Adds side-by-side diff for images

modules/git/commit.go

@@ -1,5 +1,5 @@
 // Copyright 2015 The Gogs Authors. All rights reserved.
-// Copyright 2018 The Gitea Authors. All rights reserved.
+// Copyright 2019 The Gitea Authors. All rights reserved.
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
@@ -10,6 +10,11 @@ import (
 	"bytes"
 	"container/list"
 	"fmt"
+	"image"
+	"image/color"
+	_ "image/gif"  // for processing gif images
+	_ "image/jpeg" // for processing jpeg images
+	_ "image/png"  // for processing png images
 	"io"
 	"net/http"
 	"strconv"
@@ -158,6 +163,42 @@ func (c *Commit) IsImageFile(name string) bool {
 	return isImage
 }
 
+// ImageMetaData represents metadata of an image file
+type ImageMetaData struct {
+	ColorModel color.Model
+	Width      int
+	Height     int
+	ByteSize   int64
+}
+
+// ImageInfo returns information about the dimensions of an image
+func (c *Commit) ImageInfo(name string) (*ImageMetaData, error) {
+	if !c.IsImageFile(name) {
+		return nil, nil
+	}
+
+	blob, err := c.GetBlobByPath(name)
+	if err != nil {
+		return nil, err
+	}
+	reader, err := blob.DataAsync()
+	if err != nil {
+		return nil, err
+	}
+	config, _, err := image.DecodeConfig(reader)
+	if err != nil {
+		return nil, err
+	}
+
+	metadata := ImageMetaData{
+		ColorModel: config.ColorModel,
+		Width:      config.Width,
+		Height:     config.Height,
+		ByteSize:   blob.Size(),
+	}
+	return &metadata, nil
+}
+
 // GetCommitByPath return the commit of relative path object.
 func (c *Commit) GetCommitByPath(relpath string) (*Commit, error) {
 	return c.repo.getCommitByPathWithID(c.ID, relpath)

options/locale/locale_en-US.ini

@@ -1293,6 +1293,11 @@ diff.whitespace_ignore_at_eol = Ignore changes in whitespace at EOL
 diff.stats_desc = <strong> %d changed files</strong> with <strong>%d additions</strong> and <strong>%d deletions</strong>
 diff.bin = BIN
 diff.view_file = View File
+diff.file_before = Before
+diff.file_after = After
+diff.file_image_width = Width
+diff.file_image_height = Height
+diff.file_byte_size = File Size
 diff.file_suppressed = File diff suppressed because it is too large
 diff.too_many_files = Some files were not shown because too many files changed in this diff
 diff.comment.placeholder = Leave a comment

public/less/_base.less

@@ -499,6 +499,37 @@ pre, code {
         }
     }
 
+    .border {
+        border: 1px solid;
+        &.red {
+            border-color: #d95c5c !important;
+        }
+        &.blue {
+            border-color: #428bca !important;
+        }
+        &.black {
+            border-color: #444;
+        }
+        &.grey {
+            border-color: #767676 !important;
+        }
+        &.light.grey {
+            border-color: #888 !important;
+        }
+        &.green {
+            border-color: #6cc644 !important;
+        }
+        &.purple {
+            border-color: #6e5494 !important;
+        }
+        &.yellow {
+            border-color: #FBBD08 !important;
+        }
+        &.gold {
+            border-color: #a1882b !important;
+        }
+    }
+
     .branch-tag-choice {
         line-height: 20px;
     }

public/less/_repository.less

@@ -1139,6 +1139,9 @@
                         // halfwidth is used in split view - and in that case, 1% of each
                         width: 49%;
                     }
+                    td.center {
+                        text-align: center;
+                    }
 
                     &.tag-code td, td.tag-code {
                         background-color: #F0F0F0 !important;

