From 6ee8c98d0c28146c2f857d0d56cf05b8d77c73fc Mon Sep 17 00:00:00 2001
From: Jeffy Chen <jeffy.chen@rock-chips.com>
Date: Thu, 7 May 2020 09:12:08 +0800
Subject: [PATCH 07/15] qwaylandwindow: Support setting window flags and attrs

Support setting window flags and attrs through app_id, for example:
app_id = "attrs=alpha:0.5;flags=stay-on-top|stay-on-bottom|no-focus"

Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
---
 src/client/qwaylandwindow.cpp | 60 +++++++++++++++++++++++++++++++++++
 src/client/qwaylandwindow_p.h |  6 ++++
 2 files changed, 66 insertions(+)

diff --git a/src/client/qwaylandwindow.cpp b/src/client/qwaylandwindow.cpp
index d4a1b7e..b83be29 100644
--- a/src/client/qwaylandwindow.cpp
+++ b/src/client/qwaylandwindow.cpp
@@ -121,6 +121,35 @@ void QWaylandWindow::ensureSize()
         mBackingStore->ensureSize();
 }
 
+/* HACK: Set window status through app id */
+void QWaylandWindow::applyWindowStatus()
+{
+    char s[256];
+
+    if (!mShellSurface)
+        return;
+
+    snprintf(s, sizeof(s), "attrs=alpha:%f|", mOpacity);
+
+    strcat(s, ";flags=");
+
+    if (mBlocked)
+        strcat(s, "blocked|");
+    else
+        strcat(s, "-blocked|");
+
+#define SET_FLAG(flag, str) \
+    if (mFlags & (flag)) strcat(s, str "|"); \
+    else strcat(s, "-" str "|");
+
+    SET_FLAG(Qt::WindowStaysOnTopHint, "stay-on-top");
+    SET_FLAG(Qt::WindowStaysOnBottomHint, "stay-on-bottom");
+    SET_FLAG(Qt::WindowDoesNotAcceptFocus, "no-focus");
+    SET_FLAG(Qt::WindowTransparentForInput, "trans-input");
+
+    mShellSurface->setAppId(QLatin1String(s));
+}
+
 void QWaylandWindow::initWindow()
 {
     if (window()->type() == Qt::Desktop)
@@ -459,6 +488,13 @@ void QWaylandWindow::lower()
         mShellSurface->lower();
 }
 
+void QWaylandWindow::setOpacity(qreal level)
+{
+    mOpacity = level;
+
+    applyWindowStatus();
+}
+
 void QWaylandWindow::setMask(const QRegion &mask)
 {
     if (mMask == mask)
@@ -487,6 +523,28 @@ void QWaylandWindow::setMask(const QRegion &mask)
     mSurface->commit();
 }
 
+bool QWaylandWindow::windowEvent(QEvent *event)
+{
+    switch (event->type()) {
+    case QEvent::WindowBlocked:
+        {
+            mBlocked = true;
+            applyWindowStatus();
+        }
+        break;
+    case QEvent::WindowUnblocked:
+        {
+            mBlocked = false;
+            applyWindowStatus();
+        }
+        break;
+    default:
+        break;
+    }
+
+    return QPlatformWindow::windowEvent(event);
+}
+
 void QWaylandWindow::applyConfigureWhenPossible()
 {
     QMutexLocker resizeLocker(&mResizeLock);
@@ -792,6 +850,8 @@ void QWaylandWindow::setWindowFlags(Qt::WindowFlags flags)
 
     mFlags = flags;
     createDecoration();
+
+    applyWindowStatus();
 }
 
 bool QWaylandWindow::createDecoration()
diff --git a/src/client/qwaylandwindow_p.h b/src/client/qwaylandwindow_p.h
index 01337cf..f1a461b 100644
--- a/src/client/qwaylandwindow_p.h
+++ b/src/client/qwaylandwindow_p.h
@@ -152,8 +152,11 @@ public:
     void raise() override;
     void lower() override;
 
+    void setOpacity(qreal level) override;
     void setMask(const QRegion &region) override;
 
+    bool windowEvent(QEvent *event) override;
+
     int scale() const;
     qreal devicePixelRatio() const override;
 
@@ -256,12 +259,14 @@ protected:
     QRegion mMask;
     QRegion mOpaqueArea;
     Qt::WindowStates mLastReportedWindowStates = Qt::WindowNoState;
+    qreal mOpacity = 1.0f;
 
     QWaylandShmBackingStore *mBackingStore = nullptr;
     QWaylandBuffer *mQueuedBuffer = nullptr;
     QRegion mQueuedBufferDamage;
 
 private:
+    void applyWindowStatus();
     void setGeometry_helper(const QRect &rect);
     void initWindow();
     void initializeWlSurface();
@@ -278,6 +283,7 @@ private:
     void handleScreensChanged();
     void sendRecursiveExposeEvent();
 
+    bool mBlocked = false;
     bool mInResizeFromApplyConfigure = false;
     bool lastVisible = false;
     QRect mLastExposeGeometry;
-- 
2.20.1