mirror of
https://github.com/xiaoqidun/ofdgo.git
synced 2026-10-29 17:27:08 +08:00
302 lines
11 KiB
Go
302 lines
11 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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"fmt"
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"maps"
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"slices"
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)
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// siblings 获取同一原始容器内的直接绘制成员，不跨越资源和页块
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// 返回: []*editorCompositeNode 按绘制顺序排列的成员
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func (n *editorCompositeNode) siblings() []*editorCompositeNode {
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var result []*editorCompositeNode
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for _, member := range n.owner.children {
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if member.span.parent == n.span.parent {
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result = append(result, member)
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}
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}
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return result
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}
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// DeleteCompositeObjects 删除内部成员，保留容器、未选对象及其他实例，一次撤销恢复全部
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// 入参: page 页面索引, path 父复合路径, indexes 成员序号
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// 返回: error 错误信息
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func (e *Editor) DeleteCompositeObjects(page int, path ObjectPath, indexes []int) error {
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return e.editCompositeObjects(page, path, indexes, func(_ *Renderer, nodes []*editorCompositeNode, _ []CompositeMember) error {
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for _, node := range nodes {
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node.owner.patches = append(node.owner.patches, editorXMLPatch{node.span.start, node.span.end, nil})
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}
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return nil
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})
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}
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// CopyCompositeObjects 在原容器末尾复制选区并按页面毫米平移，保留原文并重映射副本内部标识
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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, dx、dy 页面位移
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// 返回: []int 按绘制顺序排列的副本序号, error 错误信息
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func (e *Editor) CopyCompositeObjects(page int, path ObjectPath, indexes []int, dx, dy float64) ([]int, error) {
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if !finite(dx) || !finite(dy) {
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return nil, fmt.Errorf("copy requires finite offsets")
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}
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var result []int
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err := e.editCompositeObjects(page, path, indexes, func(renderer *Renderer, nodes []*editorCompositeNode, members []CompositeMember) error {
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container := nodes[0].span.parent
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for i, node := range nodes {
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if !members[i].Capabilities.Copy || node.span.parent != container {
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return fmt.Errorf("copy requires editable members in the same container")
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}
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}
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slices.SortFunc(nodes, func(a, b *editorCompositeNode) int { return a.index - b.index })
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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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owner := nodes[0].owner
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maps.Copy(owner.states, states)
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owner.patches = append(owner.patches, editorXMLPatch{container.close, container.close, data})
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next := 0
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for _, member := range owner.children {
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if container.start < member.span.start && member.span.end <= container.close {
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next = member.index + 1
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}
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}
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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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// copyCompositeNodes 复制成员原文并统一重映射标识，保持副本之间的引用
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// 入参: renderer 渲染器, nodes 快照, dx、dy 页面位移
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// 返回: []byte 副本XML, map[string]editorCompositeState 会话信息, error 错误信息
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func (e *Editor) copyCompositeNodes(renderer *Renderer, nodes []*editorCompositeNode, dx, dy float64) ([]byte, map[string]editorCompositeState, error) {
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ids := make(map[string]string)
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for _, node := range nodes {
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if err := e.collectCompositeIDs(node.node, ids); err != nil {
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return nil, nil, err
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}
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}
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var data []byte
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states := make(map[string]editorCompositeState)
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for _, node := range nodes {
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copy := *node
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if err := e.transformCompositeMember(renderer, ©, TranslationMatrix(dx, dy)); err != nil {
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return nil, nil, err
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}
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fragment, err := editorXMLRemapIDs(copy.data, copy.node, ids)
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if err != nil {
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return nil, nil, err
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}
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maps.Copy(states, remapCompositeStates(node.states, ids))
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data = append(data, fragment...)
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}
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return data, states, nil
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}
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// OrderCompositeObjects 调整同一直接容器内的绘制顺序，不改变页块和其他实例
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// 入参: page 页面索引, path 父复合路径, indexes 成员序号, order 为up、down、top或bottom
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// 返回: []int 调整后的选区序号, error 错误信息
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func (e *Editor) OrderCompositeObjects(page int, path ObjectPath, indexes []int, order string) ([]int, error) {
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if !slices.Contains([]string{"up", "down", "top", "bottom"}, order) {
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return nil, fmt.Errorf("invalid object order %q", order)
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}
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var result []int
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err := e.editCompositeObjects(page, path, indexes, func(_ *Renderer, nodes []*editorCompositeNode, members []CompositeMember) error {
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siblings := nodes[0].siblings()
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selected := make([]bool, len(siblings))
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for j, node := range nodes {
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i := slices.Index(siblings, node)
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if i < 0 || !members[j].Capabilities.Order {
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return fmt.Errorf("ordering requires members in the same container")
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}
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selected[i] = true
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}
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ordered := slices.Clone(siblings)
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orderEditorObjects(ordered, selected, order)
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for i, node := range siblings {
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if node != ordered[i] {
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node.owner.patches = append(node.owner.patches, editorXMLPatch{node.span.start, node.span.end, ordered[i].data})
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}
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if slices.Contains(nodes, ordered[i]) {
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result = append(result, node.index)
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}
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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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// ReplaceCompositeImage 替换内部图片数据，保留变换、裁剪、蒙版、边框和透明度
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// 入参: page 页面索引, path 父复合路径, index 图片序号, data PNG或JPEG数据
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// 返回: error 错误信息
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func (e *Editor) ReplaceCompositeImage(page int, path ObjectPath, index int, data []byte) error {
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return e.editCompositeObjects(page, path, []int{index}, func(_ *Renderer, nodes []*editorCompositeNode, _ []CompositeMember) error {
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node := nodes[0]
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if node.object.Type != "ImageObject" {
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return fmt.Errorf("composite member is not an image")
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}
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object := node.object
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id, err := e.AddImage(data)
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if err != nil {
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return err
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}
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object.ImageObject.ResourceID = id
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return node.update(object)
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})
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}
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// update 合并成员属性变化，不重写原文中未修改的字段
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// 入参: object 修改后的对象
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// 返回: error 错误信息
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func (n *editorCompositeNode) update(object GraphicObject) error {
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data, err := editorXMLObject(n.data, n.node, n.object, object)
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if err != nil || bytes.Equal(data, n.data) {
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return err
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}
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next, err := newEditorCompositeNode(data)
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if err != nil {
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return 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 nil
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}
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// Shape 获取内部基本路径的页面几何，矩形和椭圆要求轴对齐，其他成员返回空类型
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// 返回: ShapeKind 图形类型, Box 几何范围，直线使用起点及有符号端点位移
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func (m CompositeMember) Shape() (ShapeKind, Box) {
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if m.Object.Type != "PathObject" || !m.Capabilities.Transform {
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return "", Box{}
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}
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kind, box := m.Object.PathObject.Shape()
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if kind == "" {
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return "", Box{}
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}
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parent, ok := m.shapeParent()
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if !ok {
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return "", Box{}
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}
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if lineShapeKind(kind) {
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return kind, transformLineBox(box, parent)
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}
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if !axisAlignedMatrix(parent) {
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return "", Box{}
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}
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return kind, parent.TransformBox(box)
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}
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// shapeParent 获取路径所在坐标到页面的变换，兼容旧式内联边界
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// 返回: Matrix 路径父坐标变换, bool 是否可逆
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func (m CompositeMember) shapeParent() (Matrix, bool) {
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p := m.Object.PathObject
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box, _ := ParseBox(p.Boundary)
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inverse, ok := TranslationMatrix(box.X, box.Y).Multiply(NewMatrix(p.CTM)).Invert()
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return m.Matrix.Multiply(inverse), ok
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}
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// transformLineBox 变换起点及有符号端点位移
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// 入参: box 直线端点, matrix 坐标变换
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// 返回: Box 变换后的端点
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func transformLineBox(box Box, matrix Matrix) Box {
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x, y := matrix.Transform(box.X, box.Y)
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w, h := matrixVector(matrix, box.W, box.H)
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return Box{X: x, Y: y, W: w, H: h}
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}
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// ReshapeCompositeLine 修改内部直线的页面端点及箭头，保留原始属性和父变换
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// 入参: page 页面索引, path 父路径, index 成员序号, kind 直线类型, box 页面端点
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// 返回: error 错误信息
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func (e *Editor) ReshapeCompositeLine(page int, path ObjectPath, index int, kind ShapeKind, box Box) error {
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if kind != "" && !lineShapeKind(kind) {
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return fmt.Errorf("unsupported line kind %q", kind)
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}
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return e.reshapeCompositeObject(page, path, index, kind, box, true)
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}
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// ReshapeCompositeObject 调整内部基本路径的页面几何，保留绘制样式、变换与裁剪
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// 入参: page 页面索引, path 父路径, index 成员序号, box 页面范围，直线使用有符号端点位移
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// 返回: error 错误信息
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func (e *Editor) ReshapeCompositeObject(page int, path ObjectPath, index int, box Box) error {
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return e.reshapeCompositeObject(page, path, index, "", box, false)
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}
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// reshapeCompositeObject 按页面几何修改单个内部路径，可选修改箭头类型
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// 入参: page 页面索引, path 父路径, index 成员序号, kind 目标类型，空值保持原类型, box 页面几何, lineOnly 是否仅接受直线
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// 返回: error 错误信息
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func (e *Editor) reshapeCompositeObject(page int, path ObjectPath, index int, kind ShapeKind, box Box, lineOnly bool) error {
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return e.editCompositeObjects(page, path, []int{index}, func(_ *Renderer, nodes []*editorCompositeNode, members []CompositeMember) error {
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before, geometry := members[0].Shape()
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if before == "" || lineOnly && !lineShapeKind(before) {
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return fmt.Errorf("composite member is not a supported shape")
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}
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if kind == "" {
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kind = before
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}
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if kind == before && geometry == box {
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return nil
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}
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node := nodes[0]
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inverse, _ := node.parent.Invert()
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object := cloneEditorData(node.object)
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if !node.boundaryInCTM {
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object = compositeBoundary(object, node.parent, true)
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}
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var err error
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if lineShapeKind(kind) {
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object.PathObject, err = object.PathObject.ReshapeLine(kind, transformLineBox(box, inverse))
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} else {
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if _, err := creationBox(editorBoxString(box)); err != nil {
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return err
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}
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object.PathObject, err = object.PathObject.Reshape(inverse.TransformBox(box))
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}
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if err != nil {
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return err
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}
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if !node.boundaryInCTM {
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object = compositeBoundary(object, node.parent, false)
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}
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object.PathObject.Clips = node.object.PathObject.Clips
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return node.update(object)
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})
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}
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// collectCompositeIDs 为已校验副本中的标准标识分配新值，拒绝重复标识
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// 入参: node 原节点, ids 原标识与新标识
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// 返回: error 错误信息
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func (e *Editor) collectCompositeIDs(node *editorXML, ids map[string]string) error {
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if id := editorResourceID(node.attr("ID")); id != "" {
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if ids[id] != "" {
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return fmt.Errorf("duplicate object ID %q", id)
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}
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ids[id] = e.nextID()
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}
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for _, child := range node.children {
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if err := e.collectCompositeIDs(child, ids); err != nil {
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return err
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}
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}
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return nil
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}
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