From 2f218970ba64424308c12ba0eb8e545f6778fcbd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ole-Andr=C3=A9=20Rodlie?= <ole.andre.rodlie@gmail.com>
Date: Tue, 27 Aug 2024 21:32:25 +0200
Subject: [PATCH] TransformEffects: support SVG #173

Only 'follow path' is supported.
---
 .../TransformEffects/followpatheffect.cpp     | 28 ++++++++++++++++++
 src/core/TransformEffects/followpatheffect.h  |  6 ++++
 .../transformeffectcollection.cpp             | 29 +++++++++++++++++++
 .../transformeffectcollection.h               |  7 +++++
 4 files changed, 70 insertions(+)

diff --git a/src/core/TransformEffects/followpatheffect.cpp b/src/core/TransformEffects/followpatheffect.cpp
index 1e577464a..f4e4f8217 100644
--- a/src/core/TransformEffects/followpatheffect.cpp
+++ b/src/core/TransformEffects/followpatheffect.cpp
@@ -28,6 +28,7 @@
 #include "Boxes/pathbox.h"
 #include "Animators/qrealanimator.h"
 #include "Animators/transformanimator.h"
+#include "svgexporter.h"
 
 FollowPathEffect::FollowPathEffect() :
     TargetTransformEffect("follow path", TransformEffectType::followPath) {
@@ -181,3 +182,30 @@ void FollowPathEffect::applyEffect(const qreal relFrame,
     posX += posXChange; //p1.x()*infl;
     posY += posYChange; //p1.y()*infl;
 }
+
+QDomElement FollowPathEffect::saveFollowPathSVG(SvgExporter &exp,
+                                                const FrameRange &visRange,
+                                                QDomElement &childElement,
+                                                QDomElement &parentElement) const
+{
+    const auto target = targetProperty()->getTarget();
+    if (!target) { return parentElement; }
+    mComplete->saveQrealSVG(exp,
+                            childElement,
+                            visRange,
+                            "transform",
+                            1.,
+                            false,
+                            "",
+                            "%1",
+                            "",
+                            "",
+                            true,
+                            mRotate->getValue(),
+                            target->prp_getName());
+    const auto transform = target->getBoxTransformAnimator();
+    const auto transformed = transform->saveSVG(exp,
+                                                visRange,
+                                                parentElement);
+    return transformed;
+}
diff --git a/src/core/TransformEffects/followpatheffect.h b/src/core/TransformEffects/followpatheffect.h
index 53a32d82b..9c9f55aca 100644
--- a/src/core/TransformEffects/followpatheffect.h
+++ b/src/core/TransformEffects/followpatheffect.h
@@ -42,6 +42,12 @@ class FollowPathEffect : public TargetTransformEffect {
                      qreal &shearX, qreal &shearY,
                      QMatrix& postTransform,
                      BoundingBox* const parent) override;
+
+    QDomElement saveFollowPathSVG(SvgExporter& exp,
+                                  const FrameRange& visRange,
+                                  QDomElement &childElement,
+                                  QDomElement &parentElement) const;
+
 private:
     void setRotScaleAfterTargetChange(
                 BoundingBox* const oldTarget,
diff --git a/src/core/TransformEffects/transformeffectcollection.cpp b/src/core/TransformEffects/transformeffectcollection.cpp
index 9fd184e16..b9e2c6f51 100644
--- a/src/core/TransformEffects/transformeffectcollection.cpp
+++ b/src/core/TransformEffects/transformeffectcollection.cpp
@@ -91,6 +91,35 @@ void TransformEffectCollection::prp_readProperty_impl(eReadStream &src) {
     }
 }
 
+bool TransformEffectCollection::hasEffectsSVG()
+{
+    const auto& children = ca_getChildren();
+    for (const auto& effect : children) {
+        if (const auto followPath = enve_cast<FollowPathEffect*>(effect.get())) {
+            return true;
+        }
+    }
+    return false;
+}
+
+QDomElement TransformEffectCollection::saveEffectsSVG(SvgExporter &exp,
+                                                      const FrameRange &visRange,
+                                                      QDomElement &childElement,
+                                                      const QDomElement &parentElement) const
+{
+    QDomElement result = parentElement;
+    const auto& children = ca_getChildren();
+    for (const auto& effect : children) {
+        if (const auto path = enve_cast<FollowPathEffect*>(effect.get())) {
+            result = path->saveFollowPathSVG(exp,
+                                             visRange,
+                                             childElement,
+                                             result);
+        }
+    }
+    return result;
+}
+
 void TransformEffectCollection::applyEffects(
         const qreal relFrame,
         qreal& pivotX, qreal& pivotY,
diff --git a/src/core/TransformEffects/transformeffectcollection.h b/src/core/TransformEffects/transformeffectcollection.h
index d6ac7c071..0a27236cf 100644
--- a/src/core/TransformEffects/transformeffectcollection.h
+++ b/src/core/TransformEffects/transformeffectcollection.h
@@ -59,8 +59,15 @@ class CORE_EXPORT TransformEffectCollection :
     void prp_readProperty_impl(eReadStream &src);
 
     bool hasEffects();
+    bool hasEffectsSVG();
+
     void readTransformEffect(eReadStream &target);
 
+    QDomElement saveEffectsSVG(SvgExporter& exp,
+                               const FrameRange& visRange,
+                               QDomElement &childElement,
+                               const QDomElement &parentElement) const;
+
     void applyEffects(const qreal relFrame,
                       qreal& pivotX, qreal& pivotY,
                       qreal& posX, qreal& posY,