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xiaoqidun committed
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7b9b961196
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22040ec836
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-132
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@@ -16,6 +16,7 @@ package ofdgo
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import (
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"fmt"
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"math"
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"slices"
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)
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@@ -37,6 +38,88 @@ func (e *Editor) SelectionBounds(page int, objects, annotations []string) (Box,
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return bounds, nil
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}
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// TransformSelection 原子变换正文与注解，失败回滚，一次撤销恢复全部
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// 入参: page 页面索引, objects 正文标识, annotations 注解标识, matrix 有限可逆变换
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// 返回: error 标识、变换或编辑错误
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func (e *Editor) TransformSelection(page int, objects, annotations []string, matrix Matrix) error {
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if _, ok := matrix.Invert(); !ok || !finite(matrix.a) || !finite(matrix.b) || !finite(matrix.c) || !finite(matrix.d) || !finite(matrix.e) || !finite(matrix.f) {
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return fmt.Errorf("selection transform must be finite and invertible")
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}
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if matrix == IdentityMatrix {
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if _, _, err := e.selectedObjects(page, objects); err != nil {
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return err
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}
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seen := make(map[string]bool, len(annotations))
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for _, id := range annotations {
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if seen[id] {
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return fmt.Errorf("duplicate annotation ID %q", id)
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}
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seen[id] = true
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if _, err := e.Annotation(page, id); 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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return e.Transaction(func(edit *Editor) error {
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if err := edit.TransformObjectsMatrix(page, objects, matrix); err != nil {
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return err
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}
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return edit.TransformAnnotations(page, annotations, matrix)
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})
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}
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// RotateSelection 绕正文与注解的共同可见范围中心旋转，保留相对位置及资源
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// 入参: page 页面索引, objects 正文标识, annotations 注解标识, degrees 顺时针角度，仅支持90度的整数倍
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// 返回: error 标识、度量或编辑错误
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func (e *Editor) RotateSelection(page int, objects, annotations []string, degrees int) error {
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matrix, err := editorRotation(degrees)
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if err != nil {
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return err
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}
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return e.orientSelection(page, objects, annotations, matrix)
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}
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// FlipSelection 绕正文与注解的共同可见范围中心镜像，保留绘制层级
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// 入参: page 页面索引, objects 正文标识, annotations 注解标识, axis 为horizontal或vertical
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// 返回: error 标识、度量或编辑错误
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func (e *Editor) FlipSelection(page int, objects, annotations []string, axis string) error {
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matrix, err := editorFlip(axis)
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if err != nil {
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return err
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}
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return e.orientSelection(page, objects, annotations, matrix)
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}
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// ResizeSelection 按共同可见范围调整正文与注解的位置及尺寸，不重排文字或重采样图片
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// 正文独立宽高遵循ResizeObjects规则，一次撤销恢复全部
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// 入参: page 页面索引, objects 正文标识, annotations 注解标识, box 页面毫米目标范围
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// 返回: error 标识、度量或编辑错误
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func (e *Editor) ResizeSelection(page int, objects, annotations []string, box Box) error {
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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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bounds, err := e.SelectionBounds(page, objects, annotations)
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if err != nil {
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return err
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}
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sx, sy := box.W/bounds.W, box.H/bounds.H
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if math.Abs(sx-sy) > 1e-9*math.Max(sx, sy) {
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items, _, err := e.selectedObjects(page, objects)
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if err != nil {
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return err
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}
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for _, object := range items {
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if !e.objectStretchable(object, make(map[string]bool)) {
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return fmt.Errorf("nonuniform resizing requires images or image-only groups")
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}
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}
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} else {
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sy = sx
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}
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return e.TransformSelection(page, objects, annotations, Matrix{a: sx, d: sy, e: box.X - bounds.X*sx, f: box.Y - bounds.Y*sy})
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}
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// AlignSelection 将正文与注解统一对齐，单选对齐页面，多选对齐选区，一次撤销恢复全部
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// 入参: page 页面索引, objects 正文标识, annotations 注解标识, alignment 为left、center、right、top、middle或bottom
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// 返回: error 标识、度量或编辑错误
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@@ -79,6 +162,104 @@ func (e *Editor) DistributeSelection(page int, objects, annotations []string, ax
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return e.transformSelection(page, objects, annotations, matrices)
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}
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// DeleteSelection 原子删除正文与注解，一次撤销恢复全部
