Clipboard manager, just what I needed

config/i3/clipmenu

@@ -0,0 +1,52 @@
+#!/bin/bash
+
+shopt -s nullglob
+
+# We use this to make sure the cache files are sorted bytewise
+LC_COLLATE=C
+
+# Some people copy/paste huge swathes of text that could slow down dmenu
+line_length_limit=500
+
+declare -A selections
+ordered_selections=()
+
+files=("$HOME/.clipmenu/"*)
+
+# We can't use `for ... in` here because we need to add files to
+# ordered_selections from last to first -- that is, newest to oldest. Incoming
+# clipboard entries have a ISO datetime prefixed to the front to aid in this.
+for (( i=${#files[@]}-1; i>=0; i-- )); do
+    file=${files[$i]}
+
+    # We look for the first line matching regex /./ here because we want the
+    # first line that can provide reasonable context to the user. That is, if
+    # you have 5 leading lines of whitespace, displaying " (6 lines)" is much
+    # less useful than displaying "foo (6 lines)", where "foo" is the first
+    # line in the entry with actionable context.
+    first_line=$(sed -n '/./{p;q}' "$file" | cut -c1-"$line_length_limit")
+    lines=$(wc -l < "$file")
+
+    if (( lines > 1 )); then
+        first_line+=" ($lines lines)"
+    fi
+
+    ordered_selections+=("$first_line")
+    selections[$first_line]=$file
+done
+
+# It's okay to hardcode `-l 8` here as a sensible default without checking
+# whether `-l` is also in "$@", because the way that dmenu works allows a later
+# argument to override an earlier one. That is, if the user passes in `-l`, our
+# one will be ignored.
+chosen_line=$(printf '%s\n' "${ordered_selections[@]}" | uniq | $HOME/.config/i3/dmenu_cmd -l 8 -p "Copy" "$@")
+
+[[ $chosen_line ]] || exit 1
+
+for selection in clipboard primary; do
+    if type -p xsel >/dev/null 2>&1; then
+        xsel --logfile /dev/null -i --"$selection" < "${selections[$chosen_line]}"
+    else
+        xclip -sel "$selection" < "${selections[$chosen_line]}"
+    fi
+done

config/i3/clipmenud

@@ -0,0 +1,127 @@
+#!/bin/bash
+
+hr_msg() {
+    printf -- '\n--- %s ---\n\n' "$1" >&2
+}
+
+debug() {
+    if (( DEBUG )); then
+        printf '%s\n' "$@" >&2
+    fi
+}
+
+print_debug_info() {
+    # DEBUG comes from the environment
+    if ! (( DEBUG )); then
+        return
+    fi
+
+    local msg="${1?}"
+
+    hr_msg "$msg"
+
+    hr_msg Environment
+    env | LC_ALL=C sort >&2
+
+    cgroup_path=/proc/$$/cgroup
+
+    if [[ -f $cgroup_path ]]; then
+        hr_msg cgroup
+        cat "$cgroup_path" >&2
+    else
+        hr_msg 'NO CGROUP'
+    fi
+
+    hr_msg 'Finished debug info'
+}
+
+print_debug_info 'Initialising'
+
+cache_dir=$HOME/.clipmenu/
+
+# It's ok that this only applies to the final directory.
+# shellcheck disable=SC2174
+mkdir -p -m0700 "$cache_dir"
+
+declare -A last_data
+declare -A last_filename
+
+while sleep "${CLIPMENUD_SLEEP:-0.5}"; do
+    print_debug_info 'About to run selection'
+
+    for selection in clipboard primary; do
+        print_debug_info "About to do selection for '$selection'"
+
+        if type -p xsel >/dev/null 2>&1; then
+            debug 'Using xsel'
+            data=$(xsel --logfile /dev/null -o --"$selection"; printf x)
+        else
+            debug 'Using xclip'
+            data=$(xclip -o -sel "$selection"; printf x)
+        fi
+
+        debug "Data before stripping: $data"
+
+        # We add and remove the x so that trailing newlines are not stripped.
+        # Otherwise, they would be stripped by the very nature of how POSIX
+        # defines command substitution.
+        data=${data%x}
+
+        debug "Data after stripping: $data"
+
+        if [[ $data != *[^[:space:]]* ]]; then
+            debug "Skipping as clipboard is only blank"
+            continue
+        fi
+
+        if [[ ${last_data[$selection]} == "$data" ]]; then
+            debug 'Skipping as last selection is the same as this one'
+            continue
+        fi
+
+        # If we were in the middle of doing a selection when the previous poll
+        # ran, then we may have got a partial clip.
+        possible_partial=${last_data[$selection]}
+        if [[ $possible_partial && $data == "$possible_partial"* ]]; then
+            debug "$possible_partial is a possible partial of $data"
+            debug "Removing ${last_filename[$selection]}"
+            rm -- "${last_filename[$selection]}"
+        fi
+
+        filename="$cache_dir/$(LC_ALL=C date +%F-%T.%N)"
+
+        last_data[$selection]=$data
+        last_filename[$selection]=$filename
+
+        debug "Writing $data to $filename"
+        printf '%s' "$data" > "$filename"
+
+        if ! (( NO_OWN_CLIPBOARD )) && [[ $selection != primary ]]; then
+            # Take ownership of the clipboard, in case the original application
+            # is unable to serve the clipboard request (due to being suspended,
+            # etc).
+            #
+            # Primary is excluded from the change of ownership as applications
+            # sometimes act up if clipboard focus is taken away from them --
+            # for example, urxvt will unhilight text, which is undesirable.
+            #
+            # We can't colocate this with the above copying code because
+            # https://github.com/cdown/clipmenu/issues/34 requires knowing if
+            # we would skip first.
+            if type -p xsel >/dev/null 2>&1; then
+                xsel --logfile /dev/null -o --"$selection" | xsel -i --"$selection"
+            else
+                xclip -o -sel "$selection" | xclip -i -sel "$selection"
+            fi
+        fi
+
+        if ! (( NO_TRANSFER_CLIPBOARD )) && [[ $selection != primary ]]; then
+            # Copy every clipboard content into primary clipboard
+            if type -p xsel >/dev/null 2>&1; then
+                xsel --logfile /dev/null -o --"$selection" | xsel -i --primary
+            else
+                xclip -o -sel "$selection" | xclip -i -sel primary
+            fi
+        fi
+    done
+done

config/i3/config

@@ -38,6 +38,7 @@ bindsym $mod+F2 exec --no-startup-id ~/.config/i3/dmenu_run
 bindsym Mod1+F2 exec --no-startup-id ~/.config/i3/dmenu_run
 
 bindsym $mod+c exec --no-startup-id ~/.config/i3/passmenu
+bindsym $mod+x exec --no-startup-id ~/.config/i3/clipmenu
 bindsym $mod+asterisk exec --no-startup-id ~/.config/i3/sshmenu
 bindsym $mod+dollar exec --no-startup-id ~/.config/i3/sshmenu root
 
@@ -246,7 +247,7 @@ for_window [window_role="task_dialog"] floating enable
 for_window [urgent=latest] focus
 
 # focus urgent window
-bindsym $mod+x [urgent=latest] focus
+#bindsym $mod+x [urgent=latest] focus
 
 # reload the configuration file
 bindsym $mod+Shift+c reload
@@ -377,6 +378,7 @@ exec --no-startup-id numlockx on # Activate Num lock
 #exec --no-startup-id conky -c $HOME/.conky/status # Desktop widget
 exec --no-startup-id unclutter # Hide mouse cursor after some time
 exec --no-startup-id dunst # Notifications
+exec --no-startup-id $HOME/.config/i3/clipmenud # Clipboard manager
 
 # Autostart programs
 #exec --no-startup-id i3-msg 'workspace $WS8; exec firefox --new-window tweetdeck.twitter.com'

config/i3/dmenu_cmd

@@ -1,2 +1,2 @@
 #!/bin/sh
-dmenu -fn 'DejaVu Sans Mono-8' -nb '#222222' -nf '#888888' -sb '#4E9C00' -sf '#FFFFFF' "$@"
+dmenu -fn 'DejaVu Sans Mono-10' -nb '#222222' -nf '#888888' -sb '#4E9C00' -sf '#FFFFFF' -l 8 -f -i -h 19 "$@"