mirror of
https://github.com/xiaoqidun/ofdgo.git
synced 2026-10-29 17:27:08 +08:00
499 lines
17 KiB
Go
499 lines
17 KiB
Go
// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ofdgo
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import (
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"bytes"
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"encoding/xml"
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"fmt"
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"maps"
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"slices"
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)
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// CompositeSelection 同一内部容器的独立选区快照，共享不可变字体和图片资源
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// 可在当前Editor内粘贴，源对象修改或删除不改变快照，不用于跨文档交换
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// 父路径的祖先成员增删或排序后需重新捕获，避免使用已失效的序号路径
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type CompositeSelection struct {
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editor *Editor
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document editorDocumentIdentity
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page string
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path ObjectPath
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references int
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containers []int
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nodes []*editorCompositeNode
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source *editorSourcePage
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}
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// PasteCompositeSelection 将内部对象快照粘贴到页面顶层，保持嵌套结构、源继承外观和裁剪
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// 入参: page 目标页, selection 当前编辑器内捕获的快照, dx 页面横向位移, dy 页面纵向位移
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// 返回: []string 新对象标识, error 错误信息
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func (e *Editor) PasteCompositeSelection(page int, selection *CompositeSelection, dx, dy float64) ([]string, error) {
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if !finite(dx) || !finite(dy) {
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return nil, fmt.Errorf("paste requires finite offsets")
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}
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if _, err := e.page(page); err != nil {
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return nil, err
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}
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var result []string
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err := e.pasteCompositeSelection(selection, func(objects []GraphicObject, _ []map[string]string) error {
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var err error
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result, err = e.CopyObjects(page, objects, dx, dy)
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return err
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})
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return result, err
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}
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// CaptureCompositeObjects 捕获内部选区，不修改文档或分配资源
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// 入参: page 页面索引, path 父复合路径, indexes 同一容器的成员序号
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// 返回: *CompositeSelection 独立快照, error 错误信息
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func (e *Editor) CaptureCompositeObjects(page int, path ObjectPath, indexes []int) (*CompositeSelection, error) {
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reader, _, root, nodes, err := e.compositeScope(page, path)
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if err != nil {
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return nil, err
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}
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defer reader.Close()
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if len(indexes) == 0 {
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return nil, fmt.Errorf("composite selection is empty")
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}
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indexes = slices.Clone(indexes)
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slices.Sort(indexes)
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var owner *editorCompositeNode
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var container *editorXML
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selection := &CompositeSelection{editor: e, document: e.documentIdentity(), page: e.pages[page].ID, path: ObjectPath{ID: path.ID, Annotation: path.Annotation, Children: slices.Clone(path.Children)}}
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if path.Annotation == "" {
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selection.source = e.objectOrigin(path.ID).page
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} else if e.source != nil {
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selection.source = e.source.pages[e.pages[page].ID]
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}
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for j, i := range indexes {
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if i < 0 || i >= len(nodes) || j > 0 && indexes[j-1] == i {
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return nil, fmt.Errorf("invalid composite copy selection")
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}
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node := nodes[i]
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if !node.transformable() || !editorXMLCopyable(node.node) {
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return nil, fmt.Errorf("composite member cannot be copied")
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}
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if j == 0 {
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owner, container = node.owner, node.span.parent
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} else if node.span.parent != container {
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return nil, fmt.Errorf("copy requires members in the same container")
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}
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copy := *node
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copy.owner, copy.span = nil, nil
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selection.nodes = append(selection.nodes, ©)
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}
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scope := root.loadedScope(path.Children)
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for scope != owner {
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scope = scope.ref
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selection.references++
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}
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for node := container; node != owner.node; node = node.parent {
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containers := compositeContainers(node.parent)
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selection.containers = append(selection.containers, slices.Index(containers, node))
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}
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slices.Reverse(selection.containers)
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return selection, nil
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}
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// PasteCompositeObjects 将快照粘贴至内部范围末尾，不依赖源成员当前的序号或存在性
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// 同范围沿用原容器和当前继承样式，跨范围固定对象的源外观，位移使用页面毫米
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// 目标范围的父透明度及裁剪仍作用于新成员，全部成员提交一次撤销记录
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// 入参: page 页面索引, path 父复合路径, selection 捕获的快照, dx 页面横向位移, dy 页面纵向位移
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// 返回: []int 新成员序号, error 错误信息
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func (e *Editor) PasteCompositeObjects(page int, path ObjectPath, selection *CompositeSelection, dx, dy float64) ([]int, error) {
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if selection == nil || selection.editor != e || !e.documentIdentity().matches(selection.document) {
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return nil, fmt.Errorf("composite selection belongs to another document or editor")
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}
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if !finite(dx) || !finite(dy) {
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return nil, fmt.Errorf("paste requires finite offsets")
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}
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if _, err := e.page(page); err != nil {
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return nil, err
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}
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if e.pages[page].ID != selection.page || path.ID != selection.path.ID || path.Annotation != selection.path.Annotation || !slices.Equal(path.Children, selection.path.Children) {
