[tor-commits] [tor-browser/tor-browser-68.2.0esr-9.5-1] Bug 1546832 - Adjust letterboxing to take the FindBar and Devtools into account r=johannh

[gk@xxxxxxxxxxxxxx]

commit 8bd51d4e30d4ed1201fab6112ac23f6ddc5858c1
Author: Tom Ritter <tom@xxxxxxxxxxx>
Date:   Fri May 24 07:53:11 2019 +0000

    Bug 1546832 - Adjust letterboxing to take the FindBar and Devtools into account r=johannh
    
    Differential Revision: https://phabricator.services.mozilla.com/D31639
    
    --HG--
    extra : moz-landing-system : lando
---
 browser/actors/RFPHelperChild.jsm                     |  5 +++++
 browser/components/BrowserGlue.jsm                    |  4 ++++
 toolkit/components/resistfingerprinting/RFPHelper.jsm | 11 ++++++++++-
 3 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/browser/actors/RFPHelperChild.jsm b/browser/actors/RFPHelperChild.jsm
index 0658d34ee910..90b675efbc93 100644
--- a/browser/actors/RFPHelperChild.jsm
+++ b/browser/actors/RFPHelperChild.jsm
@@ -27,4 +27,9 @@ class RFPHelperChild extends ActorChild {
       this.mm.sendAsyncMessage("Letterboxing:ContentSizeUpdated");
     }
   }
+  receiveMessage(aMessage) {
+    if (isLetterboxingEnabled) {
+      this.mm.sendAsyncMessage("Letterboxing:ContentSizeUpdated");
+    }
+  }
 }
diff --git a/browser/components/BrowserGlue.jsm b/browser/components/BrowserGlue.jsm
index d22f9512184d..4e851289fbe9 100644
--- a/browser/components/BrowserGlue.jsm
+++ b/browser/components/BrowserGlue.jsm
@@ -268,6 +268,10 @@ let LEGACY_ACTORS = {
       events: {
         resize: {},
       },
+      messages: [
+        "Finder:FindbarOpen",
+        "Finder:FindbarClose",
+      ],
     },
   },
 
diff --git a/toolkit/components/resistfingerprinting/RFPHelper.jsm b/toolkit/components/resistfingerprinting/RFPHelper.jsm
index 772b0259432e..a5d5bed86f98 100644
--- a/toolkit/components/resistfingerprinting/RFPHelper.jsm
+++ b/toolkit/components/resistfingerprinting/RFPHelper.jsm
@@ -406,11 +406,20 @@ class _RFPHelper {
       let containerWidth = browserContainer.clientWidth;
       let containerHeight = browserContainer.clientHeight;
 
+      // If the findbar or devtools are out, we need to subtract their height (plus 1
+      // for the separator) from the container height, because we need to adjust our
+      // letterboxing to acount for it; however it is not included in that dimension
+      // (but rather is subtracted from the content height.)
+      let findBar = browserContainer.getElementsByClassName("findbar-container");
+      let findBarOffset = findBar.length ? findBar[0].clientHeight + 1 : 0;
+      let devtools = browserContainer.getElementsByClassName("devtools-toolbox-bottom-iframe");
+      let devtoolsOffset = devtools.length ? devtools[0].clientHeight + 1 : 0;
+
       return {
         contentWidth,
         contentHeight,
         containerWidth,
-        containerHeight,
+        containerHeight: containerHeight - findBarOffset - devtoolsOffset,
       };
     });
 



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