libqt5-qtwebengine/QTBUG-81574.patch

From 7d56bbb4c1708f00f729bdfe2e8951c644c83194 Mon Sep 17 00:00:00 2001
From: Kirill Burtsev <kirill.burtsev@qt.io>
Date: Wed, 12 Feb 2020 16:15:34 +0100
Subject: [PATCH] Clear previous page text selection on new navigation unconditionally

Remove code duplication on triggering new url load, and use direct
code to clear SelectedText instead of CollapseSelection as it assumes
focused frame and might be ignored.

Fixes: QTBUG-81574
Change-Id: I01cf02967e118f407c8a3997e176d5b258478a5a
---

diff --git a/src/core/web_contents_adapter.cpp b/src/core/web_contents_adapter.cpp
index 8cc8179..a7579f9 100644
--- a/src/core/web_contents_adapter.cpp
+++ b/src/core/web_contents_adapter.cpp
@@ -67,6 +67,7 @@
 #include "base/task/sequence_manager/thread_controller_with_message_pump_impl.h"
 #include "base/values.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
+#include "content/browser/renderer_host/text_input_manager.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/browser_task_traits.h"
 #include "content/public/browser/child_process_security_policy.h"
@@ -369,6 +370,23 @@
     }
 }
 
+static void Navigate(WebContentsAdapter *adapter, const content::NavigationController::LoadURLParams &params)
+{
+    Q_ASSERT(adapter);
+    adapter->webContents()->GetController().LoadURLWithParams(params);
+    adapter->focusIfNecessary();
+    adapter->resetSelection();
+}
+
+static void NavigateTask(QWeakPointer<WebContentsAdapter> weakAdapter, const content::NavigationController::LoadURLParams &params)
+{
+    DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
+    const auto adapter = weakAdapter.toStrongRef();
+    if (!adapter)
+        return;
+    Navigate(adapter.get(), params);
+}
+
 namespace {
 static QList<WebContentsAdapter *> recursive_guard_loading_adapters;
 
@@ -705,21 +723,12 @@
         }
     }
 
-    auto navigate = [](QWeakPointer<WebContentsAdapter> weakAdapter, const content::NavigationController::LoadURLParams &params) {
-        const auto adapter = weakAdapter.toStrongRef();
-        if (!adapter)
-            return;
-        adapter->webContents()->GetController().LoadURLWithParams(params);
-        adapter->focusIfNecessary();
-    };
-
-    QWeakPointer<WebContentsAdapter> weakThis(sharedFromThis());
     if (resizeNeeded) {
         // Schedule navigation on the event loop.
         base::PostTaskWithTraits(FROM_HERE, {content::BrowserThread::UI},
-                                 base::BindOnce(navigate, std::move(weakThis), std::move(params)));
+                                 base::BindOnce(&NavigateTask, sharedFromThis().toWeakRef(), std::move(params)));
     } else {
-        navigate(std::move(weakThis), params);
+        Navigate(this, params);
     }
 }
 
@@ -752,9 +761,7 @@
     params.can_load_local_resources = true;
     params.transition_type = ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED | ui::PAGE_TRANSITION_FROM_API);
     params.override_user_agent = content::NavigationController::UA_OVERRIDE_TRUE;
-    m_webContents->GetController().LoadURLWithParams(params);
-    focusIfNecessary();
-    m_webContents->CollapseSelection();
+    Navigate(this, params);
 }
 
 void WebContentsAdapter::save(const QString &filePath, int savePageFormat)
@@ -1676,6 +1683,17 @@
     return m_webContents->GetFocusedFrame() != nullptr;
 }
 
+void WebContentsAdapter::resetSelection()
+{
+    CHECK_INITIALIZED();
+    // unconditionally clears the selection in contrast to CollapseSelection, which checks focus state first
+    if (auto rwhv = static_cast<RenderWidgetHostViewQt *>(m_webContents->GetRenderWidgetHostView())) {
+        if (auto mgr = rwhv->GetTextInputManager())
+            if (auto selection = const_cast<content::TextInputManager::TextSelection *>(mgr->GetTextSelection(rwhv)))
+                selection->SetSelection(base::string16(), 0, gfx::Range(), false);
+    }
+}
+
 WebContentsAdapterClient::RenderProcessTerminationStatus
 WebContentsAdapterClient::renderProcessExitStatus(int terminationStatus) {
     auto status = WebContentsAdapterClient::RenderProcessTerminationStatus(-1);
diff --git a/src/core/web_contents_adapter.h b/src/core/web_contents_adapter.h
index 11f8f9c..f8f147f 100644
--- a/src/core/web_contents_adapter.h
+++ b/src/core/web_contents_adapter.h
@@ -229,6 +229,7 @@
     void focusIfNecessary();
     bool isFindTextInProgress() const;
     bool hasFocusedFrame() const;
+    void resetSelection();
 