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var result []int
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err := e.pasteCompositeSelection(selection, func(objects []GraphicObject, _ []map[string]string) error {
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var err error
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result, err = e.CopyObjectsToComposite(page, path, objects, dx, dy)
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return err
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})
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return result, err
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}
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var result []int
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err := e.editCompositeScope(page, path, func(renderer *Renderer, root *editorCompositeNode, _ []*editorCompositeNode) error {
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scope := root.loadedScope(path.Children)
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owner := scope
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for i := 0; i < selection.references; i++ {
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owner = owner.ref
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if owner == nil {
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return fmt.Errorf("composite resource container no longer exists")
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}
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}
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container := owner.node
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for _, index := range selection.containers {
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containers := compositeContainers(container)
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if index >= len(containers) {
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return fmt.Errorf("composite page block no longer exists")
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}
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container = containers[index]
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}
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box, _ := ParseBox(owner.object.CompositeGraphicUnit.Boundary)
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parent := owner.parent.Multiply(TranslationMatrix(box.X, box.Y)).Multiply(NewMatrix(owner.object.CompositeGraphicUnit.CTM))
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nodes := make([]*editorCompositeNode, len(selection.nodes))
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for i, node := range selection.nodes {
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copy := *node
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copy.parent, copy.boundaryInCTM = parent, owner.boundaryInCTM
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nodes[i] = ©
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}
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data, states, err := e.copyCompositeNodes(renderer, nodes, dx, dy)
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if err != nil {
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return err
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}
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maps.Copy(owner.states, states)
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next, reached := 0, false
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var count func(*editorCompositeNode)
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count = func(node *editorCompositeNode) {
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if node.ref != nil {
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count(node.ref)
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}
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if reached {
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return
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}
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for _, child := range node.children {
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if node != owner || child.span.start < container.close {
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next++
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}
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}
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reached = node == owner
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}
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count(scope)
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patch := editorXMLPatch{container.close, container.close, data}
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if container.open == container.end {
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patch = editorXMLContent(owner.data, container, data)
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}
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owner.patches = append(owner.patches, patch)
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for i := range nodes {
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result = append(result, next+i)
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}
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return nil
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})
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if err != nil {
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return nil, err
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}
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return result, nil
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}
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// pasteCompositeSelection 固定内部快照的页面几何和外观，粘贴失败时回收新增绘制资源
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// 入参: selection 独立内部快照, paste 目标范围粘贴操作
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// 返回: error 错误信息
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func (e *Editor) pasteCompositeSelection(selection *CompositeSelection, paste func([]GraphicObject, []map[string]string) error) (err error) {
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if selection == nil || selection.editor != e || !e.documentIdentity().matches(selection.document) {
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return fmt.Errorf("composite selection belongs to another document or editor")
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}
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count, maximum := len(e.resources), e.maxID
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ready := e.source != nil && e.source.idsReady
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defer func() {
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if err != nil {
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clear(e.resources[count:])
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e.resources, e.maxID = e.resources[:count], maximum
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if e.source != nil {
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e.source.idsReady = ready
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}
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}
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}()
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if err := e.prepareSourceIDs(); err != nil {
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return err
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}
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reader, err := e.Reader()
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if err != nil {
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return err
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}
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defer reader.Close()
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renderer := e.newRenderer(reader)
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var objects []GraphicObject
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var remaps []map[string]string
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for _, source := range selection.nodes {
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copy, err := newEditorCompositeNode(source.data)
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if err != nil {
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return err
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}
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style, styleErr := e.compositeMemberStyle(source)
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if styleErr != nil {
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if source.object.Type != "PathObject" || editReason(styleErr) != EditUnsupportedColor {
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return styleErr
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}
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copy.setStates(source.states)
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copy.defaults = source.defaults
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if !source.boundaryInCTM {
