From 387cf24e389854ecc97f6236fdd6acbc2486dd52 Mon Sep 17 00:00:00 2001
From: Akshay Nair <phenax5@gmail.com>
Date: Sat, 15 Mar 2025 19:17:03 +0530
Subject: Replaced QCompleter with custom implementation

---
 src/completion/Completer.cpp | 94 ++++++++++++++++++++++++++++++++------------
 1 file changed, 68 insertions(+), 26 deletions(-)

(limited to 'src/completion/Completer.cpp')

diff --git a/src/completion/Completer.cpp b/src/completion/Completer.cpp
index a38d3f2..27a7b77 100644
--- a/src/completion/Completer.cpp
+++ b/src/completion/Completer.cpp
@@ -1,8 +1,13 @@
 #include <QAbstractItemView>
 #include <QHeaderView>
+#include <QKeyEvent>
 #include <QLineEdit>
 #include <QTreeView>
 #include <QWidget>
+#include <QtCore/qabstractitemmodel.h>
+#include <QtCore/qitemselectionmodel.h>
+#include <QtCore/qnamespace.h>
+#include <QtCore/qsortfilterproxymodel.h>
 #include <QtCore>
 
 #include "completion/Completer.hpp"
@@ -12,33 +17,70 @@ const char *completerStyles = R"(
   background-color: #111;
   color: #fff;
   border-radius: 0;
+  width: 100%;
 )";
 
-Completer::Completer(QObject *parent) : QCompleter(parent) {
-  setFilterMode(Qt::MatchContains);
-  setCaseSensitivity(Qt::CaseInsensitive);
-  setCompletionRole(Qt::DisplayRole);
-  setCompletionMode(QCompleter::PopupCompletion);
-
-  auto treeView = new QTreeView();
-  setPopup(treeView);
-  treeView->setStyleSheet(completerStyles);
-  treeView->setItemDelegate(new CompleterDelegate(treeView));
-  treeView->setRootIsDecorated(false);
-  treeView->setUniformRowHeights(true);
-  treeView->header()->hide();
-  treeView->setColumnWidth(1, 300);
+Completer::Completer() : QWidget() {
+  view = new QTreeView(this);
+  viewDelegate = new CompleterDelegate(view);
+  view->setStyleSheet(completerStyles);
+  view->setItemDelegate(viewDelegate);
+  view->setRootIsDecorated(false);
+  view->setUniformRowHeights(true);
+  view->header()->hide();
+  view->setColumnWidth(1, 500);
+  view->setModel(&proxyModel);
+  view->setFocusPolicy(Qt::NoFocus);
+  view->setEditTriggers(QAbstractItemView::NoEditTriggers);
+  view->setSelectionMode(QAbstractItemView::SingleSelection);
 }
 
-// bool Completer::eventFilter(QObject *watched, QEvent *event) {
-//   auto isFocusIn = event->type() == QEvent::FocusIn;
-//   auto isKeyRelease = event->type() == QEvent::KeyRelease;
-//
-//   QLineEdit *lineEdit = qobject_cast<QLineEdit *>(watched);
-//   bool isInputEmpty = lineEdit && lineEdit->text().isEmpty();
-//
-//   if ((isFocusIn || isKeyRelease) && isInputEmpty)
-//     complete();
-//
-//   return QCompleter::eventFilter(watched, event);
-// }
+void Completer::setSourceModel(QAbstractItemModel *model) {
+  proxyModel.setSourceModel(model);
+}
+
+void Completer::onTextChange(QString text) {
+  proxyModel.setFilterWildcard(text);
+}
+
+void Completer::setHighlightedRow(uint32_t row) {
+  viewDelegate->setCurrentRow(row);
+  view->update();
+}
+
+void Completer::acceptHighlighted() {
+  auto index = proxyModel.index(viewDelegate->currentRow(), 0);
+  auto text = proxyModel.data(index, Qt::DisplayRole).toString();
+  emit accepted(text);
+}
+
+bool Completer::onKeyPressEvent(QKeyEvent *event) {
+  auto combo = event->keyCombination();
+  auto row = viewDelegate->currentRow();
+
+  // If there are no matches, nothing to handle here
+  if (proxyModel.rowCount() == 0)
+    return false;
+
+  if (combo.key() == Qt::Key_Up) {
+    setHighlightedRow(row <= 0 ? proxyModel.rowCount() - 1 : row - 1);
+    return true;
+  }
+
+  if (combo.key() == Qt::Key_Down) {
+    setHighlightedRow((row + 1) % proxyModel.rowCount());
+    return true;
+  }
+
+  if (combo.key() == Qt::Key_Tab) {
+    acceptHighlighted();
+    return true;
+  }
+
+  if (combo.key() == Qt::Key_Return) {
+    acceptHighlighted();
+    return false;
+  }
+
+  return false;
+}
-- 
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