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greena13/react-hotkeys

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Similar blocks of code found in 2 locations. Consider refactoring.
Open

  _decrementComponentCount(){
    const preMountedComponentCount = this.mountedComponentsCount;
    this.mountedComponentsCount -= 1;

    if (preMountedComponentCount === 1 && this.mountedComponentsCount === 0) {
Severity: Major
Found in src/lib/KeyEventManager.js and 1 other location - About 1 hr to fix
src/lib/KeyEventManager.js on lines 94..101

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 69.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Similar blocks of code found in 2 locations. Consider refactoring.
Open

  _incrementComponentCount(){
    const preMountedComponentCount = this.mountedComponentsCount;
    this.mountedComponentsCount += 1;

    if (preMountedComponentCount === 0 && this.mountedComponentsCount === 1) {
Severity: Major
Found in src/lib/KeyEventManager.js and 1 other location - About 1 hr to fix
src/lib/KeyEventManager.js on lines 103..110

Duplicated Code

Duplicated code can lead to software that is hard to understand and difficult to change. The Don't Repeat Yourself (DRY) principle states:

Every piece of knowledge must have a single, unambiguous, authoritative representation within a system.

When you violate DRY, bugs and maintenance problems are sure to follow. Duplicated code has a tendency to both continue to replicate and also to diverge (leaving bugs as two similar implementations differ in subtle ways).

Tuning

This issue has a mass of 69.

We set useful threshold defaults for the languages we support but you may want to adjust these settings based on your project guidelines.

The threshold configuration represents the minimum mass a code block must have to be analyzed for duplication. The lower the threshold, the more fine-grained the comparison.

If the engine is too easily reporting duplication, try raising the threshold. If you suspect that the engine isn't catching enough duplication, try lowering the threshold. The best setting tends to differ from language to language.

See codeclimate-duplication's documentation for more information about tuning the mass threshold in your .codeclimate.yml.

Refactorings

Further Reading

Function handleKeyPress has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.
Open

  handleKeyPress(event, focusTreeId, componentId, options) {
    const key = getKeyName(event);

    if (this._isIgnoringRepeatedEvent(event, key, KeyEventType.keypress, componentId)) {
      return false;
Severity: Minor
Found in src/lib/strategies/FocusOnlyKeyEventStrategy.js - About 35 mins to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function _callHandlerIfActionNotHandled has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.
Open

  _callHandlerIfActionNotHandled(event, keyName, keyEventType, componentId, focusTreeId) {
    const eventName = describeKeyEventType(keyEventType);
    const combinationName = this._describeCurrentCombination();

    if (!this.componentList.anyActionsForEventType(keyEventType)) {
Severity: Minor
Found in src/lib/strategies/FocusOnlyKeyEventStrategy.js - About 35 mins to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function keyEventPrefix has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.
Open

  keyEventPrefix(componentId, options = {}) {
    const logIcons = super.constructor.logIcons;
    const eventIcons = super.constructor.eventIcons;
    const componentIcons = super.constructor.componentIcons;
Severity: Minor
Found in src/lib/logging/FocusOnlyLogger.js - About 35 mins to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function _matchesActionConfig has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.
Open

  _matchesActionConfig(keyCombination, keyName, eventType, actionOptions) {
    if (!canBeMatched(keyCombination, actionOptions) || !actionOptions.events[eventType]) {
      /**
       * If the combination does not have any actions bound to the key event we are
       * currently processing, we skip checking if it matches the current keys being
Severity: Minor
Found in src/lib/matching/KeyCombinationMatcher.js - About 35 mins to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function handleKeyUp has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.
Open

  handleKeyUp(event) {
    const key = getKeyName(event);

    if (this.currentCombination.isKeyUpSimulated(key)){
      this.logger.logEventAlreadySimulated(event, key, KeyEventType.keyup);
Severity: Minor
Found in src/lib/strategies/GlobalKeyEventStrategy.js - About 35 mins to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function reactAppHistoryWithEvent has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
Open

  reactAppHistoryWithEvent(key, type) {
    const previousPropagation =
      this.focusOnlyEventStrategy.eventPropagator.previousPropagation;

    if (previousPropagation.isForKey(key) && previousPropagation.isForEventType(type)) {
Severity: Minor
Found in src/lib/KeyEventManager.js - About 25 mins to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function _handleEventSimulation has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
Open

  _handleEventSimulation(listName, handlerName, {event, eventType, key, focusTreeId, componentId, options}) {
    if (this._shouldSimulate(eventType, key) && Configuration.option('simulateMissingKeyPressEvents')) {
      /**
       * If a key does not have a keypress event, we save the details of the keydown
       * event to simulate the keypress event, as the keydown event bubbles through
Severity: Minor
Found in src/lib/simulation/FocusOnlyKeyEventSimulator.js - About 25 mins to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function standardizeKeyName has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
Open

function standardizeKeyName(keyName, modifierKeys = { shift: false, alt: false}) {
  const _keyName = keyName.toLowerCase();

  const keyAfterAliases = MousetrapToReactKeyNamesDictionary[_keyName] || KeyShorthandDictionary[_keyName] || (keyName.match(/^f\d+$/) ? keyName.toUpperCase() : keyName);
Severity: Minor
Found in src/helpers/parsing-key-maps/standardizeKeyName.js - About 25 mins to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function handleKeyUp has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
Open

  handleKeyUp(event, focusTreeId, componentId, options) {
    const key = getKeyName(event);

    if (this.currentCombination.isKeyUpSimulated(key)) {
      this._ignoreAlreadySimulatedEvent(event, key, KeyEventType.keyup, componentId);
Severity: Minor
Found in src/lib/strategies/FocusOnlyKeyEventStrategy.js - About 25 mins to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

Function handleKeyPress has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.
Open

  handleKeyPress(event) {
    const key = getKeyName(event);

    if (this._isIgnoringRepeatedEvent(event, key, KeyEventType.keypress)) {
      return;
Severity: Minor
Found in src/lib/strategies/GlobalKeyEventStrategy.js - About 25 mins to fix

Cognitive Complexity

Cognitive Complexity is a measure of how difficult a unit of code is to intuitively understand. Unlike Cyclomatic Complexity, which determines how difficult your code will be to test, Cognitive Complexity tells you how difficult your code will be to read and comprehend.

A method's cognitive complexity is based on a few simple rules:

  • Code is not considered more complex when it uses shorthand that the language provides for collapsing multiple statements into one
  • Code is considered more complex for each "break in the linear flow of the code"
  • Code is considered more complex when "flow breaking structures are nested"

Further reading

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