     // meant to be used within WebEngineCore only
     void initialize(content::SiteInstance *site);
diff --git a/tests/auto/widgets/qwebenginepage/tst_qwebenginepage.cpp b/tests/auto/widgets/qwebenginepage/tst_qwebenginepage.cpp
index 8cdcc9f..94b3f16 100644
--- a/tests/auto/widgets/qwebenginepage/tst_qwebenginepage.cpp
+++ b/tests/auto/widgets/qwebenginepage/tst_qwebenginepage.cpp
@@ -700,7 +700,7 @@
     CursorTrackedPage(QWidget *parent = 0): QWebEnginePage(parent) {
     }
 
-    QString selectedText() {
+    QString jsSelectedText() {
         return evaluateJavaScriptSync(this, "window.getSelection().toString()").toString();
     }
 
@@ -716,42 +716,52 @@
     int isSelectionCollapsed() {
         return evaluateJavaScriptSync(this, "window.getSelection().getRangeAt(0).collapsed").toBool();
     }
-    bool hasSelection()
-    {
-        return !selectedText().isEmpty();
-    }
 };
 
 void tst_QWebEnginePage::textSelection()
 {
-    QWebEngineView view;
-    CursorTrackedPage *page = new CursorTrackedPage(&view);
-    QString content("<html><body><p id=one>The quick brown fox</p>" \
+    CursorTrackedPage page;
+
+    QString textToSelect("The quick brown fox");
+    QString content = QString("<html><body><p id=one>%1</p>" \
         "<p id=two>jumps over the lazy dog</p>" \
-        "<p>May the source<br/>be with you!</p></body></html>");
-    page->setView(&view);
-    QSignalSpy loadSpy(&view, SIGNAL(loadFinished(bool)));
-    page->setHtml(content);
+        "<p>May the source<br/>be with you!</p></body></html>").arg(textToSelect);
+
+    QSignalSpy loadSpy(&page, SIGNAL(loadFinished(bool)));
+    page.setHtml(content);
     QTRY_COMPARE_WITH_TIMEOUT(loadSpy.count(), 1, 20000);
 
     // these actions must exist
-    QVERIFY(page->action(QWebEnginePage::SelectAll) != 0);
+    QVERIFY(page.action(QWebEnginePage::SelectAll) != 0);
 
     // ..but SelectAll is disabled because the page has no focus due to disabled FocusOnNavigationEnabled.
-    QCOMPARE(page->action(QWebEnginePage::SelectAll)->isEnabled(), false);
+    QCOMPARE(page.action(QWebEnginePage::SelectAll)->isEnabled(), false);
 
     // Verify hasSelection returns false since there is no selection yet...
-    QCOMPARE(page->hasSelection(), false);
+    QVERIFY(!page.hasSelection());
+    QVERIFY(page.jsSelectedText().isEmpty());
 
     // this will select the first paragraph
     QString selectScript = "var range = document.createRange(); " \
         "var node = document.getElementById(\"one\"); " \
         "range.selectNode(node); " \
         "getSelection().addRange(range);";
-    evaluateJavaScriptSync(page, selectScript);
-    QCOMPARE(page->selectedText().trimmed(), QString::fromLatin1("The quick brown fox"));
+    evaluateJavaScriptSync(&page, selectScript);
+
     // Make sure hasSelection returns true, since there is selected text now...
-    QCOMPARE(page->hasSelection(), true);
+    QTRY_VERIFY(page.hasSelection());
+    QCOMPARE(page.selectedText().trimmed(), textToSelect);
+
+    QCOMPARE(page.jsSelectedText().trimmed(), textToSelect);
+
+    // navigate away and check that selection is cleared
+    page.load(QUrl("about:blank"));
+    QTRY_COMPARE(loadSpy.count(), 2);
+
+    QVERIFY(!page.hasSelection());
+    QVERIFY(page.selectedText().isEmpty());
+
+    QVERIFY(page.jsSelectedText().isEmpty());
 }