mirror of
https://github.com/xiaoqidun/ofdgo.git
synced 2026-10-29 14:31:12 +08:00
269 lines
9.4 KiB
Go
269 lines
9.4 KiB
Go
// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package ofdgo
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/xml"
|
|
"fmt"
|
|
"reflect"
|
|
"slices"
|
|
)
|
|
|
|
// CropCompositeImage 将内部图片与页面矩形取交集，保留原裁剪、蒙版、变换和边框
|
|
// 只收窄可见区域，撤销恢复上次裁剪，不重采样图片
|
|
// 入参: page 页面索引, path 父复合路径, index 图片序号, box 页面毫米范围
|
|
// 返回: error 错误信息
|
|
func (e *Editor) CropCompositeImage(page int, path ObjectPath, index int, box Box) error {
|
|
if _, err := creationBox(editorBoxString(box)); err != nil {
|
|
return err
|
|
}
|
|
return e.editCompositeObjects(page, path, []int{index}, func(_ *Renderer, nodes []*editorCompositeNode, members []CompositeMember) error {
|
|
node, member := nodes[0], members[0]
|
|
if !member.Capabilities.CropImage {
|
|
return fmt.Errorf("composite image cannot be cropped")
|
|
}
|
|
before := member.Bounds
|
|
if box.X <= before.X && box.Y <= before.Y && box.X+box.W >= before.X+before.W && box.Y+box.H >= before.Y+before.H {
|
|
return nil
|
|
}
|
|
if box.X+box.W <= before.X || box.Y+box.H <= before.Y || box.X >= before.X+before.W || box.Y >= before.Y+before.H {
|
|
return fmt.Errorf("crop does not intersect the image")
|
|
}
|
|
clips := node.object.ImageObject.Clips
|
|
inverse, _ := node.matrix(clips.usesObjectMatrix()).Invert()
|
|
shape, err := NewShape(ShapeRectangle, box)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
fill, stroke := true, false
|
|
shape.Fill, shape.Stroke = &fill, &stroke
|
|
return appendCompositeClip(node, shape, inverse, true)
|
|
})
|
|
}
|
|
|
|
// ResetCompositeImageCrop 仅移除本次编辑追加的裁剪，保留输入文件中的裁剪、蒙版和其他属性
|
|
// 入参: page 页面索引, path 父路径, index 图片序号
|
|
// 返回: error 错误信息
|
|
func (e *Editor) ResetCompositeImageCrop(page int, path ObjectPath, index int) error {
|
|
return e.editCompositeObjects(page, path, []int{index}, func(_ *Renderer, nodes []*editorCompositeNode, _ []CompositeMember) error {
|
|
return resetCompositeImageCrop(nodes[0])
|
|
})
|
|
}
|
|
|
|
// ResetImageCrop 还原从内部范围粘贴到页面的图片裁剪，保留原始裁剪与父范围限制
|
|
// 仅处理当前会话记录的新增裁剪，无还原记录时不修改对象
|
|
// 入参: page 页面索引, id 图片标识
|
|
// 返回: error 错误信息
|
|
func (e *Editor) ResetImageCrop(page int, id string) error {
|
|
object, err := e.Object(page, id)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if object.Type != "ImageObject" {
|
|
return fmt.Errorf("object %q is not an image", id)
|
|
}
|
|
if object.state.crop == nil {
|
|
return nil
|
|
}
|
|
origin := e.snapshotOrigin(object)
|
|
var data []byte
|
|
if origin == nil {
|
|
data, err = editorObjectXML(object)
|
|
} else {
|
|
data, err = editorXMLObject(origin.data, origin.node, origin.object, object)
|
|
if err == nil {
|
|
data, err = editorXMLStandalone(data, origin.node)
|
|
}
|
|
}
|
|
if err != nil {
|
|
return err
|
|
}
|
|
node, err := newEditorCompositeNode(data)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
node.setState(object.state)
|
|
if err := resetCompositeImageCrop(node); err != nil {
|
|
return err
|
|
}
|
|
node.object.state = node.states[id]
|
|
if origin == nil {
|
|
return e.UpdateObject(page, id, node.object)
|
|
}
|
|
node.node.parent = origin.node.parent
|
|
next := &editorObjectOrigin{page: origin.page, data: node.data, node: node.node, object: node.object}
|
|
return e.updateObjectOrigins(page, []GraphicObject{node.object}, true, map[string]*editorObjectOrigin{id: next})
|
|
}
|
|
|
|
// FitCompositeImage 按原像素比例适应或填充内部图片框，保留原始裁剪和蒙版
|
|
// 入参: page 页面索引, path 父路径, index 图片序号, mode 为contain或cover
|
|
// 返回: error 错误信息
|
|
func (e *Editor) FitCompositeImage(page int, path ObjectPath, index int, mode string) error {
|
|
return e.editCompositeObjects(page, path, []int{index}, func(_ *Renderer, nodes []*editorCompositeNode, members []CompositeMember) error {
|
|
node := nodes[0]
|
|
if !members[0].Capabilities.FitImage {
|
|
return fmt.Errorf("composite image fitting is not supported")
|
|
}
|
|
if err := resetCompositeImageCrop(node); err != nil {
|
|
return err
|
|
}
|
|
object := cloneEditorData(node.object)
|
|
if err := e.fitImage(&object.ImageObject, mode); err != nil {
|
|
return err
|
|
}
|
|
object.ImageObject.Clips = node.object.ImageObject.Clips
|
|
if err := node.update(object); err != nil {
|
|
return err
|
|
}
|
|
if mode == "contain" {
|
|
return nil
|
|
}
|
|
box, _ := ParseBox(object.ImageObject.Boundary)
|
|
shape, err := NewShape(ShapeRectangle, Box{W: box.W, H: box.H})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
fill, stroke := true, false
|
|
shape.Fill, shape.Stroke = &fill, &stroke
|
|
frame := node.parent.Multiply(TranslationMatrix(box.X, box.Y))
|
|
if !node.boundaryInCTM {
|
|
frame = TranslationMatrix(box.X, box.Y).Multiply(node.parent)
|
|
}
|
|
clips := object.ImageObject.Clips
|
|
inverse, _ := node.matrix(clips.usesObjectMatrix()).Invert()
|
|
return appendCompositeClip(node, shape, inverse.Multiply(frame), true)
|
|
})
|
|
}
|
|
|
|
// matrix 获取对象局部坐标到页面的变换，兼容旧式内联边界
|
|
// 入参: transform 是否包含对象CTM
|
|
// 返回: Matrix 坐标变换
|
|
func (n *editorCompositeNode) matrix(transform bool) Matrix {
|
|
boundary, ctm := editorGeometry(n.object)
|
|
box, _ := ParseBox(boundary)
|
|
m := IdentityMatrix
|
|
if transform {
|
|
m = NewMatrix(ctm)
|
|
if n.object.Type == "ImageObject" && ctm == "" {
|
|
m = Matrix{a: box.W, d: box.H}
|
|
}
|
|
}
|
|
if n.boundaryInCTM || n.object.Type == "CompositeObject" || n.object.Type == "CompositeGraphicUnit" {
|
|
return n.parent.Multiply(TranslationMatrix(box.X, box.Y)).Multiply(m)
|
|
}
|
|
if !transform {
|
|
return TranslationMatrix(box.X, box.Y)
|
|
}
|
|
return TranslationMatrix(box.X, box.Y).Multiply(n.parent).Multiply(m)
|
|
}
|
|
|
|
// appendCompositeClip 追加独立交集裁剪并记录可还原序号，保留原始裁剪XML
|
|
// 入参: node 对象节点, shape 裁剪路径, matrix 路径到裁剪坐标的变换, track 是否记录还原序号
|
|
// 返回: error 错误信息
|
|
func appendCompositeClip(node *editorCompositeNode, shape PathObject, matrix Matrix, track bool) error {
|
|
clip := Clip{Area: []ClipArea{{CTM: matrix.String(), Path: []PathObject{shape}}}}
|
|
if clips := *editorObjectClips(&node.object); clips != nil && slices.ContainsFunc(clips.Clip, func(previous Clip) bool { return reflect.DeepEqual(previous, clip) }) {
|
|
return nil
|
|
}
|
|
state := node.states[editorObjectID(node.object)]
|
|
if track {
|
|
crop := editorCompositeCrop{exists: node.node.child("Clips") != nil}
|
|
if state.crop != nil {
|
|
crop = *state.crop
|
|
}
|
|
count := 0
|
|
if clips := node.object.ImageObject.Clips; clips != nil {
|
|
count = len(clips.Clip)
|
|
}
|
|
crop.indexes = append(slices.Clone(crop.indexes), count)
|
|
state.crop = &crop
|
|
}
|
|
data, err := encodeOFDXML(func(x *ofdXML) {
|
|
x.clips(&Clips{Clip: []Clip{clip}}, "")
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
data = bytes.TrimPrefix(data, []byte(xml.Header))
|
|
root, err := parseEditorXML(data)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
var patch editorXMLPatch
|
|
if original := node.node.child("Clips"); original != nil {
|
|
clip, err := editorXMLEncodedFragment(data, root.children[0], original.name.Space)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
content := append(bytes.Clone(node.data[original.open:original.close]), clip...)
|
|
patch = editorXMLContent(node.data, original, content)
|
|
} else {
|
|
data, err = editorXMLEncodedFragment(data, root, node.node.name.Space)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if actions := node.node.child("Actions"); actions != nil {
|
|
patch = editorXMLPatch{actions.end, actions.end, data}
|
|
} else {
|
|
content := append(data, node.data[node.node.open:node.node.close]...)
|
|
patch = editorXMLContent(node.data, node.node, content)
|
|
}
|
|
}
|
|
updated, err := newEditorCompositeNode(editorPatchXML(node.data, []editorXMLPatch{patch}))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
node.data, node.node, node.object, node.changed = updated.data, updated.node, updated.object, true
|
|
node.setState(state)
|
|
return nil
|
|
}
|
|
|
|
// resetCompositeImageCrop 恢复图片原始裁剪节点，不还原后续变换和资源替换
|
|
// 入参: node 图片节点
|
|
// 返回: error 错误信息
|
|
func resetCompositeImageCrop(node *editorCompositeNode) error {
|
|
if node.object.Type != "ImageObject" {
|
|
return fmt.Errorf("composite member is not an image")
|
|
}
|
|
state := node.states[editorObjectID(node.object)]
|
|
if state.crop == nil {
|
|
return nil
|
|
}
|
|
clips := node.node.child("Clips")
|
|
var patches []editorXMLPatch
|
|
if !state.crop.exists && len(node.object.ImageObject.Clips.Clip) == len(state.crop.indexes) {
|
|
patches = append(patches, editorXMLPatch{clips.start, clips.end, nil})
|
|
} else {
|
|
count := 0
|
|
for _, child := range clips.children {
|
|
if child.name.Local == "Clip" {
|
|
if slices.Contains(state.crop.indexes, count) {
|
|
patches = append(patches, editorXMLPatch{child.start, child.end, nil})
|
|
}
|
|
count++
|
|
}
|
|
}
|
|
}
|
|
updated, err := newEditorCompositeNode(editorPatchXML(node.data, patches))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
node.data, node.node, node.object, node.changed = updated.data, updated.node, updated.object, true
|
|
state.crop = nil
|
|
node.setState(state)
|
|
return nil
|
|
}
|