routers/repo/commit.go

@@ -238,6 +238,23 @@ func Diff(ctx *context.Context) {
 	ctx.Data["Username"] = userName
 	ctx.Data["Reponame"] = repoName
 	ctx.Data["IsImageFile"] = commit.IsImageFile
+	ctx.Data["ImageInfo"] = func(name string) *git.ImageMetaData {
+		result, err := commit.ImageInfo(name)
+		if err != nil {
+			log.Error("ImageInfo failed: %v", err)
+			return nil
+		}
+		return result
+	}
+	ctx.Data["ImageInfoBase"] = ctx.Data["ImageInfo"]
+	if commit.ParentCount() > 0 {
+		parentCommit, err := ctx.Repo.GitRepo.GetCommit(parents[0])
+		if err != nil {
+			ctx.NotFound("GetParentCommit", err)
+			return
+		}
+		ctx.Data["ImageInfo"] = parentCommit.ImageInfo
+	}
 	ctx.Data["Title"] = commit.Summary() + " · " + base.ShortSha(commitID)
 	ctx.Data["Commit"] = commit
 	ctx.Data["Verification"] = models.ParseCommitWithSignature(commit)
@@ -246,10 +263,11 @@ func Diff(ctx *context.Context) {
 	ctx.Data["Parents"] = parents
 	ctx.Data["DiffNotAvailable"] = diff.NumFiles() == 0
 	ctx.Data["SourcePath"] = setting.AppSubURL + "/" + path.Join(userName, repoName, "src", "commit", commitID)
+	ctx.Data["RawPath"] = setting.AppSubURL + "/" + path.Join(userName, repoName, "raw", "commit", commitID)
 	if commit.ParentCount() > 0 {
 		ctx.Data["BeforeSourcePath"] = setting.AppSubURL + "/" + path.Join(userName, repoName, "src", "commit", parents[0])
+		ctx.Data["BeforeRawPath"] = setting.AppSubURL + "/" + path.Join(userName, repoName, "raw", "commit", parents[0])
 	}
-	ctx.Data["RawPath"] = setting.AppSubURL + "/" + path.Join(userName, repoName, "raw", "commit", commitID)
 	ctx.Data["BranchName"], err = commit.GetBranchName()
 	ctx.HTML(200, tplDiff)
 }
@@ -276,6 +294,12 @@ func CompareDiff(ctx *context.Context) {
 	beforeCommitID := ctx.Params(":before")
 	afterCommitID := ctx.Params(":after")
 
+	beforeCommit, err := ctx.Repo.GitRepo.GetCommit(beforeCommitID)
+	if err != nil {
+		ctx.NotFound("GetCommit", err)
+		return
+	}
+
 	commit, err := ctx.Repo.GitRepo.GetCommit(afterCommitID)
 	if err != nil {
 		ctx.NotFound("GetCommit", err)
@@ -307,6 +331,22 @@ func CompareDiff(ctx *context.Context) {
 	ctx.Data["Username"] = userName
 	ctx.Data["Reponame"] = repoName
 	ctx.Data["IsImageFile"] = commit.IsImageFile
+	ctx.Data["ImageInfo"] = func(name string) *git.ImageMetaData {
+		result, err := commit.ImageInfo(name)
+		if err != nil {
+			log.Error("ImageInfo failed: %v", err)
+			return nil
+		}
+		return result
+	}
+	ctx.Data["ImageInfo"] = func(name string) *git.ImageMetaData {
+		result, err := beforeCommit.ImageInfo(name)
+		if err != nil {
+			log.Error("ImageInfo failed: %v", err)
+			return nil
+		}
+		return result
+	}
 	ctx.Data["Title"] = "Comparing " + base.ShortSha(beforeCommitID) + "..." + base.ShortSha(afterCommitID) + " · " + userName + "/" + repoName
 	ctx.Data["Commit"] = commit
 	ctx.Data["Diff"] = diff

routers/repo/pull.go

@@ -1,4 +1,4 @@
-// Copyright 2018 The Gitea Authors.
+// Copyright 2019 The Gitea Authors.
 // Copyright 2014 The Gogs Authors.
 // All rights reserved.
 // Use of this source code is governed by a MIT-style
@@ -510,16 +510,41 @@ func ViewPullFiles(ctx *context.Context) {
 	ctx.Data["Diff"] = diff
 	ctx.Data["DiffNotAvailable"] = diff.NumFiles() == 0
 
+	baseCommit, err := ctx.Repo.GitRepo.GetCommit(startCommitID)
+	if err != nil {
+		ctx.ServerError("GetCommit", err)
+		return
+	}
 	commit, err := gitRepo.GetCommit(endCommitID)
 	if err != nil {
 		ctx.ServerError("GetCommit", err)
 		return
 	}
 
 	ctx.Data["IsImageFile"] = commit.IsImageFile
+	ctx.Data["ImageInfoBase"] = func(name string) *git.ImageMetaData {
+		result, err := baseCommit.ImageInfo(name)
+		if err != nil {
+			log.Error("ImageInfo failed: %v", err)
+			return nil
+		}
+		return result
+	}
+	ctx.Data["ImageInfo"] = func(name string) *git.ImageMetaData {
+		result, err := commit.ImageInfo(name)
+		if err != nil {
+			log.Error("ImageInfo failed: %v", err)
+			return nil
+		}
+		return result
+	}
+
+	baseTarget := path.Join(ctx.Repo.Owner.Name, ctx.Repo.Repository.Name)
 	ctx.Data["SourcePath"] = setting.AppSubURL + "/" + path.Join(headTarget, "src", "commit", endCommitID)
-	ctx.Data["BeforeSourcePath"] = setting.AppSubURL + "/" + path.Join(headTarget, "src", "commit", startCommitID)
 	ctx.Data["RawPath"] = setting.AppSubURL + "/" + path.Join(headTarget, "raw", "commit", endCommitID)
+	ctx.Data["BeforeSourcePath"] = setting.AppSubURL + "/" + path.Join(baseTarget, "src", "commit", startCommitID)
+	ctx.Data["BeforeRawPath"] = setting.AppSubURL + "/" + path.Join(baseTarget, "raw", "commit", startCommitID)
+
 	ctx.Data["RequireHighlightJS"] = true
 	ctx.Data["RequireTribute"] = true
 	if ctx.Data["Assignees"], err = ctx.Repo.Repository.GetAssignees(); err != nil {
@@ -759,7 +784,6 @@ func PrepareCompareDiff(
 	baseBranch, headBranch string) bool {
 
 	var (
-		repo  = ctx.Repo.Repository
 		err   error
 		title string
 	)
@@ -789,6 +813,12 @@ func PrepareCompareDiff(
 	ctx.Data["Diff"] = diff
 	ctx.Data["DiffNotAvailable"] = diff.NumFiles() == 0
 
+	startCommitID := prInfo.MergeBase
+	baseCommit, err := ctx.Repo.GitRepo.GetCommit(startCommitID)
+	if err != nil {
+		ctx.ServerError("GetCommit", err)
+		return false
+	}
 	headCommit, err := headGitRepo.GetCommit(headCommitID)
 	if err != nil {
 		ctx.ServerError("GetCommit", err)
@@ -817,11 +847,29 @@ func PrepareCompareDiff(
 	ctx.Data["Username"] = headUser.Name
 	ctx.Data["Reponame"] = headRepo.Name
 	ctx.Data["IsImageFile"] = headCommit.IsImageFile
+	ctx.Data["ImageInfoBase"] = func(name string) *git.ImageMetaData {
+		result, err := baseCommit.ImageInfo(name)
+		if err != nil {
+			log.Error("ImageInfo failed: %v", err)
+			return nil
+		}
+		return result
+	}
+	ctx.Data["ImageInfo"] = func(name string) *git.ImageMetaData {
+		result, err := headCommit.ImageInfo(name)
+		if err != nil {
+			log.Error("ImageInfo failed: %v", err)
+			return nil
+		}
+		return result
+	}
 
-	headTarget := path.Join(headUser.Name, repo.Name)
+	headTarget := path.Join(headUser.Name, headRepo.Name)
+	baseTarget := path.Join(ctx.Repo.Owner.Name, ctx.Repo.Repository.Name)
 	ctx.Data["SourcePath"] = setting.AppSubURL + "/" + path.Join(headTarget, "src", "commit", headCommitID)
-	ctx.Data["BeforeSourcePath"] = setting.AppSubURL + "/" + path.Join(headTarget, "src", "commit", prInfo.MergeBase)
 	ctx.Data["RawPath"] = setting.AppSubURL + "/" + path.Join(headTarget, "raw", "commit", headCommitID)
+	ctx.Data["BeforeSourcePath"] = setting.AppSubURL + "/" + path.Join(baseTarget, "src", "commit", prInfo.MergeBase)
+	ctx.Data["BeforeRawPath"] = setting.AppSubURL + "/" + path.Join(baseTarget, "raw", "commit", startCommitID)
 	return false
 }
 

templates/repo/diff/box.tmpl

@@ -107,14 +107,12 @@
 				<div class="ui attached unstackable table segment">
 					{{if ne $file.Type 4}}
 						{{$isImage := (call $.IsImageFile $file.Name)}}
-						{{if and $isImage}}
-							<div class="center">
-								<img src="{{$.RawPath}}/{{EscapePound .Name}}">
-							</div>
-						{{else}}
-							<div class="file-body file-code code-view code-diff {{if $.IsSplitStyle}}code-diff-split{{else}}code-diff-unified{{end}}">
-								<table>
-									<tbody>
+						<div class="file-body file-code code-view code-diff {{if $.IsSplitStyle}}code-diff-split{{else}}code-diff-unified{{end}}">
+							<table>
+								<tbody>
+									{{if $isImage}}
+										{{template "repo/diff/image_diff" dict "file" . "root" $}}
+									{{else}}
 										{{if $.IsSplitStyle}}
 											{{$highlightClass := $file.GetHighlightClass}}
 											{{range $j, $section := $file.Sections}}
@@ -175,10 +173,10 @@
 										{{else}}
 											{{template "repo/diff/section_unified" dict "file" . "root" $}}
 										{{end}}
-									</tbody>
-								</table>
-							</div>
-						{{end}}
+									{{end}}
+								</tbody>
+							</table>
+						</div>
 					{{end}}
 				</div>
 			</div>

templates/repo/diff/image_diff.tmpl

@@ -0,0 +1,43 @@
+{{ $imagePathOld := printf "%s/%s" .root.BeforeRawPath (EscapePound .file.OldName)  }}
+{{ $imagePathNew := printf "%s/%s" .root.RawPath (EscapePound .file.Name)  }}
+
+<tr>
+ 	<th class="halfwidth center">
+ 		{{.root.i18n.Tr "repo.diff.file_before"}}
+ 	</th>
+ 	<th class="halfwidth center">
+ 		{{.root.i18n.Tr "repo.diff.file_after"}}
+ 	</th>
+</tr>
+<tr>
+ 	<td class="halfwidth center">
+ 		<a href="{{$imagePathOld}}" target="_blank">
+ 			<img src="{{$imagePathOld}}" class="border red" />
+ 		</a>
+ 	</td>
+ 	<td class="halfwidth center">
+ 		<a href="{{$imagePathNew}}" target="_blank">
+ 			<img src="{{$imagePathNew}}" class="border green" />
+ 		</a>
+ 	</td>
+</tr>
+{{ $imageInfoBase := (call .root.ImageInfoBase .file.OldName) }}
+{{ $imageInfoHead := (call .root.ImageInfo .file.Name) }}
+{{if and $imageInfoBase $imageInfoHead }}
+<tr>
+ 	<td class="halfwidth center">
+ 		{{.root.i18n.Tr "repo.diff.file_image_width"}}: <span class="text {{if not (eq $imageInfoBase.Width $imageInfoHead.Width)}}red{{end}}">{{$imageInfoBase.Width}}</span>
+ 		&nbsp;|&nbsp;
+ 	    {{.root.i18n.Tr "repo.diff.file_image_height"}}: <span class="text {{if not (eq $imageInfoBase.Height $imageInfoHead.Height)}}red{{end}}">{{$imageInfoBase.Height}}</span>
+ 		&nbsp;|&nbsp;
+ 	    {{.root.i18n.Tr "repo.diff.file_byte_size"}}: <span class="text {{if not (eq $imageInfoBase.ByteSize $imageInfoHead.ByteSize)}}red{{end}}">{{FileSize $imageInfoBase.ByteSize}}</span>
+ 	</td>
+ 	<td class="halfwidth center">
+ 		{{.root.i18n.Tr "repo.diff.file_image_width"}}: <span class="text {{if not (eq $imageInfoBase.Width $imageInfoHead.Width)}}green{{end}}">{{$imageInfoHead.Width}}</span>
+ 		&nbsp;|&nbsp;
+ 	    {{.root.i18n.Tr "repo.diff.file_image_height"}}: <span class="text {{if not (eq $imageInfoBase.Height $imageInfoHead.Height)}}green{{end}}">{{$imageInfoHead.Height}}</span>
+ 		&nbsp;|&nbsp;
+ 	    {{.root.i18n.Tr "repo.diff.file_byte_size"}}: <span class="text {{if not (eq $imageInfoBase.ByteSize $imageInfoHead.ByteSize)}}green{{end}}">{{FileSize $imageInfoHead.ByteSize}}</span>
+ 	</td>
+ </tr>
+{{end}}