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// 入参: page 页面索引, objects 正文标识, annotations 注解标识
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// 返回: error 标识或编辑错误
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func (e *Editor) DeleteSelection(page int, objects, annotations []string) error {
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return e.Transaction(func(edit *Editor) error {
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if err := edit.DeleteObjects(page, objects); err != nil {
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return err
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}
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return edit.DeleteAnnotations(page, annotations)
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})
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}
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// StyleSelection 原子设置正文与注解内部图元的样式，保留未指定属性
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// 入参: page 页面索引, objects 正文标识, annotations 注解标识, style 样式增量
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// 返回: error 标识、样式或编辑错误
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func (e *Editor) StyleSelection(page int, objects, annotations []string, style ObjectStyle) error {
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return e.Transaction(func(edit *Editor) error {
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if err := edit.StyleObjects(page, objects, style); err != nil {
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return err
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}
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return edit.editSelectionAnnotations(page, annotations, func(path ObjectPath, indexes []int) error {
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return edit.StyleCompositeObjects(page, path, indexes, style)
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})
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})
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}
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// EraseSelection 按页面矩形原子擦除正文与注解内部内容，不删除其他选区成员
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// 保留原始资源，不用于敏感信息脱敏
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// 入参: page 页面索引, objects 正文标识, annotations 注解标识, box 页面毫米擦除范围
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// 返回: error 标识、范围或编辑错误
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func (e *Editor) EraseSelection(page int, objects, annotations []string, box Box) error {
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return e.Transaction(func(edit *Editor) error {
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if err := edit.EraseObjects(page, objects, box); err != nil {
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return err
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}
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return edit.editSelectionAnnotations(page, annotations, func(path ObjectPath, indexes []int) error {
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return edit.EraseCompositeObjects(page, path, indexes, box)
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})
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})
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}
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// EraseSelectionPath 按页面多边形原子擦除正文与注解内部内容，不改变未擦除内容
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// 保留原始资源，不用于敏感信息脱敏
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// 入参: page 页面索引, objects 正文标识, annotations 注解标识, points 页面毫米多边形
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// 返回: error 标识、多边形或编辑错误
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func (e *Editor) EraseSelectionPath(page int, objects, annotations []string, points []Point) error {
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return e.Transaction(func(edit *Editor) error {
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if err := edit.EraseObjectsPath(page, objects, points); err != nil {
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return err
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}
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return edit.editSelectionAnnotations(page, annotations, func(path ObjectPath, indexes []int) error {
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return edit.EraseCompositeObjectsPath(page, path, indexes, points)
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})
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})
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}
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// orientSelection 将直角旋转或镜像定位到混合选区中心，恒等变换仅校验标识
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// 入参: page 页面索引, objects 正文标识, annotations 注解标识, matrix 方向变换
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// 返回: error 标识、度量或编辑错误
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func (e *Editor) orientSelection(page int, objects, annotations []string, matrix Matrix) error {
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if matrix != IdentityMatrix {
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bounds, err := e.SelectionBounds(page, objects, annotations)
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if err != nil {
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return err
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}
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x, y := bounds.X+bounds.W/2, bounds.Y+bounds.H/2
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matrix = TranslationMatrix(x, y).Multiply(matrix).Multiply(TranslationMatrix(-x, -y))
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}
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return e.TransformSelection(page, objects, annotations, matrix)
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}
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// editSelectionAnnotations 对注解直接成员统一操作，重复或不存在的标识返回错误
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// 入参: page 页面索引, ids 注解标识, apply 成员操作
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// 返回: error 标识、度量或编辑错误
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func (e *Editor) editSelectionAnnotations(page int, ids []string, apply func(ObjectPath, []int) error) error {
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seen := make(map[string]bool, len(ids))
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for _, id := range ids {
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if seen[id] {
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return fmt.Errorf("duplicate annotation ID %q", id)
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}
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seen[id] = true
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path := ObjectPath{Annotation: id}
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reader, _, _, members, err := e.compositeScope(page, path)
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if err != nil {
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return err
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}
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reader.Close()
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indexes := make([]int, len(members))
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for i := range indexes {
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indexes[i] = i
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}
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if err := apply(path, indexes); 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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// selectionGeometry 一次读取页面与资源，按正文、注解标识顺序度量并保留绘制位置
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// 入参: page 页面索引, objects 正文标识, annotations 注解标识
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// 返回: []Box 成员范围, []editorObjectPosition 绘制位置, Box 页面范围, error 标识或度量错误
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