]> asedeno.scripts.mit.edu Git - git.git/blobdiff - lib/diff.tcl
git-gui: avoid mis-encoding the copyright message on Windows.
[git.git] / lib / diff.tcl
index 29436b50cb351f88b1ebde20620729f210c37933..c628750276303fca620c9292463c4c59690c764f 100644 (file)
@@ -16,47 +16,70 @@ proc clear_diff {} {
        $ui_workdir tag remove in_diff 0.0 end
 }
 
-proc reshow_diff {} {
-       global ui_status_value file_states file_lists
+proc reshow_diff {{after {}}} {
+       global file_states file_lists
        global current_diff_path current_diff_side
+       global ui_diff
 
        set p $current_diff_path
        if {$p eq {}} {
                # No diff is being shown.
-       } elseif {$current_diff_side eq {}
-               || [catch {set s $file_states($p)}]
-               || [lsearch -sorted -exact $file_lists($current_diff_side) $p] == -1} {
+       } elseif {$current_diff_side eq {}} {
                clear_diff
+       } elseif {[catch {set s $file_states($p)}]
+               || [lsearch -sorted -exact $file_lists($current_diff_side) $p] == -1} {
+
+               if {[find_next_diff $current_diff_side $p {} {[^O]}]} {
+                       next_diff $after
+               } else {
+                       clear_diff
+               }
        } else {
-               show_diff $p $current_diff_side
+               set save_pos [lindex [$ui_diff yview] 0]
+               show_diff $p $current_diff_side {} $save_pos $after
+       }
+}
+
+proc force_diff_encoding {enc} {
+       global current_diff_path
+       
+       if {$current_diff_path ne {}} {
+               force_path_encoding $current_diff_path $enc
+               reshow_diff
        }
 }
 
 proc handle_empty_diff {} {
        global current_diff_path file_states file_lists
+       global diff_empty_count
 
        set path $current_diff_path
        set s $file_states($path)
-       if {[lindex $s 0] ne {_M}} return
+       if {[lindex $s 0] ne {_M} || [has_textconv $path]} return
 
-       info_popup "No differences detected.
+       # Prevent infinite rescan loops
+       incr diff_empty_count
+       if {$diff_empty_count > 1} return
 
-[short_path $path] has no changes.
+       info_popup [mc "No differences detected.
+
+%s has no changes.
 
 The modification date of this file was updated by another application, but the content within the file was not changed.
 
-A rescan will be automatically started to find other files which may have the same state."
+A rescan will be automatically started to find other files which may have the same state." [short_path $path]]
 
        clear_diff
        display_file $path __
-       rescan {set ui_status_value {Ready.}} 0
+       rescan ui_ready 0
 }
 
-proc show_diff {path w {lno {}}} {
+proc show_diff {path w {lno {}} {scroll_pos {}} {callback {}}} {
        global file_states file_lists
-       global is_3way_diff diff_active repo_config
-       global ui_diff ui_status_value ui_index ui_workdir
+       global is_3way_diff is_conflict_diff diff_active repo_config
+       global ui_diff ui_index ui_workdir
        global current_diff_path current_diff_side current_diff_header
+       global current_diff_queue
 
        if {$diff_active || ![lock_index read]} return
 
@@ -69,35 +92,124 @@ proc show_diff {path w {lno {}}} {
        }
        if {$lno >= 1} {
                $w tag add in_diff $lno.0 [expr {$lno + 1}].0
+               $w see $lno.0
        }
 
        set s $file_states($path)
        set m [lindex $s 0]
-       set is_3way_diff 0
-       set diff_active 1
+       set is_conflict_diff 0
        set current_diff_path $path
        set current_diff_side $w
-       set current_diff_header {}
-       set ui_status_value "Loading diff of [escape_path $path]..."
+       set current_diff_queue {}
+       ui_status [mc "Loading diff of %s..." [escape_path $path]]
+
+       set cont_info [list $scroll_pos $callback]
+
+       if {[string first {U} $m] >= 0} {
+               merge_load_stages $path [list show_unmerged_diff $cont_info]
+       } elseif {$m eq {_O}} {
+               show_other_diff $path $w $m $cont_info
+       } else {
+               start_show_diff $cont_info
+       }
+}
+
+proc show_unmerged_diff {cont_info} {
+       global current_diff_path current_diff_side
+       global merge_stages ui_diff is_conflict_diff
+       global current_diff_queue
+
+       if {$merge_stages(2) eq {}} {
+               set is_conflict_diff 1
+               lappend current_diff_queue \
+                       [list [mc "LOCAL: deleted\nREMOTE:\n"] d======= \
+                           [list ":1:$current_diff_path" ":3:$current_diff_path"]]
+       } elseif {$merge_stages(3) eq {}} {
+               set is_conflict_diff 1
+               lappend current_diff_queue \
+                       [list [mc "REMOTE: deleted\nLOCAL:\n"] d======= \
+                           [list ":1:$current_diff_path" ":2:$current_diff_path"]]
+       } elseif {[lindex $merge_stages(1) 0] eq {120000}
+               || [lindex $merge_stages(2) 0] eq {120000}
+               || [lindex $merge_stages(3) 0] eq {120000}} {
+               set is_conflict_diff 1
+               lappend current_diff_queue \
+                       [list [mc "LOCAL:\n"] d======= \
+                           [list ":1:$current_diff_path" ":2:$current_diff_path"]]
+               lappend current_diff_queue \
+                       [list [mc "REMOTE:\n"] d======= \
+                           [list ":1:$current_diff_path" ":3:$current_diff_path"]]
+       } else {
+               start_show_diff $cont_info
+               return
+       }
+
+       advance_diff_queue $cont_info
+}
+
+proc advance_diff_queue {cont_info} {
+       global current_diff_queue ui_diff
+
+       set item [lindex $current_diff_queue 0]
+       set current_diff_queue [lrange $current_diff_queue 1 end]
+
+       $ui_diff conf -state normal
+       $ui_diff insert end [lindex $item 0] [lindex $item 1]
+       $ui_diff conf -state disabled
+
+       start_show_diff $cont_info [lindex $item 2]
+}
+
+proc show_other_diff {path w m cont_info} {
+       global file_states file_lists
+       global is_3way_diff diff_active repo_config
+       global ui_diff ui_index ui_workdir
+       global current_diff_path current_diff_side current_diff_header
 
        # - Git won't give us the diff, there's nothing to compare to!
        #
        if {$m eq {_O}} {
-               set max_sz [expr {128 * 1024}]
+               set max_sz 100000
+               set type unknown
                if {[catch {
-                               set fd [open $path r]
-                               set content [read $fd $max_sz]
-                               close $fd
-                               set sz [file size $path]
+                               set type [file type $path]
+                               switch -- $type {
+                               directory {
+                                       set type submodule
+                                       set content {}
+                                       set sz 0
+                               }
+                               link {
+                                       set content [file readlink $path]
+                                       set sz [string length $content]
+                               }
+                               file {
+                                       set fd [open $path r]
+                                       fconfigure $fd \
+                                               -eofchar {} \
+                                               -encoding [get_path_encoding $path]
+                                       set content [read $fd $max_sz]
+                                       close $fd
+                                       set sz [file size $path]
+                               }
+                               default {
+                                       error "'$type' not supported"
+                               }
+                               }
                        } err ]} {
                        set diff_active 0
                        unlock_index
-                       set ui_status_value "Unable to display [escape_path $path]"
-                       error_popup "Error loading file:\n\n$err"
+                       ui_status [mc "Unable to display %s" [escape_path $path]]
+                       error_popup [strcat [mc "Error loading file:"] "\n\n$err"]
                        return
                }
                $ui_diff conf -state normal
-               if {![catch {set type [exec file $path]}]} {
+               if {$type eq {submodule}} {
+                       $ui_diff insert end [append \
+                               "* " \
+                               [mc "Git Repository (subproject)"] \
+                               "\n"] d_@
+               } elseif {![catch {set type [exec file $path]}]} {
                        set n [string length $path]
                        if {[string equal -length $n $path $type]} {
                                set type [string range $type $n end]
@@ -107,88 +219,144 @@ proc show_diff {path w {lno {}}} {
                }
                if {[string first "\0" $content] != -1} {
                        $ui_diff insert end \
-                               "* Binary file (not showing content)." \
+                               [mc "* Binary file (not showing content)."] \
                                d_@
                } else {
                        if {$sz > $max_sz} {
-                               $ui_diff insert end \
-"* Untracked file is $sz bytes.
-* Showing only first $max_sz bytes.
-" d_@
+                               $ui_diff insert end [mc \
+"* Untracked file is %d bytes.
+* Showing only first %d bytes.
+" $sz $max_sz] d_@
                        }
                        $ui_diff insert end $content
                        if {$sz > $max_sz} {
-                               $ui_diff insert end "
-* Untracked file clipped here by [appname].
+                               $ui_diff insert end [mc "
+* Untracked file clipped here by %s.
 * To see the entire file, use an external editor.
-" d_@
+" [appname]] d_@
                        }
                }
                $ui_diff conf -state disabled
                set diff_active 0
                unlock_index
-               set ui_status_value {Ready.}
+               set scroll_pos [lindex $cont_info 0]
+               if {$scroll_pos ne {}} {
+                       update
+                       $ui_diff yview moveto $scroll_pos
+               }
+               ui_ready
+               set callback [lindex $cont_info 1]
+               if {$callback ne {}} {
+                       eval $callback
+               }
                return
        }
+}
+
+proc start_show_diff {cont_info {add_opts {}}} {
+       global file_states file_lists
+       global is_3way_diff is_submodule_diff diff_active repo_config
+       global ui_diff ui_index ui_workdir
+       global current_diff_path current_diff_side current_diff_header
+
+       set path $current_diff_path
+       set w $current_diff_side
+
+       set s $file_states($path)
+       set m [lindex $s 0]
+       set is_3way_diff 0
+       set is_submodule_diff 0
+       set diff_active 1
+       set current_diff_header {}
 
-       set cmd [list | git]
+       set cmd [list]
        if {$w eq $ui_index} {
                lappend cmd diff-index
                lappend cmd --cached
        } elseif {$w eq $ui_workdir} {
-               if {[string index $m 0] eq {U}} {
+               if {[string first {U} $m] >= 0} {
                        lappend cmd diff
                } else {
                        lappend cmd diff-files
                }
        }
+       if {![is_config_false gui.textconv] && [git-version >= 1.6.1]} {
+               lappend cmd --textconv
+       }
+
+       if {[string match {160000 *} [lindex $s 2]]
+        || [string match {160000 *} [lindex $s 3]]} {
+               set is_submodule_diff 1
+
+               if {[git-version >= "1.6.6"]} {
+                       lappend cmd --submodule
+               }
+       }
 
        lappend cmd -p
        lappend cmd --no-color
-       if {$repo_config(gui.diffcontext) >= 0} {
+       if {$repo_config(gui.diffcontext) >= 1} {
                lappend cmd "-U$repo_config(gui.diffcontext)"
        }
        if {$w eq $ui_index} {
                lappend cmd [PARENT]
        }
-       lappend cmd --
-       lappend cmd $path
+       if {$add_opts ne {}} {
+               eval lappend cmd $add_opts
+       } else {
+               lappend cmd --
+               lappend cmd $path
+       }
+
+       if {$is_submodule_diff && [git-version < "1.6.6"]} {
+               if {$w eq $ui_index} {
+                       set cmd [list submodule summary --cached -- $path]
+               } else {
+                       set cmd [list submodule summary --files -- $path]
+               }
+       }
 
-       if {[catch {set fd [open $cmd r]} err]} {
+       if {[catch {set fd [eval git_read --nice $cmd]} err]} {
                set diff_active 0
                unlock_index
-               set ui_status_value "Unable to display [escape_path $path]"
-               error_popup "Error loading diff:\n\n$err"
+               ui_status [mc "Unable to display %s" [escape_path $path]]
+               error_popup [strcat [mc "Error loading diff:"] "\n\n$err"]
                return
        }
 
+       set ::current_diff_inheader 1
        fconfigure $fd \
                -blocking 0 \
-               -encoding binary \
-               -translation binary
-       fileevent $fd readable [list read_diff $fd]
+               -encoding [get_path_encoding $path] \
+               -translation lf
+       fileevent $fd readable [list read_diff $fd $cont_info]
 }
 
-proc read_diff {fd} {
-       global ui_diff ui_status_value diff_active
-       global is_3way_diff current_diff_header
+proc read_diff {fd cont_info} {
+       global ui_diff diff_active is_submodule_diff
+       global is_3way_diff is_conflict_diff current_diff_header
+       global current_diff_queue
+       global diff_empty_count
 
        $ui_diff conf -state normal
        while {[gets $fd line] >= 0} {
                # -- Cleanup uninteresting diff header lines.
                #
-               if {   [string match {diff --git *}      $line]
-                       || [string match {diff --cc *}       $line]
-                       || [string match {diff --combined *} $line]
-                       || [string match {--- *}             $line]
-                       || [string match {+++ *}             $line]} {
-                       append current_diff_header $line "\n"
-                       continue
+               if {$::current_diff_inheader} {
+                       if {   [string match {diff --git *}      $line]
+                           || [string match {diff --cc *}       $line]
+                           || [string match {diff --combined *} $line]
+                           || [string match {--- *}             $line]
+                           || [string match {+++ *}             $line]} {
+                               append current_diff_header $line "\n"
+                               continue
+                       }
                }
                if {[string match {index *} $line]} continue
                if {$line eq {deleted file mode 120000}} {
                        set line "deleted symlink"
                }
+               set ::current_diff_inheader 0
 
                # -- Automatically detect if this is a 3 way diff.
                #
@@ -196,7 +364,9 @@ proc read_diff {fd} {
 
                if {[string match {mode *} $line]
                        || [string match {new file *} $line]
+                       || [regexp {^(old|new) mode *} $line]
                        || [string match {deleted file *} $line]
+                       || [string match {deleted symlink} $line]
                        || [string match {Binary files * and * differ} $line]
                        || $line eq {\ No newline at end of file}
                        || [regexp {^\* Unmerged path } $line]} {
@@ -213,6 +383,7 @@ proc read_diff {fd} {
                        {--} {set tags d_--}
                        {++} {
                                if {[regexp {^\+\+([<>]{7} |={7})} $line _g op]} {
+                                       set is_conflict_diff 1
                                        set line [string replace $line 0 1 {  }]
                                        set tags d$op
                                } else {
@@ -224,6 +395,25 @@ proc read_diff {fd} {
                                set tags {}
                        }
                        }
+               } elseif {$is_submodule_diff} {
+                       if {$line == ""} continue
+                       if {[regexp {^Submodule } $line]} {
+                               set tags d_@
+                       } elseif {[regexp {^\* } $line]} {
+                               set line [string replace $line 0 1 {Submodule }]
+                               set tags d_@
+                       } else {
+                               set op [string range $line 0 2]
+                               switch -- $op {
+                               {  <} {set tags d_-}
+                               {  >} {set tags d_+}
+                               {  W} {set tags {}}
+                               default {
+                                       puts "error: Unhandled submodule diff marker: {$op}"
+                                       set tags {}
+                               }
+                               }
+                       }
                } else {
                        set op [string index $line 0]
                        switch -- $op {
@@ -232,7 +422,7 @@ proc read_diff {fd} {
                        {-} {set tags d_-}
                        {+} {
                                if {[regexp {^\+([<>]{7} |={7})} $line _g op]} {
-                                       set line [string replace $line 0 0 { }]
+                                       set is_conflict_diff 1
                                        set tags d$op
                                } else {
                                        set tags d_+
@@ -254,12 +444,30 @@ proc read_diff {fd} {
 
        if {[eof $fd]} {
                close $fd
+
+               if {$current_diff_queue ne {}} {
+                       advance_diff_queue $cont_info
+                       return
+               }
+
                set diff_active 0
                unlock_index
-               set ui_status_value {Ready.}
+               set scroll_pos [lindex $cont_info 0]
+               if {$scroll_pos ne {}} {
+                       update
+                       $ui_diff yview moveto $scroll_pos
+               }
+               ui_ready
 
                if {[$ui_diff index end] eq {2.0}} {
                        handle_empty_diff
+               } else {
+                       set diff_empty_count 0
+               }
+
+               set callback [lindex $cont_info 1]
+               if {$callback ne {}} {
+                       eval $callback
                }
        }
 }
@@ -271,17 +479,17 @@ proc apply_hunk {x y} {
        if {$current_diff_path eq {} || $current_diff_header eq {}} return
        if {![lock_index apply_hunk]} return
 
-       set apply_cmd {git apply --cached --whitespace=nowarn}
+       set apply_cmd {apply --cached --whitespace=nowarn}
        set mi [lindex $file_states($current_diff_path) 0]
        if {$current_diff_side eq $ui_index} {
-               set mode unstage
+               set failed_msg [mc "Failed to unstage selected hunk."]
                lappend apply_cmd --reverse
                if {[string index $mi 0] ne {M}} {
                        unlock_index
                        return
                }
        } else {
-               set mode stage
+               set failed_msg [mc "Failed to stage selected hunk."]
                if {[string index $mi 1] ne {M}} {
                        unlock_index
                        return
@@ -301,12 +509,13 @@ proc apply_hunk {x y} {
        }
 
        if {[catch {
-               set p [open "| $apply_cmd" w]
-               fconfigure $p -translation binary -encoding binary
+               set enc [get_path_encoding $current_diff_path]
+               set p [eval git_write $apply_cmd]
+               fconfigure $p -translation binary -encoding $enc
                puts -nonewline $p $current_diff_header
                puts -nonewline $p [$ui_diff get $s_lno $e_lno]
                close $p} err]} {
-               error_popup "Failed to $mode selected hunk.\n\n$err"
+               error_popup [append $failed_msg "\n\n$err"]
                unlock_index
                return
        }
@@ -330,7 +539,195 @@ proc apply_hunk {x y} {
        }
        unlock_index
        display_file $current_diff_path $mi
+       # This should trigger shift to the next changed file
        if {$o eq {_}} {
-               clear_diff
+               reshow_diff
        }
 }
+
+proc apply_range_or_line {x y} {
+       global current_diff_path current_diff_header current_diff_side
+       global ui_diff ui_index file_states
+
+       set selected [$ui_diff tag nextrange sel 0.0]
+
+       if {$selected == {}} {
+               set first [$ui_diff index "@$x,$y"]
+               set last $first
+       } else {
+               set first [lindex $selected 0]
+               set last [lindex $selected 1]
+       }
+
+       set first_l [$ui_diff index "$first linestart"]
+       set last_l [$ui_diff index "$last lineend"]
+
+       if {$current_diff_path eq {} || $current_diff_header eq {}} return
+       if {![lock_index apply_hunk]} return
+
+       set apply_cmd {apply --cached --whitespace=nowarn}
+       set mi [lindex $file_states($current_diff_path) 0]
+       if {$current_diff_side eq $ui_index} {
+               set failed_msg [mc "Failed to unstage selected line."]
+               set to_context {+}
+               lappend apply_cmd --reverse
+               if {[string index $mi 0] ne {M}} {
+                       unlock_index
+                       return
+               }
+       } else {
+               set failed_msg [mc "Failed to stage selected line."]
+               set to_context {-}
+               if {[string index $mi 1] ne {M}} {
+                       unlock_index
+                       return
+               }
+       }
+
+       set wholepatch {}
+
+       while {$first_l < $last_l} {
+               set i_l [$ui_diff search -backwards -regexp ^@@ $first_l 0.0]
+               if {$i_l eq {}} {
+                       # If there's not a @@ above, then the selected range
+                       # must have come before the first_l @@
+                       set i_l [$ui_diff search -regexp ^@@ $first_l $last_l]
+               }
+               if {$i_l eq {}} {
+                       unlock_index
+                       return
+               }
+               # $i_l is now at the beginning of a line
+
+               # pick start line number from hunk header
+               set hh [$ui_diff get $i_l "$i_l + 1 lines"]
+               set hh [lindex [split $hh ,] 0]
+               set hln [lindex [split $hh -] 1]
+
+               # There is a special situation to take care of. Consider this
+               # hunk:
+               #
+               #    @@ -10,4 +10,4 @@
+               #     context before
+               #    -old 1
+               #    -old 2
+               #    +new 1
+               #    +new 2
+               #     context after
+               #
+               # We used to keep the context lines in the order they appear in
+               # the hunk. But then it is not possible to correctly stage only
+               # "-old 1" and "+new 1" - it would result in this staged text:
+               #
+               #    context before
+               #    old 2
+               #    new 1
+               #    context after
+               #
+               # (By symmetry it is not possible to *un*stage "old 2" and "new
+               # 2".)
+               #
+               # We resolve the problem by introducing an asymmetry, namely,
+               # when a "+" line is *staged*, it is moved in front of the
+               # context lines that are generated from the "-" lines that are
+               # immediately before the "+" block. That is, we construct this
+               # patch:
+               #
+               #    @@ -10,4 +10,5 @@
+               #     context before
+               #    +new 1
+               #     old 1
+               #     old 2
+               #     context after
+               #
+               # But we do *not* treat "-" lines that are *un*staged in a
+               # special way.
+               #
+               # With this asymmetry it is possible to stage the change "old
+               # 1" -> "new 1" directly, and to stage the change "old 2" ->
+               # "new 2" by first staging the entire hunk and then unstaging
+               # the change "old 1" -> "new 1".
+               #
+               # Applying multiple lines adds complexity to the special
+               # situation.  The pre_context must be moved after the entire
+               # first block of consecutive staged "+" lines, so that
+               # staging both additions gives the following patch:
+               #
+               #    @@ -10,4 +10,6 @@
+               #     context before
+               #    +new 1
+               #    +new 2
+               #     old 1
+               #     old 2
+               #     context after
+
+               # This is non-empty if and only if we are _staging_ changes;
+               # then it accumulates the consecutive "-" lines (after
+               # converting them to context lines) in order to be moved after
+               # "+" change lines.
+               set pre_context {}
+
+               set n 0
+               set m 0
+               set i_l [$ui_diff index "$i_l + 1 lines"]
+               set patch {}
+               while {[$ui_diff compare $i_l < "end - 1 chars"] &&
+                      [$ui_diff get $i_l "$i_l + 2 chars"] ne {@@}} {
+                       set next_l [$ui_diff index "$i_l + 1 lines"]
+                       set c1 [$ui_diff get $i_l]
+                       if {[$ui_diff compare $first_l <= $i_l] &&
+                           [$ui_diff compare $i_l < $last_l] &&
+                           ($c1 eq {-} || $c1 eq {+})} {
+                               # a line to stage/unstage
+                               set ln [$ui_diff get $i_l $next_l]
+                               if {$c1 eq {-}} {
+                                       set n [expr $n+1]
+                                       set patch "$patch$pre_context$ln"
+                                       set pre_context {}
+                               } else {
+                                       set m [expr $m+1]
+                                       set patch "$patch$ln"
+                               }
+                       } elseif {$c1 ne {-} && $c1 ne {+}} {
+                               # context line
+                               set ln [$ui_diff get $i_l $next_l]
+                               set patch "$patch$pre_context$ln"
+                               set n [expr $n+1]
+                               set m [expr $m+1]
+                               set pre_context {}
+                       } elseif {$c1 eq $to_context} {
+                               # turn change line into context line
+                               set ln [$ui_diff get "$i_l + 1 chars" $next_l]
+                               if {$c1 eq {-}} {
+                                       set pre_context "$pre_context $ln"
+                               } else {
+                                       set patch "$patch $ln"
+                               }
+                               set n [expr $n+1]
+                               set m [expr $m+1]
+                       } else {
+                               # a change in the opposite direction of
+                               # to_context which is outside the range of
+                               # lines to apply.
+                               set patch "$patch$pre_context"
+                               set pre_context {}
+                       }
+                       set i_l $next_l
+               }
+               set patch "$patch$pre_context"
+               set wholepatch "$wholepatch@@ -$hln,$n +$hln,$m @@\n$patch"
+               set first_l [$ui_diff index "$next_l + 1 lines"]
+       }
+
+       if {[catch {
+               set enc [get_path_encoding $current_diff_path]
+               set p [eval git_write $apply_cmd]
+               fconfigure $p -translation binary -encoding $enc
+               puts -nonewline $p $current_diff_header
+               puts -nonewline $p $wholepatch
+               close $p} err]} {
+               error_popup [append $failed_msg "\n\n$err"]
+       }
+
+       unlock_index
+}