from .common import * from mlx.util import secondaryInstallation from cefpython3 import cefpython import platform import json import time import os import re import _thread import threading import tempfile import traceback import urllib.request, urllib.error, urllib.parse from lxml import etree from io import StringIO import lxml.html #------------------------------------------------------------------------------ ## @package mlx.gui.cef # # Some helper stuff related to the Chrome Embedded Framework #------------------------------------------------------------------------------ # Indicate if we should quit _toQuit = False # The SimBrief handler _simBriefHandler = None #------------------------------------------------------------------------------ SIMBRIEF_PROGRESS_SEARCHING_BROWSER = 1 SIMBRIEF_PROGRESS_LOADING_FORM = 2 SIMBRIEF_PROGRESS_FILLING_FORM = 3 SIMBRIEF_PROGRESS_WAITING_LOGIN = 4 SIMBRIEF_PROGRESS_LOGGING_IN = 5 SIMBRIEF_PROGRESS_WAITING_RESULT = 6 SIMBRIEF_PROGRESS_RETRIEVING_BRIEFING = 7 SIMBRIEF_PROGRESS_DONE = 1000 SIMBRIEF_RESULT_NONE = 0 SIMBRIEF_RESULT_OK = 1 SIMBRIEF_RESULT_ERROR_OTHER = 2 SIMBRIEF_RESULT_ERROR_NO_FORM = 11 SIMBRIEF_RESULT_ERROR_NO_POPUP = 12 SIMBRIEF_RESULT_ERROR_LOGIN_FAILED = 13 #------------------------------------------------------------------------------ class SimBriefHandler(object): """An object to store the state of a SimBrief query.""" _formURL = "http://flare.privatedns.org/mava_simbrief/simbrief_form.html" _querySettings = { 'navlog': True, 'etops': True, 'stepclimbs': True, 'tlr': True, 'notams': True, 'firnot': True, 'maps': 'Simple', }; def __init__(self): """Construct the handler.""" self._browser = None self._plan = None self._getCredentials = None self._getCredentialsCount = 0 self._updateProgressFn = None self._htmlFilePath = None self._lastProgress = SIMBRIEF_PROGRESS_SEARCHING_BROWSER self._timeoutID = None def initialize(self): """Create and initialize the browser used for Simbrief.""" windowInfo = cefpython.WindowInfo() windowInfo.SetAsOffscreen(int(0)) self._browser = \ cefpython.CreateBrowserSync(windowInfo, browserSettings = {}, navigateUrl = SimBriefHandler._formURL) self._browser.SetClientHandler(OffscreenRenderHandler()) self._browser.SetFocus(True) self._browser.SetClientCallback("OnLoadEnd", self._onLoadEnd) bindings = cefpython.JavascriptBindings(bindToFrames=True, bindToPopups=True) bindings.SetFunction("briefingData", self._briefingDataAvailable) bindings.SetFunction("formFilled", self._formFilled) self._browser.SetJavascriptBindings(bindings) def call(self, plan, getCredentials, updateProgress, htmlFilePath): """Call SimBrief with the given plan.""" self._timeoutID = gobject.timeout_add(120*1000, self._timedOut) self._plan = plan self._getCredentials = getCredentials self._getCredentialsCount = 0 self._updateProgressFn = updateProgress self._htmlFilePath = htmlFilePath self._browser.LoadUrl(SimBriefHandler._formURL) self._updateProgress(SIMBRIEF_PROGRESS_LOADING_FORM, SIMBRIEF_RESULT_NONE, None) def _onLoadEnd(self, browser, frame, httpCode): """Called when a page has been loaded in the SimBrief browser.""" url = frame.GetUrl() print("gui.cef.SimBriefHandler._onLoadEnd", httpCode, url) if httpCode>=300: self._updateProgress(self._lastProgress, SIMBRIEF_RESULT_ERROR_OTHER, None) elif url.startswith("http://flare.privatedns.org/mava_simbrief/simbrief_form.html"): if self._plan is None: return self._updateProgress(SIMBRIEF_PROGRESS_FILLING_FORM, SIMBRIEF_RESULT_NONE, None) js = "form=document.getElementById(\"sbapiform\");" for (name, value) in self._plan.items(): js += "form." + name + ".value=\"" + value + "\";" for (name, value) in SimBriefHandler._querySettings.items(): if isinstance(value, bool): js += "form." + name + ".checked=" + \ ("true" if value else "false") + ";" elif isinstance(value, str): js += "form." + name + ".value=\"" + value + "\";" js += "form.submitform.click();" js += "window.formFilled();" frame.ExecuteJavascript(js) elif url.startswith("http://www.simbrief.com/system/login.api.php"): (user, password) = self._getCredentials(self._getCredentialsCount) if user is None or password is None: