From e2649ce7d82c6ab3cef9a96318805f05cead7786 Mon Sep 17 00:00:00 2001
From: Paul Betts <paul@paulbetts.org>
Date: Mon, 21 Nov 2016 14:59:27 -0500
Subject: [PATCH] Add new method to set layout-based zoom level limit

---
 atom/renderer/api/atom_api_web_frame.cc | 5 +++++
 atom/renderer/api/atom_api_web_frame.h  | 1 +
 lib/browser/api/web-contents.js         | 1 +
 lib/renderer/web-view/web-view.js       | 1 +
 4 files changed, 8 insertions(+)

diff --git a/atom/renderer/api/atom_api_web_frame.cc b/atom/renderer/api/atom_api_web_frame.cc
index d4cf54b684a6..d00f2deb3266 100644
--- a/atom/renderer/api/atom_api_web_frame.cc
+++ b/atom/renderer/api/atom_api_web_frame.cc
@@ -92,6 +92,10 @@ void WebFrame::SetZoomLevelLimits(double min_level, double max_level) {
   web_frame_->view()->setDefaultPageScaleLimits(min_level, max_level);
 }
 
+void WebFrame::SetLayoutZoomLevelLimits(double min_level, double max_level) {
+  web_frame_->view()->zoomLimitsChanged(min_level, max_level);
+}
+
 v8::Local<v8::Value> WebFrame::RegisterEmbedderCustomElement(
     const base::string16& name, v8::Local<v8::Object> options) {
   blink::WebExceptionCode c = 0;
@@ -228,6 +232,7 @@ void WebFrame::BuildPrototype(
       .SetMethod("setZoomFactor", &WebFrame::SetZoomFactor)
       .SetMethod("getZoomFactor", &WebFrame::GetZoomFactor)
       .SetMethod("setZoomLevelLimits", &WebFrame::SetZoomLevelLimits)
+      .SetMethod("setLayoutZoomLevelLimits", &WebFrame::SetLayoutZoomLevelLimits)
       .SetMethod("registerEmbedderCustomElement",
                  &WebFrame::RegisterEmbedderCustomElement)
       .SetMethod("registerElementResizeCallback",
diff --git a/atom/renderer/api/atom_api_web_frame.h b/atom/renderer/api/atom_api_web_frame.h
index f530612a4840..37bb94ac8fae 100644
--- a/atom/renderer/api/atom_api_web_frame.h
+++ b/atom/renderer/api/atom_api_web_frame.h
@@ -46,6 +46,7 @@ class WebFrame : public mate::Wrappable<WebFrame> {
   double GetZoomFactor() const;
 
   void SetZoomLevelLimits(double min_level, double max_level);
+  void SetLayoutZoomLevelLimits(double min_level, double max_level);
 
   v8::Local<v8::Value> RegisterEmbedderCustomElement(
       const base::string16& name, v8::Local<v8::Object> options);
diff --git a/lib/browser/api/web-contents.js b/lib/browser/api/web-contents.js
index d363bb051b8b..7e359e6c2d7f 100644
--- a/lib/browser/api/web-contents.js
+++ b/lib/browser/api/web-contents.js
@@ -100,6 +100,7 @@ WebContents.prototype.sendToAll = function (channel, ...args) {
 // Following methods are mapped to webFrame.
 const webFrameMethods = [
   'insertText',
+  'setLayoutZoomLevelLimits',
   'setZoomFactor',
   'setZoomLevel',
   'setZoomLevelLimits'
diff --git a/lib/renderer/web-view/web-view.js b/lib/renderer/web-view/web-view.js
index c8033bea0468..59bbbd89b141 100644
--- a/lib/renderer/web-view/web-view.js
+++ b/lib/renderer/web-view/web-view.js
@@ -390,6 +390,7 @@ var registerWebViewElement = function () {
     'insertText',
     'send',
     'sendInputEvent',
+    'setLayoutZoomLevelLimits',
     'setZoomFactor',
     'setZoomLevel',
     'setZoomLevelLimits'