VR: Rename ContentRectangle to UiElement

chrome/browser/android/vr_shell/ui_elements.h

-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef CHROME_BROWSER_ANDROID_VR_SHELL_UI_ELEMENTS_H_
-#define CHROME_BROWSER_ANDROID_VR_SHELL_UI_ELEMENTS_H_
-
-#include <memory>
-#include <string>
-#include <vector>
-
-#include "base/macros.h"
-#include "device/vr/vr_types.h"
-
-namespace base {
-class TimeTicks;
-}
-
-namespace vr_shell {
-
-class Animation;
-
-enum XAnchoring {
-  XNONE = 0,
-  XLEFT,
-  XRIGHT,
-};
-
-enum YAnchoring {
-  YNONE = 0,
-  YTOP,
-  YBOTTOM,
-};
-
-enum Fill {
-  NONE = 0,
-  // The element is filled with part of the HTML UI as specified by the copy
-  // rect.
-  SPRITE = 1,
-  // The element is filled with a radial gradient as specified by the edge and
-  // center color.
-  OPAQUE_GRADIENT = 2,
-  // Same as OPAQUE_GRADIENT but the element is drawn as a grid.
-  GRID_GRADIENT = 3,
-  // The element is filled with the content web site. Only one content element
-  // may be added to the
-  // scene.
-  CONTENT = 4,
-};
-
-struct Transform {
-  Transform();
-
-  void MakeIdentity();
-  void Rotate(const vr::Quatf& quat);
-  void Rotate(const vr::RotationAxisAngle& axis_angle);
-  void Translate(const gfx::Vector3dF& translation);
-  void Scale(const gfx::Vector3dF& scale);
-
-  vr::Mat4f to_world;
-};
-
-class WorldRectangle {
- public:
-  const vr::Mat4f& TransformMatrix() const;
-  Transform* mutable_transform() { return &transform_; }
-
-  gfx::Point3F GetCenter() const;
-  gfx::Vector3dF GetNormal() const;
-
-  // Computes the distance from |ray_origin| to this rectangles's plane, along
-  // |ray_vector|. Returns true and populates |distance| if the calculation is
-  // possible, and false if the ray is parallel to the plane.
-  bool GetRayDistance(const gfx::Point3F& ray_origin,
-                      const gfx::Vector3dF& ray_vector,
-                      float* distance) const;
-
-  // Projects a 3D world point onto the X and Y axes of the transformed
-  // rectangle, returning 2D coordinates relative to the un-transformed unit
-  // rectangle. This allows beam intersection points to be mapped to sprite
-  // pixel coordinates. Points that fall onto the rectangle will generate X and
-  // Y values on the interval [-0.5, 0.5].
-  gfx::PointF GetUnitRectangleCoordinates(const gfx::Point3F& world_point);
-
- private:
-  Transform transform_;
-};
-
-struct ContentRectangle : public WorldRectangle {
-  ContentRectangle();
-  ~ContentRectangle();
-
-  void Animate(const base::TimeTicks& time);
-
-  // Indicates whether the element should be visually rendered.
-  bool IsVisible() const;
-
-  // Indicates whether the element should be tested for cursor input.
-  bool IsHitTestable() const;
-
-  // Valid IDs are non-negative.
-  int id = -1;
-
-  // Name string for debugging and testing purposes.
-  std::string name;
-
-  // If a non-negative parent ID is specified, applicable transformations
-  // are applied relative to the parent, rather than absolutely.
-  int parent_id = -1;
-
-  // If true, this object will be visible.
-  bool visible = true;
-
-  // If false, the reticle will not hit the element, even if visible.
-  bool hit_testable = true;
-
-  // If true, transformations will be applied relative to the field of view,
-  // rather than the world.
-  bool lock_to_fov = false;
-
-  // Specifies the region (in pixels) of a texture to render.
-  gfx::Rect copy_rect = {0, 0, 0, 0};
-
-  // The size of the object.  This does not affect children.
-  gfx::Vector3dF size = {1.0f, 1.0f, 1.0f};
-
-  // The scale of the object, and its children.
-  gfx::Vector3dF scale = {1.0f, 1.0f, 1.0f};
-
-  // The rotation of the object, and its children.
-  vr::RotationAxisAngle rotation = {1.0f, 0.0f, 0.0f, 0.0f};
-
-  // The translation of the object, and its children.  Translation is applied
-  // after rotation and scaling.
-  gfx::Vector3dF translation = {0.0f, 0.0f, 0.0f};
-
-  // The opacity of the object (between 0.0 and 1.0).
-  float opacity = 1.0f;
-
-  // The computed opacity, incorporating opacity of parent objects.
-  float computed_opacity;
-
-  // The computed lock to the FoV, incorporating lock of parent objects.
-  bool computed_lock_to_fov;
-
-  // If anchoring is specified, the translation will be relative to the
-  // specified edge(s) of the parent, rather than the center.  A parent object
-  // must be specified when using anchoring.
-  XAnchoring x_anchoring = XAnchoring::XNONE;
-  YAnchoring y_anchoring = YAnchoring::YNONE;
-
-  // Animations that affect the properties of the object over time.
-  std::vector<std::unique_ptr<Animation>> animations;
-
-  Fill fill = Fill::NONE;
-
-  vr::Colorf edge_color = {1.0f, 1.0f, 1.0f, 1.0f};
-  vr::Colorf center_color = {1.0f, 1.0f, 1.0f, 1.0f};
-
-  int gridline_count = 1;
-
-  int draw_phase = 1;
-
-  // This transform can be used by children to derive position of its parent.
-  Transform inheritable_transform;
-
-  // A flag usable during transformation calculates to avoid duplicate work.
-  bool dirty;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ContentRectangle);
-};
-
-}  // namespace vr_shell
-
-#endif  // CHROME_BROWSER_ANDROID_VR_SHELL_UI_ELEMENTS_H_