Add linewrap option 'auto' (#1507)

* Add linewrap option 'auto'

* Specify the exception thrown

* Add BDD test

* Specify name instead of number

* Create test for linewrap auto and fancy format

* Fix linewrap auto for fancy format

docs/reference-config-file.md

@@ -101,7 +101,8 @@ If `true`, tags will be highlighted in cyan.
 
 ### linewrap
 Controls the width of the output. Set to `false` if you don't want to
-wrap long lines.
+wrap long lines. Set to `auto` to let `jrnl` automatically determine
+the terminal width.
 
 ### colors
 A dictionary that controls the colors used to display journal entries.

jrnl/Entry.py

@@ -2,12 +2,14 @@
 # License: https://www.gnu.org/licenses/gpl-3.0.html
 
 import datetime
+import logging
+import os
 import re
 
 import ansiwrap
 
-from jrnl.color import colorize
-from jrnl.color import highlight_tags_with_background_color
+from .color import colorize
+from .color import highlight_tags_with_background_color
 
 
 class Entry:
@@ -104,6 +106,18 @@ class Entry:
         )
 
         if not short and self.journal.config["linewrap"]:
+            columns = self.journal.config["linewrap"]
+
+            if columns == "auto":
+                try:
+                    columns = os.get_terminal_size().columns
+                except OSError:
+                    logging.debug(
+                        "Can't determine terminal size automatically 'linewrap': '%s'",
+                        self.journal.config["linewrap"],
+                    )
+                    columns = 79
+
             # Color date / title and bold title
             title = ansiwrap.fill(
                 date_str
@@ -114,7 +128,7 @@ class Entry:
                     self.journal.config["colors"]["title"],
                     is_title=True,
                 ),
-                self.journal.config["linewrap"],
+                columns,
             )
             body = highlight_tags_with_background_color(
                 self, self.body.rstrip(" \n"), self.journal.config["colors"]["body"]
@@ -123,7 +137,7 @@ class Entry:
                 colorize(
                     ansiwrap.fill(
                         line,
-                        self.journal.config["linewrap"],
+                        columns,
                         initial_indent=indent,
                         subsequent_indent=indent,
                         drop_whitespace=True,

jrnl/plugins/fancy_exporter.py

@@ -1,6 +1,8 @@
 # Copyright (C) 2012-2022 jrnl contributors
 # License: https://www.gnu.org/licenses/gpl-3.0.html
 
+import logging
+import os
 from textwrap import TextWrapper
 
 from jrnl.exception import JrnlException
@@ -36,7 +38,22 @@ class FancyExporter(TextExporter):
     def export_entry(cls, entry):
         """Returns a fancy unicode representation of a single entry."""
         date_str = entry.date.strftime(entry.journal.config["timeformat"])
-        linewrap = entry.journal.config["linewrap"] or 78
+
+        if entry.journal.config["linewrap"]:
+            linewrap = entry.journal.config["linewrap"]
+
+            if linewrap == "auto":
+                try:
+                    linewrap = os.get_terminal_size().columns
+                except OSError:
+                    logging.debug(
+                        "Can't determine terminal size automatically 'linewrap': '%s'",
+                        entry.journal.config["linewrap"],
+                    )
+                    linewrap = 79
+        else:
+            linewrap = 79
+
         initial_linewrap = max((1, linewrap - len(date_str) - 2))
         body_linewrap = linewrap - 2
         card = [

tests/bdd/features/config_file.feature

@@ -107,6 +107,16 @@ Feature: Multiple journals
         When we run "jrnl --cf empty_file.yaml"
         Then the error output should contain "Unable to parse config file"
 
+    Scenario: Use a config file with linewrap set to 'auto'
+        Given we use the config "linewrap_auto.yaml"
+        When we run "jrnl -1"
+        Then the output should contain "Life is good."
+
+    Scenario: Use a config file with linewrap set to 'auto' and use format 'fancy'
+        Given we use the config "linewrap_auto.yaml"
+        When we run "jrnl -1 --format fancy"
+        Then the output should contain "Life is good."
+
     Scenario: Show a warning message when the config file contains duplicate keys at the same level
         Given the config "duplicate_keys.yaml" exists
         And we use the config "duplicate_keys.yaml"
@@ -122,4 +132,4 @@ Feature: Multiple journals
     Scenario: Don't show a duplicate keys warning message when using --config-override on an existing value
         Given we use the config "multiple.yaml"
         When we run "jrnl --config-override highlight false"
-        Then the output should not contain "There is at least one duplicate key in your configuration file"
+        Then the output should not contain "There is at least one duplicate key in your configuration file"

tests/data/configs/linewrap_auto.yaml

@@ -0,0 +1,17 @@
+default_hour: 9
+default_minute: 0
+editor: ""
+encrypt: false
+highlight: true
+journals:
+  default: features/journals/simple.journal
+linewrap: auto
+tagsymbols: "@"
+template: false
+timeformat: "%Y-%m-%d %H:%M"
+indent_character: "|"
+colors:
+  date: none
+  title: none
+  body: none
+  tags: none