// Copyright 2016 - 2019 The excelize Authors. All rights reserved. Use of
// this source code is governed by a BSD-style license that can be found in
// the LICENSE file.
//
// Package excelize providing a set of functions that allow you to write to
// and read from XLSX files. Support reads and writes XLSX file generated by
// Microsoft Excel™ 2007 and later. Support save file without losing original
// charts of XLSX. This library needs Go version 1.8 or later.

package excelize

import "encoding/xml"

// decodeCellAnchor directly maps the oneCellAnchor (One Cell Anchor Shape
// Size) and twoCellAnchor (Two Cell Anchor Shape Size). This element
// specifies a two cell anchor placeholder for a group, a shape, or a drawing
// element. It moves with cells and its extents are in EMU units.
type decodeCellAnchor struct {
	EditAs     string            `xml:"editAs,attr,omitempty"`
	From       *decodeFrom       `xml:"from"`
	To         *decodeTo         `xml:"to"`
	Sp         *decodeSp         `xml:"sp"`
	ClientData *decodeClientData `xml:"clientData"`
	Content    string            `xml:",innerxml"`
}

// xdrSp (Shape) directly maps the sp element. This element specifies the
// existence of a single shape. A shape can either be a preset or a custom
// geometry, defined using the SpreadsheetDrawingML framework. In addition to
// a geometry each shape can have both visual and non-visual properties
// attached. Text and corresponding styling information can also be attached
// to a shape. This shape is specified along with all other shapes within
// either the shape tree or group shape elements.
type decodeSp struct {
	NvSpPr *decodeNvSpPr `xml:"nvSpPr"`
	SpPr   *decodeSpPr   `xml:"spPr"`
}

// decodeSp (Non-Visual Properties for a Shape) directly maps the nvSpPr
// element. This element specifies all non-visual properties for a shape. This
// element is a container for the non-visual identification properties, shape
// properties and application properties that are to be associated with a
// shape. This allows for additional information that does not affect the
// appearance of the shape to be stored.
type decodeNvSpPr struct {
	CNvPr   *decodeCNvPr   `xml:"cNvPr"`
	ExtLst  *decodeExt     `xml:"extLst"`
	CNvSpPr *decodeCNvSpPr `xml:"cNvSpPr"`
}

// decodeCNvSpPr (Connection Non-Visual Shape Properties) directly maps the
// cNvSpPr element. This element specifies the set of non-visual properties
// for a connection shape. These properties specify all data about the
// connection shape which do not affect its display within a spreadsheet.
type decodeCNvSpPr struct {
	TxBox bool `xml:"txBox,attr"`
}

// decodeWsDr directly maps the root element for a part of this content type
// shall wsDr. In order to solve the problem that the label structure is
// changed after serialization and deserialization, two different structures
// are defined. decodeWsDr just for deserialization.
type decodeWsDr struct {
	A             string              `xml:"xmlns a,attr"`
	Xdr           string              `xml:"xmlns xdr,attr"`
	R             string              `xml:"xmlns r,attr"`
	OneCellAnchor []*decodeCellAnchor `xml:"oneCellAnchor,omitempty"`
	TwoCellAnchor []*decodeCellAnchor `xml:"twoCellAnchor,omitempty"`
	XMLName       xml.Name            `xml:"http://schemas.openxmlformats.org/drawingml/2006/spreadsheetDrawing wsDr,omitempty"`
}

// decodeTwoCellAnchor directly maps the oneCellAnchor (One Cell Anchor Shape
// Size) and twoCellAnchor (Two Cell Anchor Shape Size). This element
// specifies a two cell anchor placeholder for a group, a shape, or a drawing
// element. It moves with cells and its extents are in EMU units.
type decodeTwoCellAnchor struct {
	From       *decodeFrom       `xml:"from"`
	To         *decodeTo         `xml:"to"`
	Pic        *decodePic        `xml:"pic,omitempty"`
	ClientData *decodeClientData `xml:"clientData"`
}

// decodeCNvPr directly maps the cNvPr (Non-Visual Drawing Properties). This
// element specifies non-visual canvas properties. This allows for additional
// information that does not affect the appearance of the picture to be
// stored.
type decodeCNvPr struct {
	ID    int    `xml:"id,attr"`
	Name  string `xml:"name,attr"`
	Descr string `xml:"descr,attr"`
	Title string `xml:"title,attr,omitempty"`
}

// decodePicLocks directly maps the picLocks (Picture Locks). This element
// specifies all locking properties for a graphic frame. These properties
// inform the generating application about specific properties that have been
// previously locked and thus should not be changed.
type decodePicLocks struct {
	NoAdjustHandles    bool `xml:"noAdjustHandles,attr,omitempty"`
	NoChangeArrowheads bool `xml:"noChangeArrowheads,attr,omitempty"`
	NoChangeAspect     bool `xml:"noChangeAspect,attr"`
	NoChangeShapeType  bool `xml:"noChangeShapeType,attr,omitempty"`
	NoCrop             bool `xml:"noCrop,attr,omitempty"`
	NoEditPoints       bool `xml:"noEditPoints,attr,omitempty"`
	NoGrp              bool `xml:"noGrp,attr,omitempty"`
	NoMove             bool `xml:"noMove,attr,omitempty"`
	NoResize           bool `xml:"noResize,attr,omitempty"`
	NoRot              bool `xml:"noRot,attr,omitempty"`
	NoSelect           bool `xml:"noSelect,attr,omitempty"`
}

// decodeBlip directly maps the blip element in the namespace
// http://purl.oclc.org/ooxml/officeDoc ument/relationships - This element
// specifies the existence of an image (binary large image or picture) and
// contains a reference to the image data.
type decodeBlip struct {
	Embed  string `xml:"embed,attr"`
	Cstate string `xml:"cstate,attr,omitempty"`
	R      string `xml:"r,attr"`
}

// decodeStretch directly maps the stretch element. This element specifies
// that a BLIP should be stretched to fill the target rectangle. The other
// option is a tile where a BLIP is tiled to fill the available area.
type decodeStretch struct {
	FillRect string `xml:"fillRect"`
}

// decodeOff directly maps the colOff and rowOff element. This element is used
// to specify the column offset within a cell.
type decodeOff struct {
	X int `xml:"x,attr"`
	Y int `xml:"y,attr"`
}

// decodeExt directly maps the ext element.
type decodeExt struct {
	Cx int `xml:"cx,attr"`
	Cy int `xml:"cy,attr"`
}

// decodePrstGeom directly maps the prstGeom (Preset geometry). This element
// specifies when a preset geometric shape should be used instead of a custom
// geometric shape. The generating application should be able to render all
// preset geometries enumerated in the ST_ShapeType list.
type decodePrstGeom struct {
	Prst string `xml:"prst,attr"`
}

// decodeXfrm directly maps the xfrm (2D Transform for Graphic Frame). This
// element specifies the transform to be applied to the corresponding graphic
// frame. This transformation is applied to the graphic frame just as it would
// be for a shape or group shape.
type decodeXfrm struct {
	Off decodeOff `xml:"off"`
	Ext decodeExt `xml:"ext"`
}

// decodeCNvPicPr directly maps the cNvPicPr (Non-Visual Picture Drawing
// Properties). This element specifies the non-visual properties for the picture
// canvas. These properties are to be used by the generating application to
// determine how certain properties are to be changed for the picture object in
// question.
type decodeCNvPicPr struct {
	PicLocks decodePicLocks `xml:"picLocks"`
}

// directly maps the nvPicPr (Non-Visual Properties for a Picture). This
// element specifies all non-visual properties for a picture. This element is
// a container for the non-visual identification properties, shape properties
// and application properties that are to be associated with a picture. This
// allows for additional information that does not affect the appearance of
// the picture to be stored.
type decodeNvPicPr struct {
	CNvPr    decodeCNvPr    `xml:"cNvPr"`
	CNvPicPr decodeCNvPicPr `xml:"cNvPicPr"`
}

// decodeBlipFill directly maps the blipFill (Picture Fill). This element
// specifies the kind of picture fill that the picture object has. Because a
// picture has a picture fill already by default, it is possible to have two
// fills specified for a picture object.
type decodeBlipFill struct {
	Blip    decodeBlip    `xml:"blip"`
	Stretch decodeStretch `xml:"stretch"`
}

// decodeSpPr directly maps the spPr (Shape Properties). This element
// specifies the visual shape properties that can be applied to a picture.
// These are the same properties that are allowed to describe the visual
// properties of a shape but are used here to describe the visual appearance
// of a picture within a document.
type decodeSpPr struct {
	Xfrm     decodeXfrm     `xml:"xfrm"`
	PrstGeom decodePrstGeom `xml:"prstGeom"`
}

// decodePic elements encompass the definition of pictures within the
// DrawingML framework. While pictures are in many ways very similar to shapes
// they have specific properties that are unique in order to optimize for
// picture- specific scenarios.
type decodePic struct {
	NvPicPr  decodeNvPicPr  `xml:"nvPicPr"`
	BlipFill decodeBlipFill `xml:"blipFill"`
	SpPr     decodeSpPr     `xml:"spPr"`
}

// decodeFrom specifies the starting anchor.
type decodeFrom struct {
	Col    int `xml:"col"`
	ColOff int `xml:"colOff"`
	Row    int `xml:"row"`
	RowOff int `xml:"rowOff"`
}

// decodeTo directly specifies the ending anchor.
type decodeTo struct {
	Col    int `xml:"col"`
	ColOff int `xml:"colOff"`
	Row    int `xml:"row"`
	RowOff int `xml:"rowOff"`
}

// decodeClientData directly maps the clientData element. An empty element
// which specifies (via attributes) certain properties related to printing and
// selection of the drawing object. The fLocksWithSheet attribute (either true
// or false) determines whether to disable selection when the sheet is
// protected, and fPrintsWithSheet attribute (either true or false) determines
// whether the object is printed when the sheet is printed.
type decodeClientData struct {
	FLocksWithSheet  bool `xml:"fLocksWithSheet,attr"`
	FPrintsWithSheet bool `xml:"fPrintsWithSheet,attr"`
}