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if err := copy.convertCoordinates(source.parent, true); err != nil {
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return err
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}
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}
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copy, err = e.wrapCompositePath(renderer, copy)
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if err != nil {
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return err
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}
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}
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copy.setStates(source.states)
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copy.defaults = source.defaults
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copy.drawParams = source.drawParams
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object := cloneEditorData(copy.object)
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if styleErr == nil && object.Type != "PathObject" {
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object = style
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}
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object = mergeGraphicObjectAlpha(object, source.alpha)
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if !source.visible || source.clip != nil && len(*source.clip) == 0 {
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visible := false
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switch object.Type {
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case "TextObject":
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object.TextObject.Visible = &visible
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case "PathObject":
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object.PathObject.Visible = &visible
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case "ImageObject":
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object.ImageObject.Visible = &visible
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case "CompositeObject", "CompositeGraphicUnit":
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object.CompositeGraphicUnit.Visible = &visible
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}
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}
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if err := copy.update(object); err != nil {
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return err
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}
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if !source.boundaryInCTM && styleErr == nil {
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if err := copy.convertCoordinates(source.parent, true); err != nil {
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return err
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}
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}
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preserved, err := copy.preserveActionRegions(source.parent)
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if err != nil {
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return err
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}
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if !preserved {
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wrapped, err := e.vectorInstance(renderer, []*editorCompositeNode{copy})
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if err != nil {
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return err
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}
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wrapped.setStates(copy.states)
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wrapped.defaults, wrapped.drawParams = copy.defaults, copy.drawParams
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copy = wrapped
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}
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copy.parent, copy.boundaryInCTM = IdentityMatrix, true
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if err := e.transformCompositeMember(renderer, copy, source.parent); err != nil {
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return err
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}
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if err := e.isolateCompositeStyle(copy); err != nil {
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return err
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}
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if source.clip != nil && len(*source.clip) != 0 {
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shape, err := geometryClipPath(*source.clip)
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if err != nil {
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return err
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}
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clips := *editorObjectClips(©.object)
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matrix, ok := copy.matrix(clips.usesObjectMatrix()).Invert()
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if !ok {
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return fmt.Errorf("composite clip transform is not invertible")
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}
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if err := appendCompositeClip(copy, shape, matrix, false); err != nil {
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return err
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}
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}
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if copy.object.Type == "CompositeObject" || copy.object.Type == "CompositeGraphicUnit" {
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if err := copy.convertCoordinates(IdentityMatrix, false); err != nil {
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return err
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}
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}
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copy.node.parent = &editorXML{name: xml.Name{Local: "Layer"}, parent: &editorXML{name: xml.Name{Local: "Content"}}}
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object, err = e.copiedObjectStyle(copy.object, "")
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if err != nil {
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return err
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}
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object.state = copy.states[editorObjectID(copy.object)]
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object.TextObject.layout = object.state.layout
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copy.object.TextObject.layout = object.TextObject.layout
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if object.Type == "CompositeObject" || object.Type == "CompositeGraphicUnit" {
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object.CompositeGraphicUnit.states = maps.Clone(copy.states)
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copy.object.CompositeGraphicUnit.states = object.CompositeGraphicUnit.states
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}
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object.origin = &editorObjectOrigin{editor: e, document: e.documentIdentity(), page: selection.source, data: copy.data, node: copy.node, object: copy.object}
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objects = append(objects, object)
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remaps = append(remaps, copy.remaps...)
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}
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return paste(objects, remaps)
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}
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// preserveActionRegions 将默认点击范围固定到对象坐标，保留动作原文及显式区域
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// 入参: matrix 即将合入对象的父级变换
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// 返回: bool 是否可直接表示，否则需保留容器, error 错误信息
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func (n *editorCompositeNode) preserveActionRegions(matrix Matrix) (bool, error) {
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actions := n.node.child("Actions")
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if actions == nil {
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return true, nil
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}
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boundary, ctm := editorGeometry(n.object)
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if n.object.Type == "ImageObject" && ctm == "" && (matrix.a != 1 || matrix.b != 0 || matrix.c != 0 || matrix.d != 1) {
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return false, nil
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}
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if axisAlignedMatrix(matrix) {
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return true, nil
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}
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var targets []*editorXML
