From bb9aa4a561beecc22a842e232ab23572410359b2 Mon Sep 17 00:00:00 2001
From: Tomas Groth <second@tgc.dk>
Date: Fri, 12 Oct 2018 21:51:51 +0200
Subject: [PATCH] Initial support for transparent backgrounds.

---
 openlp/core/display/html/checkerboard.png | Bin 0 -> 2409 bytes
 openlp/core/display/html/display.html     |   2 +-
 openlp/core/display/render.py             |  43 +++++++++++++++-------
 openlp/core/display/window.py             |  19 +++++++++-
 openlp/core/ui/slidecontroller.py         |   2 +-
 5 files changed, 50 insertions(+), 16 deletions(-)
 create mode 100644 openlp/core/display/html/checkerboard.png

diff --git a/openlp/core/display/html/checkerboard.png b/openlp/core/display/html/checkerboard.png
new file mode 100644
index 0000000000000000000000000000000000000000..52b51242feb564a9a0b0ff0171b090dd85953fbd
GIT binary patch
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HcmV?d00001

diff --git a/openlp/core/display/html/display.html b/openlp/core/display/html/display.html
index b4cc918cd..83e0bac90 100644
--- a/openlp/core/display/html/display.html
+++ b/openlp/core/display/html/display.html
@@ -5,7 +5,7 @@
     <link href="reveal.css" rel="stylesheet">
     <style type="text/css">
     body {
-      background: #000 !important;
+      background: transparent !important;
       color: #fff !important;
     }
     sup {
diff --git a/openlp/core/display/render.py b/openlp/core/display/render.py
index a539be319..90f40e4b9 100644
--- a/openlp/core/display/render.py
+++ b/openlp/core/display/render.py
@@ -26,6 +26,7 @@ import html
 import logging
 import math
 import re
+import time
 
 from PyQt5 import QtWidgets
 
@@ -55,7 +56,8 @@ VERSE = 'The Lord said to {r}Noah{/r}: \n' \
     '{r}C{/r}{b}h{/b}{bl}i{/bl}{y}l{/y}{g}d{/g}{pk}' \
     'r{/pk}{o}e{/o}{pp}n{/pp} of the Lord\n'
 VERSE_FOR_LINE_COUNT = '\n'.join(map(str, range(100)))
-FOOTER = ['Arky Arky (Unknown)', 'Public Domain', 'CCLI 123456']
+TITLE = 'Arky Arky (Unknown)'
+FOOTER = ['Public Domain', 'CCLI 123456']
 
 
 def remove_tags(text, can_remove_chords=False):
@@ -465,11 +467,26 @@ class Renderer(RegistryBase, LogMixin, RegistryProperties, DisplayWindow):
         self.force_page = force_page
         if not self.force_page:
             self.set_theme(theme_data)
+            self.theme_height = theme_data.font_main_height
+            slides = self.format_slide(render_tags(VERSE), None)
+            print(slides)
             verses = dict()
-            verses['v1'] = VERSE
-            self.load_verses(verses)
+            verses['title'] = TITLE
+            verses['text'] = slides[0]
+            verses['verse'] = 'V1'
+            self.load_verses([verses])
             self.force_page = False
-            return self.save_screenshot()
+            QtWidgets.QApplication.instance().processEvents()
+            pixmap = self.webview.grab()
+            QtWidgets.QApplication.instance().processEvents()
+            pixmap = self.webview.grab()
+            time.sleep(0.5)
+            self.show()
+            QtWidgets.QApplication.instance().processEvents()
+            pixmap = self.grab()
+            self.hide()
+            pixmap.save('/tmp/screen-grab.png', 'png')
+            return pixmap
         self.force_page = False
         return None
 
