Zoom page: Add CLI options --window-size and --zoom-factor

I originally sent ctrl+ to browser to zoom, but the screenshot un-zooms
so I found this method instead.

CHANGES.rst

@@ -5,11 +5,9 @@ grafanimate changelog
 
 in progress
 ===========
-
-2024-12-03 0.8.1
-================
 - Optionally configure Firefox location using ``FIREFOX_BIN``
   environment variable. Thanks, @gogglespisano and @intermittentnrg.
+- Added CLI options ``--window-size`` and ``--zoom-factor``
 
 2024-12-03 0.8.0
 ================

grafanimate/commands.py

@@ -4,6 +4,7 @@
 import logging
 import os
 import typing as t
+from ast import literal_eval
 from pathlib import Path
 
 from docopt import DocoptExit, docopt
@@ -50,6 +51,8 @@ def run():
       --dashboard-uid=<uid>         Grafana dashboard UID.
 
     Layout and scene options:
+      --window-size=<window-size>   Customize window size, e.g. `(1920, 1180)`
+      --zoom-factor=<zoom-factor>   Adjust zoom factor of page. [default: 1.0]
       --use-panel-events            Whether to enable using Grafana's panel events. [default: false]
                                     Caveat: Does not work for "d-solo" panels
 
@@ -155,6 +158,10 @@ def run():
     options["headless"] = asbool(options["headless"])
     if options["use-panel-events"]:
         options["exposure-time"] = 0
+    if options["window-size"]:
+        options["window-size"] = literal_eval(options["window-size"])
+    if options["zoom-factor"]:
+        options["zoom-factor"] = float(options["zoom-factor"])
 
     # Prepare rendering options.
     render_options = RenderingOptions(

grafanimate/core.py

@@ -55,6 +55,8 @@ def make_grafana(
     grafana = GrafanaWrapper(
         baseurl=str(url),
         use_panel_events=options["use-panel-events"],
+        window_size=options["window-size"],
+        zoom_factor=options["zoom-factor"],
     )
     grafana.boot_firefox(headless=headless)
     grafana.boot_grafana()

grafanimate/grafana.py

@@ -25,10 +25,14 @@ def __init__(
         self,
         baseurl: t.Optional[str] = None,
         use_panel_events: bool = True,
+        window_size: t.Optional[tuple[int, int]] = None,
+        zoom_factor: float = 1.0,
         dry_run: bool = False,
     ):
         self.baseurl = baseurl
         self.use_panel_events = use_panel_events
+        self.window_size = window_size
+        self.zoom_factor = zoom_factor
         self.dry_run = dry_run
         log.info("Starting GrafanaWrapper on %s", baseurl)
         FirefoxMarionetteBase.__init__(self)
@@ -38,12 +42,17 @@ def boot_grafana(self):
         Navigate to Grafana application and inject Grafana Sidecar service.
         """
         log.info("Starting Grafana at %s", self.baseurl)
-        self.set_window_size(1920, 1080)
-
+        if self.window_size:
+            self.set_window_size(
+                int(self.window_size[0]),
+                int(self.window_size[1] + (85 * self.zoom_factor)),
+            )
         self.navigate(self.baseurl)
 
         rect = self.get_window_rect()
-        self.marionette.set_window_rect(height=rect["height"], width=rect["width"])
+        self.marionette.set_window_rect(
+            height=int(rect["height"]), width=int(rect["width"])
+        )
 
     def navigate(self, url):
         # Navigate to resource URL.
@@ -52,6 +61,10 @@ def navigate(self, url):
         # Wait for Grafana application to load.
         self.wait_for_grafana()
 
+        # Apply zoom factor to page.
+        if self.zoom_factor:
+            self.marionette.set_pref("layout.css.devPixelsPerPx", str(self.zoom_factor))
+
         # Load Javascript for GrafanaStudio sidecar service.
         jsfiles = ["grafana-util.js", "grafana-studio.js"]
         for jsfile in jsfiles: