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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,122 @@ | ||
| /* | ||
| Copyright 2024 The pdf Authors. | ||
| 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 test | ||
|
|
||
| import ( | ||
| "path/filepath" | ||
| "testing" | ||
|
|
||
| "github.com/pdfcpu/pdfcpu/pkg/api" | ||
| "github.com/pdfcpu/pdfcpu/pkg/pdfcpu" | ||
| "github.com/pdfcpu/pdfcpu/pkg/pdfcpu/types" | ||
| ) | ||
|
|
||
| func TestZoomInByFactor(t *testing.T) { | ||
| msg := "TestZoomInByFactor" | ||
|
|
||
| inFile := filepath.Join(inDir, "test.pdf") | ||
|
|
||
| zoom, err := pdfcpu.ParseZoomConfig("factor:2", types.POINTS) | ||
| if err != nil { | ||
| t.Fatalf("%s invalid zoom configuration: %v\n", msg, err) | ||
| } | ||
| outFile := filepath.Join(samplesDir, "zoom", "zoomInByFactor2.pdf") | ||
| if err := api.ZoomFile(inFile, outFile, nil, zoom, nil); err != nil { | ||
| t.Fatalf("%s zoom: %v\n", msg, err) | ||
| } | ||
|
|
||
| zoom, err = pdfcpu.ParseZoomConfig("factor:4", types.POINTS) | ||
| if err != nil { | ||
| t.Fatalf("%s invalid zoom configuration: %v\n", msg, err) | ||
| } | ||
| outFile = filepath.Join(samplesDir, "zoom", "zoomInByFactor4.pdf") | ||
| if err := api.ZoomFile(inFile, outFile, nil, zoom, nil); err != nil { | ||
| t.Fatalf("%s zoom: %v\n", msg, err) | ||
| } | ||
| } | ||
|
|
||
| func TestZoomOutByFactor(t *testing.T) { | ||
| msg := "TestZoomOutByFactor" | ||
|
|
||
| inFile := filepath.Join(inDir, "test.pdf") | ||
|
|
||
| zoom, err := pdfcpu.ParseZoomConfig("factor:.5", types.POINTS) | ||
| if err != nil { | ||
| t.Fatalf("%s invalid zoom configuration: %v\n", msg, err) | ||
| } | ||
| outFile := filepath.Join(samplesDir, "zoom", "zoomOutByFactor05.pdf") | ||
| if err := api.ZoomFile(inFile, outFile, nil, zoom, nil); err != nil { | ||
| t.Fatalf("%s zoom: %v\n", msg, err) | ||
| } | ||
|
|
||
| zoom, err = pdfcpu.ParseZoomConfig("factor:.25, border:true", types.POINTS) | ||
| if err != nil { | ||
| t.Fatalf("%s invalid zoom configuration: %v\n", msg, err) | ||
| } | ||
| outFile = filepath.Join(samplesDir, "zoom", "zoomOutByFactor025.pdf") | ||
| if err := api.ZoomFile(inFile, outFile, nil, zoom, nil); err != nil { | ||
| t.Fatalf("%s zoom: %v\n", msg, err) | ||
| } | ||
| } | ||
|
|
||
| func TestZoomOutByHorizontalMargin(t *testing.T) { | ||
| // Zoom out of page content resulting in a preferred horizontal margin. | ||
| msg := "TestZoomOutByHMargin" | ||
| inFile := filepath.Join(inDir, "test.pdf") | ||
|
|
||
| zoom, err := pdfcpu.ParseZoomConfig("hmargin:149", types.POINTS) | ||
| if err != nil { | ||
| t.Fatalf("%s invalid zoom configuration: %v\n", msg, err) | ||
| } | ||
| outFile := filepath.Join(samplesDir, "zoom", "zoomOutByHMarginPoints.pdf") | ||
| if err := api.ZoomFile(inFile, outFile, nil, zoom, nil); err != nil { | ||
| t.Fatalf("%s zoom: %v\n", msg, err) | ||
| } | ||
|
|
||
| zoom, err = pdfcpu.ParseZoomConfig("hmargin:1, border:true, bgcol:lightgray", types.CENTIMETRES) | ||
| if err != nil { | ||
| t.Fatalf("%s invalid zoom configuration: %v\n", msg, err) | ||
| } | ||
| outFile = filepath.Join(samplesDir, "zoom", "zoomOutByHMarginCm.pdf") | ||
| if err := api.ZoomFile(inFile, outFile, nil, zoom, nil); err != nil { | ||
| t.Fatalf("%s zoom: %v\n", msg, err) | ||
| } | ||
| } | ||
|
|
||
| func TestZoomOutByVerticalMargin(t *testing.T) { | ||
| // Zoom out of page content resulting in a preferred vertical margin. | ||
| msg := "TestZoomOutByVMargin" | ||
| inFile := filepath.Join(inDir, "test.pdf") | ||
|
|
||
| zoom, err := pdfcpu.ParseZoomConfig("vmargin:1", types.INCHES) | ||
| if err != nil { | ||
| t.Fatalf("%s invalid zoom configuration: %v\n", msg, err) | ||
| } | ||
| outFile := filepath.Join(samplesDir, "zoom", "zoomOutByVMarginInches.pdf") | ||
| if err := api.ZoomFile(inFile, outFile, nil, zoom, nil); err != nil { | ||
| t.Fatalf("%s zoom: %v\n", msg, err) | ||
| } | ||
|
|
||
| zoom, err = pdfcpu.ParseZoomConfig("vmargin:30, border:false, bgcol:lightgray", types.MILLIMETRES) | ||
| if err != nil { | ||
| t.Fatalf("%s invalid zoom configuration: %v\n", msg, err) | ||
| } | ||
| outFile = filepath.Join(samplesDir, "zoom", "zoomOutByVMarginMm.pdf") | ||
| if err := api.ZoomFile(inFile, outFile, nil, zoom, nil); err != nil { | ||
| t.Fatalf("%s zoom: %v\n", msg, err) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| /* | ||
| Copyright 2024 The pdfcpu Authors. | ||
| 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 api | ||
|
|
||
| import ( | ||
| "io" | ||
| "os" | ||
|
|
||
| "github.com/pdfcpu/pdfcpu/pkg/log" | ||
| "github.com/pdfcpu/pdfcpu/pkg/pdfcpu" | ||
| "github.com/pdfcpu/pdfcpu/pkg/pdfcpu/model" | ||
| "github.com/pkg/errors" | ||
| ) | ||
|
|
||
| // Zoom applies resizeConf for selected pages of rs and writes result to w. | ||
| func Zoom(rs io.ReadSeeker, w io.Writer, selectedPages []string, zoom *model.Zoom, conf *model.Configuration) error { | ||
| if rs == nil { | ||
| return errors.New("pdfcpu: Zoom: missing rs") | ||
| } | ||
|
|
||
| if conf == nil { | ||
| conf = model.NewDefaultConfiguration() | ||
| } | ||
| conf.Cmd = model.ZOOM | ||
|
|
||
| ctx, err := ReadValidateAndOptimize(rs, conf) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| pages, err := PagesForPageSelection(ctx.PageCount, selectedPages, true, true) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| if err = pdfcpu.Zoom(ctx, pages, zoom); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| return Write(ctx, w, conf) | ||
| } | ||
|
|
||
| // ZoomFile applies zoomConf for selected pages of inFile and writes result to outFile. | ||
| func ZoomFile(inFile, outFile string, selectedPages []string, zoom *model.Zoom, conf *model.Configuration) (err error) { | ||
| if log.CLIEnabled() { | ||
| log.CLI.Printf("zooming %s\n", inFile) | ||
| } | ||
|
|
||
| tmpFile := inFile + ".tmp" | ||
| if outFile != "" && inFile != outFile { | ||
| tmpFile = outFile | ||
| logWritingTo(outFile) | ||
| } else { | ||
| logWritingTo(inFile) | ||
| } | ||
|
|
||
| var ( | ||
| f1, f2 *os.File | ||
| ) | ||
|
|
||
| if f1, err = os.Open(inFile); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| if f2, err = os.Create(tmpFile); err != nil { | ||
| f1.Close() | ||
| return err | ||
| } | ||
|
|
||
| defer func() { | ||
| if err != nil { | ||
| f2.Close() | ||
| f1.Close() | ||
| os.Remove(tmpFile) | ||
| return | ||
| } | ||
| if err = f2.Close(); err != nil { | ||
| return | ||
| } | ||
| if err = f1.Close(); err != nil { | ||
| return | ||
| } | ||
| if outFile == "" || inFile == outFile { | ||
| err = os.Rename(tmpFile, inFile) | ||
| } | ||
| }() | ||
|
|
||
| if conf == nil { | ||
| conf = model.NewDefaultConfiguration() | ||
| } | ||
| conf.Cmd = model.ZOOM | ||
|
|
||
| return Zoom(f1, f2, selectedPages, zoom, conf) | ||
| } |
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