From 0abf3511646446ee64f21d551dd0d2214fd624b7 Mon Sep 17 00:00:00 2001
From: Matt Singleton <matt@xcolour.net>
Date: Wed, 19 Jan 2022 18:58:02 -0600
Subject: organizing the repo a bit

---
 browser/browser.py | 133 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 133 insertions(+)
 create mode 100755 browser/browser.py

(limited to 'browser/browser.py')

diff --git a/browser/browser.py b/browser/browser.py
new file mode 100755
index 0000000..f5475ab
--- /dev/null
+++ b/browser/browser.py
@@ -0,0 +1,133 @@
+#!/usr/bin/env python
+
+import sys
+
+from PySide6 import QtCore, QtWidgets, QtGui, QtWebEngineWidgets, QtWebEngineCore
+
+import gemini
+
+
+class GeminiPage(QtWebEngineCore.QWebEnginePage):
+    def acceptNavigationRequest(self, url, navtype, mainframe):
+        """
+        Block non-gemini page navigation and
+        send the url to the os instead
+        """
+        if url.scheme() == 'gemini':
+            return True
+        else:
+            QtGui.QDesktopServices().openUrl(url)
+            return False
+
+
+class GeminiSchemeHandler(QtWebEngineCore.QWebEngineUrlSchemeHandler):
+    def requestStarted(self, request):
+        request_url = gemini.hack_url(request.requestUrl().toString())
+        print(request_url)
+        gem = gemini.get(request_url)
+        print(gem['status'], gem['meta'])
+        buf = QtCore.QBuffer(parent=request)
+        buf.open(QtCore.QIODevice.WriteOnly)
+        buf.write(gemini.gem2html(gem).encode('utf8'))
+        buf.seek(0)
+        buf.close()
+        request.reply(b'text/html', buf)
+
+
+class GUrlBar(QtWidgets.QLineEdit):
+
+    def __init__(self):
+        QtWidgets.QLineEdit.__init__(self)
+
+    def setUrl(self, url):
+        url = gemini.hack_url(url.toDisplayString())
+        return self.setText(url)
+
+
+class GBrowser(QtWidgets.QMainWindow):
+
+    def __init__(self, initial_url=None, profile=None):
+        if initial_url is None:
+            initial_url = 'gemini://gemini.circumlunar.space/'
+        if profile is None:
+            profile = QtWebEngineCore.QWebEngineProfile.defaultProfile()
+        QtWidgets.QMainWindow.__init__(self)
+
+        # Main Viewport
+        self._browser = QtWebEngineWidgets.QWebEngineView()
+        page = GeminiPage(profile, self._browser)
+        self._browser.setPage(page)
+        self.setCentralWidget(self._browser)
+
+        # Navigation Toolbar
+        back = QtWidgets.QPushButton('←', self)
+        forward = QtWidgets.QPushButton('→', self)
+        self._address = GUrlBar()
+        toolbar = QtWidgets.QToolBar()
+        toolbar.setObjectName('navigationToolbar')
+        toolbar.addWidget(back)
+        toolbar.addWidget(forward)
+        toolbar.addWidget(self._address)
+        self.addToolBar(toolbar)
+
+        # Status Bar
+        request_status = QtWidgets.QLabel()
+        self.statusBar().addWidget(request_status)
+
+        # Connect signals
+        back.clicked.connect(self._browser.back)
+        forward.clicked.connect(self._browser.forward)
+        self._browser.urlChanged.connect(self._address.setUrl)
+        self._address.returnPressed.connect(self.loadAddress)
+        self._browser.page().linkHovered.connect(self.set_status_url)
+
+        self._browser.load(QtCore.QUrl(initial_url))
+
+        settings = QtCore.QSettings("xcolour.net", "GeminiBrowser")
+        self.restoreGeometry(settings.value("geometry"))
+        self.restoreState(settings.value("windowState"))
+        self.setWindowTitle('Gemini Browser')
+        self.show()
+
+        # Shortcuts
+        down_shortcut = QtGui.QShortcut(QtGui.QKeySequence(QtCore.Qt.Key_J), self)
+        down_event = QtGui.QKeyEvent(QtCore.QEvent.KeyPress, QtCore.Qt.Key_Down, QtCore.Qt.NoModifier)
+        down_shortcut.activated.connect(lambda: QtWidgets.QApplication.sendEvent(self._browser.focusProxy(), down_event))
+        up_shortcut = QtGui.QShortcut(QtGui.QKeySequence(QtCore.Qt.Key_K), self)
+        up_event = QtGui.QKeyEvent(QtCore.QEvent.KeyPress, QtCore.Qt.Key_Up, QtCore.Qt.NoModifier)
+        up_shortcut.activated.connect(lambda: QtWidgets.QApplication.sendEvent(self._browser.focusProxy(), up_event))
+        QtGui.QShortcut(QtGui.QKeySequence(QtCore.Qt.Key_H), self, self._browser.back)
+        QtGui.QShortcut(QtGui.QKeySequence(QtCore.Qt.Key_L), self, self._browser.forward)
+        QtGui.QShortcut(QtGui.QKeySequence("Shift+R"), self, self._browser.reload)
+        QtGui.QShortcut(QtGui.QKeySequence("Esc"), self._address, lambda: self.setFocus())
+        QtGui.QShortcut(QtGui.QKeySequence("Shift+L"), self, lambda: self._address.setFocus())
+
+    def set_status_url(self, url):
+        if url:
+            self.statusBar().showMessage(url)
+        else:
+            self.statusBar().clearMessage()
+
+    def closeEvent(self, event):
+        settings = QtCore.QSettings("xcolour.net", "GeminiBrowser")
+        settings.setValue("geometry", self.saveGeometry())
+        settings.setValue("windowState", self.saveState())
+        self._browser.page().deleteLater()
+        super().closeEvent(event)
+
+    def loadAddress(self):
+        self._browser.load(self._address.text())
+        self._browser.setFocus()
+
+
+scheme = QtWebEngineCore.QWebEngineUrlScheme(b'gemini')
+scheme.setDefaultPort(1965)
+scheme.setFlags(QtWebEngineCore.QWebEngineUrlScheme.SecureScheme)
+QtWebEngineCore.QWebEngineUrlScheme.registerScheme(scheme)
+app = QtWidgets.QApplication(sys.argv)
+gem_handler = GeminiSchemeHandler()
+profile = QtWebEngineCore.QWebEngineProfile()
+profile.removeAllUrlSchemeHandlers()
+profile.installUrlSchemeHandler(b'gemini', gem_handler)
+ex = GBrowser(sys.argv[1] if len(sys.argv) > 1 else None, profile)
+sys.exit(app.exec())
-- 
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