Addon Manager: Replace QtWebEngine with QTextBrowser

Macro display is still a work-in-progress.

src/Mod/AddonManager/addonmanager_readme_viewer.py

@@ -21,6 +21,8 @@
 # *                                                                         *
 # ***************************************************************************
 
+import tempfile
+
 import Addon
 from PySide import QtCore, QtGui, QtWidgets
 
@@ -33,9 +35,9 @@
 
 class ReadmeViewer(QtWidgets.QTextBrowser):
 
-    """ A QTextBrowser widget that, when given an Addon, downloads the README data as appropriate
-     and renders it with whatever technology is available (usually Qt's Markdown renderer for
-     workbenches and its HTML renderer for Macros). """
+    """A QTextBrowser widget that, when given an Addon, downloads the README data as appropriate
+    and renders it with whatever technology is available (usually Qt's Markdown renderer for
+    workbenches and its HTML renderer for Macros)."""
 
     def __init__(self, parent=None):
         super().__init__(parent)
@@ -46,14 +48,17 @@ def __init__(self, parent=None):
         self.repo: Addon.Addon = None
         self.setOpenExternalLinks(True)
         self.setOpenLinks(True)
+        self.image_map = {}
 
     def set_addon(self, repo: Addon):
         self.setPlainText(translate("AddonsInstaller", "Loading README data..."))
+        self.repo = repo
         if self.repo.repo_type == Addon.Addon.Kind.MACRO:
             self.url = self.repo.macro.wiki
+            if not self.url:
+                self.url = self.repo.macro.url
         else:
             self.url = utils.get_readme_url(repo)
-        self.repo = repo
 
         self.request_index = NetworkManager.AM_NETWORK_MANAGER.submit_unmonitored_get(self.url)
 
@@ -63,9 +68,12 @@ def _download_completed(self, index: int, code: int, data: QtCore.QByteArray) ->
             if code == 200:  # HTTP success
                 self._process_package_download(data.data().decode("utf-8"))
             else:
-                self.setPlainText(translate("AddonsInstaller",
-                                            "Failed to download data from {} -- received response code {}.").format(
-                    self.url, code))
+                self.setPlainText(
+                    translate(
+                        "AddonsInstaller",
+                        "Failed to download data from {} -- received response code {}.",
+                    ).format(self.url, code)
+                )
 
     def _process_package_download(self, data: str):
         if self.repo.repo_type == Addon.Addon.Kind.MACRO:
@@ -74,4 +82,33 @@ def _process_package_download(self, data: str):
             if hasattr(self, "setMarkdown"):
                 self.setMarkdown(data)
             else:
-                self.setPlainText(data)
+                self.setPlainText(data)
+
+    def loadResource(self, resource_type: int, name: QtCore.QUrl) -> object:
+        if resource_type == QtGui.QTextDocument.ImageResource:
+            full_url = self._create_full_url(name.toString())
+            if full_url not in self.image_map:
+                self.image_map[full_url] = None
+                fci.Console.PrintMessage(f"Downloading image from {full_url}...\n")
+                data = NetworkManager.AM_NETWORK_MANAGER.blocking_get(full_url)
+                if data and data.data():
+                    image = QtGui.QImage.fromData(data.data())
+                    if image:
+                        self.image_map[full_url] = self._ensure_appropriate_width(image)
+            return self.image_map[full_url]
+        else:
+            return super().loadResource(resource_type, name)
+
+    def _create_full_url(self, url: str) -> str:
+        if url.startswith("http"):
+            return url
+        if not self.url:
+            return url
+        lhs, slash, rhs = self.url.rpartition("/")
+        return lhs + slash + url
+
+    def _ensure_appropriate_width(self, image: QtGui.QImage) -> QtGui.QImage:
+        ninety_seven_percent = self.width() * 0.97
+        if image.width() < ninety_seven_percent:
+            return image
+        return image.scaledToWidth(ninety_seven_percent)