Add devtools eyedropper support

Was not using anything Chrome specific, and could be directly reused
by us.

Task-number: QTBUG-85171
Change-Id: Ib739cead6d721785de5843d0c971f77b77f20359
Reviewed-by: Peter Varga <pvarga@inf.u-szeged.hu>

3 files changed, 36 insertions, 0 deletions

diff --git a/src/core/devtools_frontend_qt.cpp b/src/core/devtools_frontend_qt.cpp
index 71d51190a..553757fbb 100644
--- a/src/core/devtools_frontend_qt.cpp
+++ b/src/core/devtools_frontend_qt.cpp
@@ -59,6 +59,7 @@
 #include "base/strings/utf_string_conversions.h"
 #include "base/task/post_task.h"
 #include "base/values.h"
+#include "chrome/browser/devtools/devtools_eye_dropper.h"
 #include "chrome/common/url_constants.h"
 #include "components/prefs/in_memory_pref_store.h"
 #include "components/prefs/json_pref_store.h"
@@ -531,6 +532,11 @@ void DevToolsFrontendQt::HandleMessageFromDevToolsFrontend(const std::string &me
         Activate();
     } else if (method == "closeWindow") {
         web_contents()->Close();
+    } else if (method == "setEyeDropperActive" && params->GetSize() == 1) {
+        bool active;
+        if (!params->GetBoolean(0, &active))
+            return;
+        SetEyeDropperActive(active);
     } else {
         VLOG(1) << "Unimplemented devtools method: " << message;
         return;
@@ -540,6 +546,30 @@ void DevToolsFrontendQt::HandleMessageFromDevToolsFrontend(const std::string &me
         SendMessageAck(request_id, nullptr);
 }
 
+void DevToolsFrontendQt::SetEyeDropperActive(bool active)
+{
+    if (!m_inspectedContents)
+        return;
+    if (active) {
+        m_eyeDropper.reset(new DevToolsEyeDropper(
+                               m_inspectedContents,
+                               base::Bind(&DevToolsFrontendQt::ColorPickedInEyeDropper,
+                                          base::Unretained(this))));
+    } else {
+        m_eyeDropper.reset();
+    }
+}
+
+void DevToolsFrontendQt::ColorPickedInEyeDropper(int r, int g, int b, int a)
+{
+    base::DictionaryValue color;
+    color.SetInteger("r", r);
+    color.SetInteger("g", g);
+    color.SetInteger("b", b);
+    color.SetInteger("a", a);
+    CallClientFunction("DevToolsAPI.eyeDropperPickedColor", &color, nullptr, nullptr);
+}
+
 void DevToolsFrontendQt::DispatchProtocolMessage(content::DevToolsAgentHost *agentHost, base::span<const uint8_t> message)
 {
     Q_UNUSED(agentHost);
diff --git a/src/core/devtools_frontend_qt.h b/src/core/devtools_frontend_qt.h
index 423131c4e..aac5909dc 100644
--- a/src/core/devtools_frontend_qt.h
+++ b/src/core/devtools_frontend_qt.h
@@ -65,6 +65,7 @@ class RenderViewHost;
 class WebContents;
 }  // namespace content
 
+class DevToolsEyeDropper;
 class PersistentPrefStore;
 
 namespace QtWebEngineCore {
@@ -113,6 +114,8 @@ private:
     void RemovePreference(const std::string &name);
     void ClearPreferences();
     void CreateJsonPreferences(bool clear);
+    void SetEyeDropperActive(bool active);
+    void ColorPickedInEyeDropper(int r, int g, int b, int a);
 
     // We shouldn't be keeping it alive
     QWeakPointer<WebContentsAdapter> m_frontendAdapter;
@@ -123,6 +126,7 @@ private:
     int m_inspect_element_at_x;
     int m_inspect_element_at_y;
     std::unique_ptr<content::DevToolsFrontendHost> m_frontendHost;
+    std::unique_ptr<DevToolsEyeDropper> m_eyeDropper;
 
     class NetworkResourceLoader;
     std::set<std::unique_ptr<NetworkResourceLoader>, base::UniquePtrComparator> m_loaders;
diff --git a/src/core/qtwebengine_sources.gni b/src/core/qtwebengine_sources.gni
index 7ff192bf3..dc337e1de 100644
--- a/src/core/qtwebengine_sources.gni
+++ b/src/core/qtwebengine_sources.gni
@@ -64,6 +64,8 @@ source_set("qtwebengine_sources") {
     "//chrome/browser/custom_handlers/protocol_handler_registry.h",
     "//chrome/browser/custom_handlers/protocol_handler_registry_factory.cc",
     "//chrome/browser/custom_handlers/protocol_handler_registry_factory.h",
+    "//chrome/browser/devtools/devtools_eye_dropper.cc",
+    "//chrome/browser/devtools/devtools_eye_dropper.h",
     "//chrome/browser/media/webrtc/desktop_media_list.h",
     "//chrome/browser/net/chrome_mojo_proxy_resolver_factory.cc",
     "//chrome/browser/net/chrome_mojo_proxy_resolver_factory.h",