From 1de5a58dbe8377220f9d7d3d68d9917b562e29c2 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@koston.org>
Date: Sat, 26 Sep 2026 02:36:31 +0100
Subject: [PATCH] [display] Use register_apply_condition for
 display.is_displaying_page (#19705)

---
 esphome/components/display/__init__.py           | 13 ++-----------
 esphome/components/display/display.h             | 12 ------------
 tests/components/ssd1306_i2c/common-actions.yaml | 16 ++++++++++++++++
 .../ssd1306_i2c/test-actions.esp8266-ard.yaml    |  7 +++++++
 4 files changed, 25 insertions(+), 23 deletions(-)
 create mode 100644 tests/components/ssd1306_i2c/common-actions.yaml
 create mode 100644 tests/components/ssd1306_i2c/test-actions.esp8266-ard.yaml

diff --git a/esphome/components/display/__init__.py b/esphome/components/display/__init__.py
index b664579be9..1cd75ddaf0 100644
--- a/esphome/components/display/__init__.py
+++ b/esphome/components/display/__init__.py
@@ -39,9 +39,6 @@ DisplayPage = display_ns.class_("DisplayPage")
 DisplayPagePtr = DisplayPage.operator("ptr")
 DisplayRef = Display.operator("ref")
 DisplayPageShowAction = display_ns.class_("DisplayPageShowAction", automation.Action)
-DisplayIsDisplayingPageCondition = display_ns.class_(
-    "DisplayIsDisplayingPageCondition", automation.Condition
-)
 DisplayOnPageChangeTrigger = display_ns.class_(
     "DisplayOnPageChangeTrigger", automation.Trigger
 )
@@ -301,9 +298,8 @@ automation.register_apply_action(
 )
 
 
-@automation.register_condition(
+automation.register_apply_condition(
     "display.is_displaying_page",
-    DisplayIsDisplayingPageCondition,
     cv.maybe_simple_value(
         {
             cv.GenerateID(CONF_ID): cv.use_id(Display),
@@ -311,13 +307,8 @@ automation.register_apply_action(
         },
         key=CONF_PAGE_ID,
     ),
+    automation.ApplyCall("get_active_page() == {}", ((CONF_PAGE_ID, DisplayPagePtr),)),
 )
-async def display_is_displaying_page_to_code(config, condition_id, template_arg, args):
-    paren = await cg.get_variable(config[CONF_ID])
-    page = await cg.get_variable(config[CONF_PAGE_ID])
-    var = cg.new_Pvariable(condition_id, template_arg, paren)
-    cg.add(var.set_page(page))
-    return var
 
 
 @coroutine_with_priority(CoroPriority.CORE)
diff --git a/esphome/components/display/display.h b/esphome/components/display/display.h
index af5a7bc132..bebeba8dcb 100644
--- a/esphome/components/display/display.h
+++ b/esphome/components/display/display.h
@@ -848,18 +848,6 @@ template<typename... Ts> class DisplayPageShowAction final : public Action<Ts...
   }
 };
 
-template<typename... Ts> class DisplayIsDisplayingPageCondition final : public Condition<Ts...> {
- public:
-  DisplayIsDisplayingPageCondition(Display *parent) : parent_(parent) {}
-
-  void set_page(DisplayPage *page) { this->page_ = page; }
-  bool check(const Ts &...x) override { return this->parent_->get_active_page() == this->page_; }
-
- protected:
-  Display *parent_;
-  DisplayPage *page_;
-};
-
 class DisplayOnPageChangeTrigger final : public Trigger<DisplayPage *, DisplayPage *> {
  public:
   explicit DisplayOnPageChangeTrigger(Display *parent) { parent->add_on_page_change_trigger(this); }
diff --git a/tests/components/ssd1306_i2c/common-actions.yaml b/tests/components/ssd1306_i2c/common-actions.yaml
new file mode 100644
index 0000000000..737fe7f26b
--- /dev/null
+++ b/tests/components/ssd1306_i2c/common-actions.yaml
@@ -0,0 +1,16 @@
+button:
+  - platform: template
+    name: Page check
+    on_press:
+      - if:
+          condition:
+            display.is_displaying_page: ssd1306_i2c_page1
+          then:
+            - logger.log: On page 1
+      - if:
+          condition:
+            display.is_displaying_page:
+              id: ssd1306_i2c_ssd1306_i2c_display
+              page_id: ssd1306_i2c_page2
+          then:
+            - logger.log: On page 2
diff --git a/tests/components/ssd1306_i2c/test-actions.esp8266-ard.yaml b/tests/components/ssd1306_i2c/test-actions.esp8266-ard.yaml
new file mode 100644
index 0000000000..e18129c919
--- /dev/null
+++ b/tests/components/ssd1306_i2c/test-actions.esp8266-ard.yaml
@@ -0,0 +1,7 @@
+substitutions:
+  reset_pin: GPIO2
+
+packages:
+  i2c: !include ../../test_build_components/common/i2c/esp8266-ard.yaml
+  ssd1306_i2c: !include common.yaml
+  actions: !include common-actions.yaml