self._updateProgress(SIMBRIEF_PROGRESS_WAITING_LOGIN, SIMBRIEF_RESULT_ERROR_LOGIN_FAILED, None) return self._getCredentialsCount += 1 js = "form=document.forms[0];" js += "form.user.value=\"" + user + "\";" js += "form.pass.value=\"" + password + "\";" js += "form.submit();" frame.ExecuteJavascript(js) elif url.startswith("http://www.simbrief.com/ofp/ofp.loader.api.php"): self._updateProgress(SIMBRIEF_PROGRESS_WAITING_RESULT, SIMBRIEF_RESULT_NONE, None) elif url.startswith("http://flare.privatedns.org/mava_simbrief/simbrief_briefing.php"): js = "form=document.getElementById(\"hiddenform\");" js += "window.briefingData(form.hidden_is_briefing_available.value, form.hidden_link.value);"; frame.ExecuteJavascript(js) def _formFilled(self): """Called when the form has been filled and submitted.""" self._updateProgress(SIMBRIEF_PROGRESS_WAITING_LOGIN, SIMBRIEF_RESULT_NONE, None) def _briefingDataAvailable(self, available, link): """Called when the briefing data is available.""" if available: link ="http://www.simbrief.com/ofp/flightplans/xml/" + link + ".xml" self._updateProgress(SIMBRIEF_PROGRESS_RETRIEVING_BRIEFING, SIMBRIEF_RESULT_NONE, None) thread = threading.Thread(target = self._getResults, args = (link,)) _thread.daemon = True _thread.start() else: self._updateProgress(SIMBRIEF_PROGRESS_RETRIEVING_BRIEFING, SIMBRIEF_RESULT_ERROR_OTHER, None) def _resultsAvailable(self, flightInfo): """Called from the result retrieval thread when the result is available. It checks for the plan being not None, as we may time out.""" if self._plan is not None: self._updateProgress(SIMBRIEF_PROGRESS_DONE, SIMBRIEF_RESULT_OK, flightInfo) def _updateProgress(self, progress, results, flightInfo): """Update the progress.""" self._lastProgress = progress if results!=SIMBRIEF_RESULT_NONE: gobject.source_remove(self._timeoutID) self._plan = None self._updateProgressFn(progress, results, flightInfo) def _timedOut(self): """Called when the timeout occurs.""" if self._lastProgress==SIMBRIEF_PROGRESS_LOADING_FORM: result = SIMBRIEF_RESULT_ERROR_NO_FORM elif self._lastProgress==SIMBRIEF_PROGRESS_WAITING_LOGIN: result = SIMBRIEF_RESULT_ERROR_NO_POPUP else: result = SIMBRIEF_RESULT_ERROR_OTHER self._updateProgress(self._lastProgress, result, None) return False def _getResults(self, link): """Get the result from the given link.""" availableInfo = {} ## Holds analysis data to be used flightInfo = {} # Obtaining the xml response = urllib.request.urlopen(link) xmlContent = response.read() # Processing xml content = etree.iterparse(StringIO(xmlContent)) for (action, element) in content: # Processing tags that occur multiple times if element.tag == "weather": weatherElementList = list(element) for weatherElement in weatherElementList: flightInfo[weatherElement.tag] = weatherElement.text else: availableInfo[element.tag] = element.text # Processing plan_html ## Obtaining chart links imageLinks = [] for imageLinkElement in lxml.html.find_class(availableInfo["plan_html"], "ofpmaplink"): for imageLink in imageLinkElement.iterlinks(): if imageLink[1] == 'src': imageLinks.append(imageLink[2]) flightInfo["image_links"] = imageLinks print((sorted(availableInfo.keys()))) htmlFilePath = "simbrief_plan.html" if self._htmlFilePath is None \ else self._htmlFilePath with open(htmlFilePath, 'w') as f: f.write(availableInfo["plan_html"]) gobject.idle_add(self._resultsAvailable, flightInfo) #------------------------------------------------------------------------------ def initialize(initializedCallback): """Initialize the Chrome Embedded Framework.""" global _toQuit, _simBriefHandler _toQuit = False gobject.threads_init() _simBriefHandler = SimBriefHandler() _initializeCEF([], initializedCallback) #------------------------------------------------------------------------------ def _initializeCEF(args, initializedCallback): """Perform the actual initialization of CEF using the given arguments.""" print("Initializing CEF with args:", args) settings = { "debug": True, # cefpython debug messages in console and in log_file "log_severity": cefpython.LOGSEVERITY_VERBOSE, # LOGSEVERITY_VERBOSE "log_file": "", # Set to "" to disable "release_dcheck_enabled": True, # Enable only when debugging # This directories must be set on Linux "locales_dir_path": os.path.join(cefpython.GetModuleDirectory(), "locales"), "resources_dir_path": cefpython.GetModuleDirectory(), "browser_subprocess_path": "%s/%s" % \ (cefpython.GetModuleDirectory(), "subprocess"), } switches={} for arg in args: if arg.startswith("--"): if arg != "--enable-logging": assignIndex = arg.find("=") if assignIndex<0: switches[arg[2:]] = "" else: switches[arg[2:assignIndex]] = arg[assignIndex+1:] else: print("Unhandled switch", arg) cefpython.Initialize(settings, switches) gobject.timeout_add(10, _handleTimeout) print("Initialized, executing callback...") initializedCallback() #------------------------------------------------------------------------------ def getContainer(): """Get a container object suitable for running a browser instance within.""" if os.name=="nt": container = gtk.DrawingArea() container.set_property("can-focus", True) container.connect("size-allocate", _handleSizeAllocate) else: container = gtk.DrawingArea() container.show() return container #------------------------------------------------------------------------------ def startInContainer(container, url, browserSettings = {}): """Start a browser instance in the given container with the given URL.""" if os.name=="nt": window = container.get_window() if window is None: print("mlx.gui.cef.startInContainer: no window found!") windowID = None else: windowID = window.handle else: windowID = container.window.xid windowInfo = cefpython.WindowInfo() if windowID is not None: windowInfo.SetAsChild(windowID) return cefpython.CreateBrowserSync(windowInfo, browserSettings = browserSettings, navigateUrl = url) #------------------------------------------------------------------------------ class OffscreenRenderHandler(object): def GetRootScreenRect(self, browser, rect): #print "GetRootScreenRect" rect += [0, 0, 800, 600] return True def GetViewRect(self, browser, rect): #print "GetViewRect" rect += [0, 0, 800, 600] return True def GetScreenPoint(self, browser, viewX, viewY, screenCoordinates): #print "GetScreenPoint", viewX, viewY rect += [viewX, viewY] return True def GetScreenInfo(self, browser, screenInfo): #print "GetScreenInfo" pass def OnPopupShow(self, browser, show): #print "OnPopupShow", show pass def OnPopupSize(self, browser, rect): #print "OnPopupSize", rect pass def OnPaint(self, browser, paintElementType, dirtyRects, buffer, width, height): #print "OnPaint", paintElementType, dirtyRects, buffer, width, height pass def OnCursorChange(self, browser, cursor): #print "OnCursorChange", cursor pass def OnScrollOffsetChanged(self, browser): #print "OnScrollOffsetChange" pass def OnBeforePopup(self, browser, frame, targetURL, targetFrameName, popupFeatures, windowInfo, client, browserSettings, noJavascriptAccess): wInfo = cefpython.WindowInfo() wInfo.SetAsOffscreen(int(0)) windowInfo.append(wInfo) return False #------------------------------------------------------------------------------ def initializeSimBrief(): """Initialize the (hidden) browser window for SimBrief.""" _simBriefHandler.initialize() #------------------------------------------------------------------------------ def callSimBrief(plan, getCredentials, updateProgress, htmlFilePath): """Call SimBrief with the given plan. The callbacks will be called in the main GUI thread.""" _simBriefHandler.call(plan, getCredentials, updateProgress, htmlFilePath) #------------------------------------------------------------------------------ def finalize(): """Finalize the Chrome Embedded Framework.""" global _toQuit _toQuit = True cefpython.Shutdown() #------------------------------------------------------------------------------ def _handleTimeout(): """Handle the timeout by running the CEF message loop.""" if _toQuit: return False else: cefpython.MessageLoopWork() return True #------------------------------------------------------------------------------ def _handleSizeAllocate(widget, sizeAlloc): """Handle the size-allocate event.""" window = widget.get_window() if widget is not None: cefpython.WindowUtils.OnSize(window.handle, 0, 0, 0)