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for _, action := range actions.children {
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if !action.matchesOFD("Action") {
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continue
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}
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if action.attr("Event") == "CLICK" && action.child("Region") == nil {
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targets = append(targets, action)
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}
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}
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if len(targets) == 0 {
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return true, nil
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}
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box, err := creationBox(boundary)
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if err != nil {
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return false, err
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}
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inverse, ok := NewMatrix(ctm).Invert()
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if !ok {
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return false, nil
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}
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points := [4]Point{{}, {X: box.W}, {X: box.W, Y: box.H}, {Y: box.H}}
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var values [4]string
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for i, point := range points {
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x, y := inverse.Transform(point.X, point.Y)
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if !finite(x) || !finite(y) {
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return false, nil
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}
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values[i] = ofdNumber(x) + " " + ofdNumber(y)
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}
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region, err := encodeOFDXML(func(x *ofdXML) {
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x.root("Region", nil)
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x.start("Area", ofdAttrs{{Name: xml.Name{Local: "Start"}, Value: values[0]}})
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for _, point := range values[1:] {
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x.start("Line", ofdAttrs{{Name: xml.Name{Local: "Point1"}, Value: point}})
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x.end("Line")
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}
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x.start("Close", nil)
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x.end("Close")
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x.end("Area")
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x.end("Region")
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})
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if err != nil {
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return false, err
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}
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region = bytes.TrimPrefix(region, []byte(xml.Header))
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patches := make([]editorXMLPatch, 0, len(targets))
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for _, target := range targets {
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patch := editorXMLPatch{target.open, target.open, region}
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if target.open == target.end {
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patch = editorXMLContent(n.data, target, region)
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}
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patches = append(patches, patch)
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}
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data := editorPatchXML(n.data, patches)
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next, err := newEditorCompositeNode(data)
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if err != nil {
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return false, err
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}
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n.data, n.node, n.object, n.changed = data, next.node, next.object, true
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return true, nil
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}
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// convertCoordinates 转换内联基本成员的边界约定，引用资源保持标准局部坐标
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// 入参: parent 所在范围矩阵, inward 是否转换到随父变换的坐标
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// 返回: error 错误信息
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func (n *editorCompositeNode) convertCoordinates(parent Matrix, inward bool) error {
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if n.object.Type != "CompositeObject" && n.object.Type != "CompositeGraphicUnit" {
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return n.update(compositeBoundary(n.object, parent, inward))
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}
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var patches []editorXMLPatch
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var visit func(*editorXML, Matrix) error
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visit = func(node *editorXML, matrix Matrix) error {
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if node.name.Local == "CompositeObject" || node.name.Local == "CompositeGraphicUnit" {
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box, _ := ParseBox(node.attr("Boundary"))
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matrix = matrix.Multiply(TranslationMatrix(box.X, box.Y)).Multiply(NewMatrix(node.attr("CTM")))
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if _, ok := matrix.Invert(); !ok {
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return fmt.Errorf("composite copy requires invertible transforms")
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}
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}
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for _, child := range node.children {
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if classifyOFDNamespace(child.name.Space) == ofdXMLUnknown {
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continue
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}
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switch child.name.Local {
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case "Content", "PageBlock", "CompositeObject", "CompositeGraphicUnit":
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if err := visit(child, matrix); err != nil {
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return err
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}
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case "TextObject", "PathObject", "ImageObject":
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data, err := editorXMLStandalone(n.data[child.start:child.end], child)
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if err != nil {
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return err
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}
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member, err := newEditorCompositeNode(data)
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if err != nil {
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return err
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}
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if err := member.update(compositeBoundary(cloneEditorData(member.object), matrix, inward)); err != nil {
|
|
return err
|
|
}
|
|
patches = append(patches, editorXMLPatch{child.start, child.end, member.data})
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
if err := visit(n.node, parent); err != nil {
|
|
return err
|
|
}
|
|
data := editorPatchXML(n.data, patches)
|
|
next, err := newEditorCompositeNode(data)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
n.data, n.node, n.object = data, next.node, next.object
|
|
return nil
|
|
}
|
|
|
|
// loadedScope 获取已由compositeScope展开并校验的范围
|
|
// 入参: path 逐层成员序号
|
|
// 返回: *editorCompositeNode 范围节点
|
|
func (n *editorCompositeNode) loadedScope(path []int) *editorCompositeNode {
|
|
for _, index := range path {
|
|
var nodes []*editorCompositeNode
|
|
var collect func(*editorCompositeNode)
|
|
collect = func(node *editorCompositeNode) {
|
|
if node.ref != nil {
|
|
collect(node.ref)
|
|
}
|
|
nodes = append(nodes, node.children...)
|
|
}
|
|
collect(n)
|
|
n = nodes[index]
|
|
}
|
|
return n
|
|
}
|
|
|
|
// compositeContainers 获取直接内容容器，序号不随绘制成员增删变化
|
|
// 入参: node 父节点
|
|
// 返回: []*editorXML 内容容器与页块
|
|
func compositeContainers(node *editorXML) []*editorXML {
|
|
var result []*editorXML
|
|
for _, child := range node.children {
|
|
if (child.name.Local == "Content" || child.name.Local == "PageBlock") && classifyOFDNamespace(child.name.Space) != ofdXMLUnknown {
|
|
result = append(result, child)
|
|
}
|
|
}
|
|
return result
|
|
}
|