如何实现CodeMirror无需Ctrl+Space自动显示提示功能

Hey there! Let's tackle why your auto-completion setup isn't working as intended. The issue with your second attempt is that you're redefining the autocomplete command inside the inputRead event but never actually calling it to trigger the hint display. Let's fix that with a more straightforward approach:

核心问题分析 #

Your code was setting up the autocomplete command logic but not executing it when input happens. Additionally, without a small delay or check for existing completion panels, you might run into duplicate or overly frequent hint popups.

修改后的完整代码示例 #

Here's how to adjust your editor initialization to enable real-time auto-completion, including support for "." triggers (since you modified show-hints.js for that):

$http.get("/getApexBody", config).then(function(response) {
    document.getElementById("saveBtn").disabled = false;
    document.getElementById("cleanBtn").disabled = false;
    $scope.apexClassWrapper = response.data;
    $('#loaderImage').hide();

    if (globalEditor1) {
        globalEditor1.toTextArea();
    }

    setTimeout(function() {
        // Initialize CodeMirror editor
        var editor = CodeMirror.fromTextArea(document.getElementById('apexBody'), {
            lineNumbers: true,
            matchBrackets: true,
            gutters: ["CodeMirror-lint-markers"],
            lint: true,
            mode: "text/x-apex"
        });

        // Set up auto-completion trigger logic
        var completionDelay = 200; // Small delay to avoid spamming hints
        var completionTimeout;

        editor.on('inputRead', function(editorInstance, input) {
            // Clear any pending timeout to avoid multiple triggers
            if (completionTimeout) clearTimeout(completionTimeout);

            // Define which characters should trigger auto-completion
            // Adjust this regex to match your needs (includes letters, numbers, and ".")
            var triggerRegex = /[a-zA-Z0-9\.]/;
            if (!triggerRegex.test(input.text[0])) {
                return; // Skip if input isn't a trigger character
            }

            // Delay triggering to let the user finish typing a segment
            completionTimeout = setTimeout(function() {
                // Only trigger if no completion panel is already active
                if (!editorInstance.state.completionActive) {
                    editorInstance.showHint({
                        hint: CodeMirror.hint.auto,
                        completeSingle: false // Optional: Don't auto-complete if only one option exists
                    });
                }
            }, completionDelay);
        });

        globalEditor1 = editor; // Use the direct editor instance instead of jQuery lookup
    }, 2000);
});

关键改进点 #

• Direct hint invocation: Instead of redefining the autocomplete command, we directly call editor.showHint() when input matches our trigger conditions.
• Delay timer: The 200ms delay prevents the hint panel from popping up on every single keystroke, making the experience smoother.
• Active completion check: We check editor.state.completionActive to avoid duplicate hint panels from appearing.
• Reliable editor reference: Assigning the direct editor instance to globalEditor1 avoids potential issues with jQuery's DOM lookup.

额外注意事项 #

1. Ensure you've included the show-hint.css file alongside show-hints.js—without it, the hint panel will have broken styling.
2. Verify that your modified show-hints.js correctly handles "." as a trigger character (your custom changes should align with the trigger regex we used above).
3. If CodeMirror.hint.auto isn't pulling in Apex-specific completions, double-check that you've loaded the appropriate hint plugin for Apex syntax.

内容的提问来源于stack exchange，提问作者Nagendra Singh