diff options
| -rw-r--r-- | src/core/web_engine_settings.cpp | 27 | ||||
| -rw-r--r-- | src/webengine/doc/src/qtwebengine-features.qdoc | 17 |
2 files changed, 43 insertions, 1 deletions
diff --git a/src/core/web_engine_settings.cpp b/src/core/web_engine_settings.cpp index 58f0a3e2c..0079e02ba 100644 --- a/src/core/web_engine_settings.cpp +++ b/src/core/web_engine_settings.cpp @@ -48,6 +48,7 @@ #include "content/browser/gpu/gpu_process_host.h" #include "content/public/common/content_switches.h" #include "content/public/common/web_preferences.h" +#include "ui/events/event_switches.h" #include <QFont> #include <QTimer> @@ -97,6 +98,29 @@ static inline bool isTouchScreenAvailable() { return touchScreenAvailable; } +static inline bool isTouchEventsAPIEnabled() { + static bool initialized = false; + static bool touchEventsAPIEnabled = false; + if (!initialized) { + base::CommandLine *parsedCommandLine = base::CommandLine::ForCurrentProcess(); + + // By default the Touch Events API support (presence of 'ontouchstart' in 'window' object) + // will be determined based on the availability of touch screen devices. + const std::string touchEventsSwitchValue = + parsedCommandLine->HasSwitch(switches::kTouchEvents) ? + parsedCommandLine->GetSwitchValueASCII(switches::kTouchEvents) : + switches::kTouchEventsAuto; + + if (touchEventsSwitchValue == switches::kTouchEventsEnabled) + touchEventsAPIEnabled = true; + else if (touchEventsSwitchValue == switches::kTouchEventsAuto) + touchEventsAPIEnabled = isTouchScreenAvailable(); + + initialized = true; + } + return touchEventsAPIEnabled; +} + WebEngineSettings::WebEngineSettings(WebEngineSettings *_parentSettings) : m_adapter(0) @@ -298,7 +322,8 @@ void WebEngineSettings::doApply() void WebEngineSettings::applySettingsToWebPreferences(content::WebPreferences *prefs) { // Override for now - prefs->touch_enabled = isTouchScreenAvailable(); + prefs->touch_enabled = isTouchEventsAPIEnabled(); + prefs->device_supports_touch = isTouchScreenAvailable(); if (prefs->viewport_enabled) { // We should enable viewport and viewport-meta together, but since 5.7 we // no longer have a command-line flag for viewport-meta. diff --git a/src/webengine/doc/src/qtwebengine-features.qdoc b/src/webengine/doc/src/qtwebengine-features.qdoc index 11d3a4ca1..b80ad6a35 100644 --- a/src/webengine/doc/src/qtwebengine-features.qdoc +++ b/src/webengine/doc/src/qtwebengine-features.qdoc @@ -45,6 +45,7 @@ \li \l{Pepper Plugin API} \li \l{Print to PDF} \li \l{Spellchecker} + \li \l{Touch} \li \l{View Source} \li \l{WebRTC} \endlist @@ -312,6 +313,22 @@ Support for this feature was added in Qt 5.8.0. + \section1 Touch + + Qt WebEngine supports touch devices for navigating and interacting with web pages. + + Applications can prohibit the use of touch events in the following ways: + + \list + \li Passing the flag \c --touch-events=disabled on the command line will disable touch event + support in JavaScript API (meaning \c ontouchstart and related handlers will not be present + in the \c document.window object). Touch events will still be delivered to web pages. + + \li Installing an event filter object using \l {QObject::installEventFilter} on the WebEngine + view focus proxy object, and filtering out all touch events. + + \endlist + \section1 View Source Qt WebEngine supports viewing the HTML source of a web page. |