defmodule Desktop.Fallback do
require Logger
alias Desktop.{Wx, OS}
@moduledoc """
Fallback handles version differences in the :wx modules needed for showing the
WebView and Desktop notifications and it uses the highest available
feature level while trying to stays backwards compatible to older :wx versions.
"""
def webview_new(frame) do
if is_module?(:wxWebView) do
sizer = :wxFrame.getSizer(frame)
:wxSizer.clear(sizer, delete_windows: true)
webview =
if OS.type() == Windows do
if call(:wxWebView, :isBackendAvailable, ['wxWebViewEdge']) do
call(:wxWebView, :new, [frame, -1, [backend: 'wxWebViewEdge']])
|> configure_webview()
else
Logger.warning("""
Missing support for wxWebViewEdge.
Check your OTP install for edge support and download it here:
https://go.microsoft.com/fwlink/p/?LinkId=2124703
""")
win = :wxHtmlWindow.new(frame, [])
:wxHtmlWindow.setPage(win, """
<html>
<body>
<h1>Missing Edge Runtime</h1>
<p>This demo requires the edge runtime to be installed</p>
<p>Please download it <a href="https://go.microsoft.com/fwlink/p/?LinkId=2124703">here</a> and try again</p>
<p>
<a href="https://go.microsoft.com/fwlink/p/?LinkId=2124703">https://go.microsoft.com/fwlink/p/?LinkId=2124703</a>
</p>
</body>
</html>
""")
:wxHtmlWindow.connect(win, :command_html_link_clicked, skip: true)
win
end
else
call(:wxWebView, :new, [frame, -1])
|> configure_webview()
end
:wxBoxSizer.add(sizer, webview, proportion: 1, flag: Wx.wxEXPAND())
:wxSizer.layout(sizer)
:wxSizer.show(sizer, true)
:wxFrame.refresh(frame)
webview
else
Logger.warning(
"Missing support for wxWebView - upgrade to OTP/24. Will show OS browser instead"
)
end
end
defp configure_webview(webview) do
call(:wxWebView, :connect, [webview, :webview_newwindow])
call(:wxWebView, :enableContextMenu, [webview, [enable: false]])
webview
end
def webview_can_fix(webview) do
is_module?(:wxWebView) and OS.type() == Windows and
call(:wxWebView, :isBackendAvailable, ['wxWebViewEdge']) and
call(:wxWebView, :isShownOnScreen, [webview])
end
def webview_url(%Desktop.Window{webview: webview, last_url: last_url}) do
if webview?() do
call(:wxWebView, :getCurrentURL, [webview])
else
last_url
end
end
def webview_show(
%Desktop.Window{webview: webview, frame: frame, last_url: last},
url,
only_open
) do
if webview?() do
if last == nil or not only_open do
call(:wxWebView, :loadURL, [webview, url])
end
if :wxTopLevelWindow.isIconized(frame) do
:wxTopLevelWindow.iconize(frame, iconize: false)
end
if not :wxWindow.isShown(frame) do
:wxWindow.show(frame, show: true)
:wxTopLevelWindow.centerOnScreen(frame)
end
OS.raise_frame(frame)
else
:wx_misc.launchDefaultBrowser(url)
end
end
def webview_rebuild(%Desktop.Window{webview: webview, frame: frame, last_url: url}) do
if webview?() do
# url = call(:wxWebView, :getCurrentURL, [webview])
webview = webview_new(frame)
Logger.info("Rebuilding WebView on Windows with url: #{inspect(url)}")
if url != nil do
call(:wxWebView, :loadURL, [webview, url])
end
webview
else
webview
end
end
def notification_new(title, type) do
if is_module?(:wxNotificationMessage) do
flag =
case type do
:info -> Wx.wxICON_INFORMATION()
:warning -> Wx.wxICON_WARNING()
:error -> Wx.wxICON_ERROR()
end
notification = call(:wxNotificationMessage, :new, [title, [flags: flag]])
if notification_events_available?() do
for event <- [
:notification_message_click,
:notification_message_dismissed,
:notification_message_action
] do
call(:wxNotificationMessage, :connect, [notification, event])
end
else
Logger.warning(
"Missing support for wxNotificationMessage Events - upgrade to wxWidgets 3.1 - messages won't be clickable"
)
end
notification
else
Logger.warning(
"Missing support for wxNotificationMessage - upgrade to OTP/24. Messages will be logged only"
)
end
end
def notification_show(notification, message, timeout, title \\ nil) do
if is_module?(:wxNotificationMessage) do
if title != nil do
call(:wxNotificationMessage, :setTitle, [notification, to_charlist(title)])
end
call(:wxNotificationMessage, :setMessage, [notification, to_charlist(message)])
call(:wxNotificationMessage, :show, [notification, [timeout: timeout]])
else
Logger.notice("NOTIFICATION: #{title}: #{message}")
end
end
def wx_subscribe() do
call(:wx, :subscribe_events)
end
defp is_module?(module) do
Code.ensure_compiled(module) == {:module, module}
end
defp notification_events_available?() do
{Wx.wxMAJOR_VERSION(), Wx.wxMINOR_VERSION(), Wx.wxRELEASE_NUMBER()}
|> case do
{major, minor, _} when major >= 3 and minor >= 1 -> true
_ -> false
end
end
defp call(module, method, args \\ []) do
if Kernel.function_exported?(module, method, length(args)) do
apply(module, method, args)
end
end
defp webview?() do
is_module?(:wxWebView) and
(OS.type() != Windows or call(:wxWebView, :isBackendAvailable, ['wxWebViewEdge']))
end
end