From b1196689657a9245732ab5deaf776bdd9961da27 Mon Sep 17 00:00:00 2001
From: Levi Neely <lneely@pascom.net>
Date: Thu, 8 Oct 2026 16:20:29 +0200
Subject: [PATCH] gui: B3-click on word expands to file path (acme-style)

RMB on text without selection now expands to the word at cursor using
acme's isfilec character set: alphanumeric + . - + / : @

This matches acme behavior for clicking on file paths like foo.go:42
---
 kde/gui/ChatBlockDelegate.qml | 64 +++++++++++++++++++++++++++++++----
 kde/gui/ChatPane.qml          | 29 ++++++++++++++--
 2 files changed, 85 insertions(+), 8 deletions(-)

diff --git a/kde/gui/ChatBlockDelegate.qml b/kde/gui/ChatBlockDelegate.qml
index ee34501..86461da 100644
--- a/kde/gui/ChatBlockDelegate.qml
+++ b/kde/gui/ChatBlockDelegate.qml
@@ -250,10 +250,19 @@ Column {
                         }
                         mouse.accepted = true
                     } else if (mouse.button === Qt.RightButton) {
-                        // B3: Plumb selection (no context menu)
+                        // B3: Plumb selection or word under cursor
+                        if (!plumber.available()) {
+                            mouse.accepted = true
+                            return
+                        }
                         var sel = mainTextEdit.selectedText
-                        if (sel && sel.trim() !== "" && plumber.available()) {
+                        if (sel && sel.trim() !== "") {
                             plumber.plumb(sel.trim(), sessionCwd())
+                        } else {
+                            // No selection - expand word at click position (acme-style)
+                            var pos = mainTextEdit.positionAt(mouse.x, mouse.y)
+                            var word = wordAtCursor(mainTextEdit, pos)
+                            if (word) plumber.plumb(word, sessionCwd())
                         }
                         mouse.accepted = true
                     }
@@ -339,6 +348,33 @@ Column {
         return cfg ? (cfg.cwd || "") : ""
     }
 
+    // Expand cursor position to surrounding word/path for plumbing
+    // Matches acme's isfilec: alphanumeric + . - + / : @
+    function wordAtCursor(textEdit, cursorPos) {
+        var text = textEdit.getText(0, textEdit.length)
+        if (cursorPos < 0 || cursorPos > text.length) return ""
+        
+        // isfilec from acme: alphanumeric + . - + / : @
+        function isfilec(ch) {
+            return /[a-zA-Z0-9.\-+\/:@]/.test(ch)
+        }
+        
+        // Find start of word (acme also allows isaddrc chars going left)
+        var start = cursorPos
+        while (start > 0 && isfilec(text.charAt(start - 1))) {
+            start--
+        }
+        
+        // Find end of word
+        var end = cursorPos
+        while (end < text.length && isfilec(text.charAt(end))) {
+            end++
+        }
+        
+        if (start === end) return ""
+        return text.substring(start, end)
+    }
+
     // Text segment component
     Component {
         id: textComponent
@@ -396,10 +432,18 @@ Column {
                         }
                         mouse.accepted = true
                     } else if (mouse.button === Qt.RightButton) {
-                        // B3: Plumb selection (no context menu)
+                        // B3: Plumb selection or word under cursor
+                        if (!plumber.available()) {
+                            mouse.accepted = true
+                            return
+                        }
                         var sel = textEdit.selectedText
-                        if (sel && sel.trim() !== "" && plumber.available()) {
+                        if (sel && sel.trim() !== "") {
                             plumber.plumb(sel.trim(), sessionCwd())
+                        } else {
+                            var pos = textEdit.positionAt(mouse.x, mouse.y)
+                            var word = wordAtCursor(textEdit, pos)
+                            if (word) plumber.plumb(word, sessionCwd())
                         }
                         mouse.accepted = true
                     }
@@ -505,10 +549,18 @@ Column {
                                 if (sel && sel.trim() !== "") executeText(sel)
                                 mouse.accepted = true
                             } else if (mouse.button === Qt.RightButton) {
-                                // B3: Plumb selection (no context menu)
+                                // B3: Plumb selection or word under cursor
+                                if (!plumber.available()) {
+                                    mouse.accepted = true
+                                    return
+                                }
                                 var sel = sourceEdit.selectedText
-                                if (sel && sel.trim() !== "" && plumber.available()) {
+                                if (sel && sel.trim() !== "") {
                                     plumber.plumb(sel.trim(), sessionCwd())
+                                } else {
+                                    var pos = sourceEdit.positionAt(mouse.x, mouse.y)
+                                    var word = wordAtCursor(sourceEdit, pos)
+                                    if (word) plumber.plumb(word, sessionCwd())
                                 }
                                 mouse.accepted = true
                             }
diff --git a/kde/gui/ChatPane.qml b/kde/gui/ChatPane.qml
index 474769d..d0d64a2 100644
--- a/kde/gui/ChatPane.qml
+++ b/kde/gui/ChatPane.qml
@@ -44,6 +44,26 @@ Item {
         return cfg ? (cfg.cwd || "") : ""
     }
 
+    // Expand cursor position to surrounding word/path for plumbing
+    // Matches acme's isfilec: alphanumeric + . - + / : @
+    function wordAtCursor(textEdit, cursorPos) {
+        var text = textEdit.getText(0, textEdit.length)
+        if (cursorPos < 0 || cursorPos > text.length) return ""
+        
+        function isfilec(ch) {
+            return /[a-zA-Z0-9.\-+\/:@]/.test(ch)
+        }
+        
+        var start = cursorPos
+        while (start > 0 && isfilec(text.charAt(start - 1))) start--
+        
+        var end = cursorPos
+        while (end < text.length && isfilec(text.charAt(end))) end++
+        
+        if (start === end) return ""
+        return text.substring(start, end)
+    }
+
     Component.onCompleted: {
         loadChat()
         scrollToBottom()
@@ -503,10 +523,15 @@ Item {
                                     // No selection - ignore
                                 }
                             } else if (mouse.button === Qt.RightButton) {
-                                // B3: Plumb selection (no context menu)
+                                // B3: Plumb selection or word under cursor
+                                if (!plumber.available()) return
                                 var sel = promptInput.selectedText
-                                if (sel && sel.trim() !== "" && plumber.available()) {
+                                if (sel && sel.trim() !== "") {
                                     plumber.plumb(sel.trim(), sessionCwd())
+                                } else {
+                                    var pos = promptInput.positionAt(mouse.x, mouse.y)
+                                    var word = wordAtCursor(promptInput, pos)
+                                    if (word) plumber.plumb(word, sessionCwd())
                                 }
                             }
                         }