

For more details on these failures, see this check.

Results for commit c8970bd. ± Comparison against base commit 0b9521c.