@@ -484,21 +501,21 @@ class Renderer(RegistryBase, LogMixin, RegistryProperties, DisplayWindow):
         while not self._is_initialised:
             QtWidgets.QApplication.instance().processEvents()
         self.log_debug('format slide')
-        theme_name = item.theme if item.theme else Registry().get('theme_manager').global_theme
-        theme_data = Registry().get('theme_manager').get_theme_data(theme_name)
-        self.theme_height = theme_data.font_main_height
-
-        # Set theme for preview
-        self.set_theme(theme_data)
+        if item:
+            theme_name = item.theme if item.theme else Registry().get('theme_manager').global_theme
+            theme_data = Registry().get('theme_manager').get_theme_data(theme_name)
+            self.theme_height = theme_data.font_main_height
+            # Set theme for preview
+            self.set_theme(theme_data)
         # Add line endings after each line of text used for bibles.
         line_end = '<br>'
-        if item.is_capable(ItemCapabilities.NoLineBreaks):
+        if item and item.is_capable(ItemCapabilities.NoLineBreaks):
             line_end = ' '
         # Bibles
-        if item.is_capable(ItemCapabilities.CanWordSplit):
+        if item and item.is_capable(ItemCapabilities.CanWordSplit):
             pages = self._paginate_slide_words(text.split('\n'), line_end)
         # Songs and Custom
-        elif item.is_capable(ItemCapabilities.CanSoftBreak):
+        elif item is None or item.is_capable(ItemCapabilities.CanSoftBreak):
             pages = []
             if '[---]' in text:
                 # Remove Overflow split if at start of the text
diff --git a/openlp/core/display/window.py b/openlp/core/display/window.py
index e5411c1f6..cddde2833 100644
--- a/openlp/core/display/window.py
+++ b/openlp/core/display/window.py
@@ -25,6 +25,7 @@ The :mod:`~openlp.core.display.window` module contains the display window
 import json
 import logging
 import os
+import copy
 
 from PyQt5 import QtCore, QtWebChannel, QtWidgets
 
@@ -33,6 +34,7 @@ from openlp.core.common.path import Path, path_to_str
 
 log = logging.getLogger(__name__)
 DISPLAY_PATH = Path(__file__).parent / 'html' / 'display.html'
+CHECKERBOARD_PATH = Path(__file__).parent / 'html' / 'checkerboard.png'
 
 
 class MediaWatcher(QtCore.QObject):
@@ -110,10 +112,14 @@ class DisplayWindow(QtWidgets.QWidget):
         self._is_initialised = False
         self._fbo = None
         self.setWindowFlags(QtCore.Qt.FramelessWindowHint | QtCore.Qt.Tool) #| QtCore.Qt.WindowStaysOnTopHint
+        self.setAttribute(QtCore.Qt.WA_TranslucentBackground);
+        self.setAutoFillBackground(True);
         self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
         self.layout = QtWidgets.QVBoxLayout(self)
         self.layout.setContentsMargins(0, 0, 0, 0)
         self.webview = WebEngineView(self)
+        self.webview.setAttribute(QtCore.Qt.WA_TranslucentBackground);
+        self.webview.page().setBackgroundColor(QtCore.Qt.transparent);
         self.layout.addWidget(self.webview)
         self.webview.loadFinished.connect(self.after_loaded)
         self.set_url(QtCore.QUrl.fromLocalFile(path_to_str(DISPLAY_PATH)))
@@ -121,8 +127,10 @@ class DisplayWindow(QtWidgets.QWidget):
         self.channel = QtWebChannel.QWebChannel(self)
         self.channel.registerObject('mediaWatcher', self.media_watcher)
         self.webview.page().setWebChannel(self.channel)
+        self.is_display = False
         if screen and screen.is_display:
             self.update_from_screen(screen)
+            self.is_display = True
             self.show()
 
     def update_from_screen(self, screen):
@@ -164,6 +172,7 @@ class DisplayWindow(QtWidgets.QWidget):
         :param script: The script to run, a string
         :param is_sync: Run the script synchronously. Defaults to False
         """
+        log.debug(script)
         if not is_sync:
             self.webview.page().runJavaScript(script)
         else:
@@ -280,7 +289,15 @@ class DisplayWindow(QtWidgets.QWidget):
         """
         Set the theme of the display
         """
-        self.run_javascript('Display.setTheme({theme});'.format(theme=theme.export_theme()))
+        # If background is transparent and this is not a display, inject checkerboard background image instead
+        if theme.background_type == 'transparent' and not self.is_display:
+            theme_copy = copy.deepcopy(theme)
+            theme_copy.background_type = 'image'
+            theme_copy.background_filename = CHECKERBOARD_PATH
+            exported_theme = theme_copy.export_theme()
+        else:
+            exported_theme = theme.export_theme()
+        self.run_javascript('Display.setTheme({theme});'.format(theme=exported_theme))
 
     def get_video_types(self):
         """
diff --git a/openlp/core/ui/slidecontroller.py b/openlp/core/ui/slidecontroller.py
index 45057878f..602588f36 100644
--- a/openlp/core/ui/slidecontroller.py
+++ b/openlp/core/ui/slidecontroller.py
@@ -1145,7 +1145,7 @@ class SlideController(QtWidgets.QWidget, LogMixin, RegistryProperties):
                 else:
                     if start:
                         for display in self.displays:
-                            display.load_images([])
+                            display.load_images(self.service_item.slides)
                         # self.display.build_html(self.service_item, to_display)
                     else:
                         for display in self.displays: