From 3ef4f994fab0dfda58c593a03a2cb39a062dc321 Mon Sep 17 00:00:00 2001
From: Weng Xuetian <wengxt@gmail.com>
Date: Sun, 19 Dec 2021 02:02:06 -0800
Subject: [PATCH] Implemnt preedit_styling for text input v2.

---
 src/wayland/textinput_v2_interface.cpp | 17 +++++++++++++++++
 src/wayland/textinput_v2_interface.h   | 11 +++++++++++
 src/wayland/textinput_v2_interface_p.h |  1 +
 3 files changed, 29 insertions(+)

diff --git a/src/wayland/textinput_v2_interface.cpp b/src/wayland/textinput_v2_interface.cpp
index 004567ee7b..c5d43f1ae6 100644
--- a/src/wayland/textinput_v2_interface.cpp
+++ b/src/wayland/textinput_v2_interface.cpp
@@ -180,6 +180,18 @@ void TextInputV2InterfacePrivate::preEdit(const QString &text, const QString &co
     }
 }
 
+void TextInputV2InterfacePrivate::preEditStyling(uint32_t index, uint32_t length, uint32_t style)
+{
+    if (!surface) {
+        return;
+    }
+
+    const auto clientResources = textInputsForClient(surface->client());
+    for (auto resource : clientResources) {
+        send_preedit_styling(resource->handle, index, length, style);
+    }
+}
+
 void TextInputV2InterfacePrivate::commitString(const QString &text)
 {
     if (!surface) {
@@ -444,6 +456,11 @@ void TextInputV2Interface::preEdit(const QString &text, const QString &commit)
     d->preEdit(text, commit);
 }
 
+void TextInputV2Interface::preEditStyling(uint32_t index, uint32_t length, uint32_t style)
+{
+    d->preEditStyling(index, length, style);
+}
+
 void TextInputV2Interface::commitString(const QString &text)
 {
     d->commitString(text);
diff --git a/src/wayland/textinput_v2_interface.h b/src/wayland/textinput_v2_interface.h
index f0c3530b22..5481f078b0 100644
--- a/src/wayland/textinput_v2_interface.h
+++ b/src/wayland/textinput_v2_interface.h
@@ -169,6 +169,17 @@ public:
      */
     void setPreEditCursor(qint32 index);
 
+    /**
+     * Sets the style for a range of text for the composing text (as byte offset).
+     *
+     * The Client applies the @p index together with {@link preEdit}.
+     * @param index The position relative to the start of the composing text
+     * @param length The length of the style to apply on
+     * @param style style flag
+     * @see preEdit
+     */
+    void preEditStyling(uint32_t index, uint32_t length, uint32_t style);
+
     /**
      * Notify when the text around the current cursor position should be deleted.
      *
diff --git a/src/wayland/textinput_v2_interface_p.h b/src/wayland/textinput_v2_interface_p.h
index 1498989e75..f39a549b21 100644
--- a/src/wayland/textinput_v2_interface_p.h
+++ b/src/wayland/textinput_v2_interface_p.h
@@ -37,6 +37,7 @@ public:
     void sendEnter(SurfaceInterface *surface, quint32 serial);
     void sendLeave(quint32 serial, SurfaceInterface *surface);
     void preEdit(const QString &text, const QString &commit);
+    void preEditStyling(uint32_t index, uint32_t length, uint32_t style);
     void commitString(const QString &text);
     void deleteSurroundingText(quint32 beforeLength, quint32 afterLength);
     void setTextDirection(Qt::LayoutDirection direction);