From e0d4d8376a2481f2f5daeaec1c9967e62b0bb8b0 Mon Sep 17 00:00:00 2001
From: aqua <aqua@iserlohn-fortress.net>
Date: Sun, 4 Sep 2022 14:46:52 +0300
Subject: UrlBar: add completer

---
 src/urlbar/completer.cpp | 132 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 132 insertions(+)
 create mode 100644 src/urlbar/completer.cpp

(limited to 'src/urlbar/completer.cpp')

diff --git a/src/urlbar/completer.cpp b/src/urlbar/completer.cpp
new file mode 100644
index 00000000..df864e05
--- /dev/null
+++ b/src/urlbar/completer.cpp
@@ -0,0 +1,132 @@
+/* ============================================================
+ *     The rekonq project
+ * ============================================================
+ * SPDX-License-Identifier: BSD-3-Clause
+ * Copyright (C) 2016 The Qt Company Ltd.
+ * SPDX-License-Identifier: GPL-3.0-only
+ * Copyright (C) 2022 aqua <aqua@iserlohn-fortress.net>
+ * ============================================================ */
+
+#include "completer.hpp"
+#include "urlbar.hpp"
+#include <QHeaderView>
+#include <QKeyEvent>
+#include <QLineEdit>
+#include <QTreeWidget>
+
+static const QString searchUrl{"https://duckduckgo.com/?q=%1"};
+
+// ------------------------------------------------------------------------
+// Ctor and Dtor
+
+UrlSuggester::UrlSuggester(UrlBar *parent) : QObject(parent), m_editor(parent), m_popup(new QTreeWidget)
+{
+  m_popup->setWindowFlags(Qt::Popup);
+  m_popup->setFocusPolicy(Qt::NoFocus);
+  m_popup->setFocusProxy(parent);
+  m_popup->setMouseTracking(true);
+
+  m_popup->setColumnCount(2);
+  m_popup->setUniformRowHeights(true);
+  m_popup->setRootIsDecorated(false);
+  m_popup->setEditTriggers(QTreeWidget::NoEditTriggers);
+  m_popup->setSelectionBehavior(QTreeWidget::SelectRows);
+  m_popup->setFrameStyle(QFrame::Box | QFrame::Plain);
+  m_popup->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+  m_popup->header()->hide();
+
+  m_popup->installEventFilter(this);
+}
+
+UrlSuggester::~UrlSuggester() { delete m_popup; }
+
+bool UrlSuggester::eventFilter(QObject *obj, QEvent *ev)
+{
+  if (obj != m_popup) return false;
+
+  if (ev->type() == QEvent::MouseButtonPress) {
+    m_popup->hide();
+    m_editor->setFocus();
+    return true;
+  }
+
+  if (ev->type() == QEvent::KeyPress) {
+    bool consumed = false;
+    int key = static_cast<QKeyEvent *>(ev)->key();
+    switch (key) {
+    case Qt::Key_Enter:
+    case Qt::Key_Return:
+      doneCompletion();
+      consumed = true;
+      break;
+
+    case Qt::Key_Escape:
+      m_editor->setFocus();
+      m_popup->hide();
+      consumed = true;
+      break;
+
+    case Qt::Key_Up:
+    case Qt::Key_Down:
+    case Qt::Key_Home:
+    case Qt::Key_End:
+    case Qt::Key_PageUp:
+    case Qt::Key_PageDown:
+      break;
+
+    default:
+      m_editor->setFocus();
+      m_editor->event(ev);
+      // m_popup->hide();
+      break;
+    }
+
+    return consumed;
+  }
+
+  return false;
+}
+
+// ------------------------------------------------------------------------
+// slots
+
+void UrlSuggester::showCompletions(const QString &text)
+{
+  if (text.isEmpty()) return;
+
+  m_popup->setUpdatesEnabled(false);
+  m_popup->clear();
+
+  { // go item
+    auto *item = new QTreeWidgetItem(m_popup);
+    item->setIcon(0, QIcon::fromTheme("go-jump"));
+    item->setText(0, tr("Go to %1").arg(text));
+    item->setText(1, QUrl::fromUserInput(text).toString());
+  }
+  { // search item
+    auto *item = new QTreeWidgetItem(m_popup);
+    item->setIcon(0, QIcon::fromTheme("search"));
+    item->setText(0, tr("Search for %1").arg(text));
+    item->setText(1, searchUrl.arg(QUrl::toPercentEncoding(text)));
+  }
+
+  m_popup->setCurrentItem(m_popup->topLevelItem(0));
+  m_popup->resizeColumnToContents(0);
+  m_popup->setUpdatesEnabled(true);
+
+  m_popup->move(m_editor->mapToGlobal(QPoint(0, m_editor->height())));
+  m_popup->resize(m_editor->width(), 250);
+  m_popup->setFocus();
+  m_popup->show();
+}
+
+void UrlSuggester::doneCompletion()
+{
+  m_popup->hide();
+  m_editor->setFocus();
+  auto *item = m_popup->currentItem();
+  if (item) {
+    m_editor->setText(item->text(1));
+    emit m_editor->returnPressed();
+  }
+}
-- 
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