From 096ee0c2670f176cfab76d54a440e5d9201d79b4 Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Wed, 4 Nov 2020 18:44:51 +0100
Subject: Add ctrl+arrow key to move by word in text input, fix search
 triggering with backspace repeat char

---
 src/Text.cpp | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 62 insertions(+), 2 deletions(-)

(limited to 'src/Text.cpp')

diff --git a/src/Text.cpp b/src/Text.cpp
index 6512c48..9c6bc86 100644
--- a/src/Text.cpp
+++ b/src/Text.cpp
@@ -291,6 +291,17 @@ namespace QuickMedia
                 return vertices_linear.back().line;
         }
     }
+
+    sf::Uint32 Text::get_vertex_codepoint(int index) const {
+        const int num_vertices = vertices_linear.size();
+        if(num_vertices == 0) {
+            return 0;
+        } else if(index < num_vertices) {
+            return vertices_linear[index].codepoint;
+        } else {
+            return vertices_linear.back().codepoint;
+        }
+    }
     
     void Text::updateGeometry(bool update_even_if_not_dirty) {
         if(dirtyText) {
@@ -546,6 +557,16 @@ namespace QuickMedia
                 caret_offset_x = get_caret_offset_by_caret_index(caretIndex);
                 break;
             }
+            case CaretMoveDirection::LEFT_WORD: {
+                caretIndex = getStartOfWord(caretIndex);
+                caret_offset_x = get_caret_offset_by_caret_index(caretIndex);
+                break;
+            }
+            case CaretMoveDirection::RIGHT_WORD: {
+                caretIndex = getEndOfWord(caretIndex);
+                caret_offset_x = get_caret_offset_by_caret_index(caretIndex);
+                break;
+            }
         }
 
         if(caretIndex == (int)vertices_linear.size()) {
@@ -587,6 +608,39 @@ namespace QuickMedia
         }
         return num_vertices;
     }
+
+    static bool is_special_character(sf::Uint32 codepoint) {
+        return (codepoint <= 47) || (codepoint >= 58 && codepoint <= 64) || (codepoint >= 91 && codepoint <= 96) || (codepoint >= 123 && codepoint <= 127);
+    }
+
+    int Text::getStartOfWord(int startIndex) const {
+        assert(!dirty && !dirtyText);
+        int start_line = get_vertex_line(startIndex);
+        bool start_is_special_char = is_special_character(get_vertex_codepoint(startIndex - 1));
+        for(int i = startIndex - 1; i >= 0; --i) {
+            if(get_vertex_line(i) != start_line)
+                return i + 1;
+            bool is_special_char = is_special_character(vertices_linear[i].codepoint);
+            if(is_special_char != start_is_special_char)
+                return i + 1;
+        }
+        return 0;
+    }
+
+    int Text::getEndOfWord(int startIndex) const {
+        assert(!dirty && !dirtyText);
+        const int num_vertices = vertices_linear.size();
+        int start_line = get_vertex_line(startIndex);
+        bool start_is_special_char = is_special_character(get_vertex_codepoint(startIndex));
+        for(int i = startIndex + 1; i < num_vertices; ++i) {
+            if(get_vertex_line(i) != start_line)
+                return i - 1;
+            bool is_special_char = is_special_character(vertices_linear[i].codepoint);
+            if(is_special_char != start_is_special_char)
+                return i;
+        }
+        return num_vertices;
+    }
     
     // TODO: This can be optimized by using binary search
     int Text::getPreviousLineClosestPosition(int startIndex) const
@@ -642,12 +696,18 @@ namespace QuickMedia
         {
             if(event.key.code == sf::Keyboard::Left && caretIndex > 0)
             {
-                caretMoveDirection = CaretMoveDirection::LEFT;
+                if(event.key.control)
+                    caretMoveDirection = CaretMoveDirection::LEFT_WORD;
+                else
+                    caretMoveDirection = CaretMoveDirection::LEFT;
                 dirtyCaret = true;
             }
             else if(event.key.code == sf::Keyboard::Right && !caretAtEnd)
             {
-                caretMoveDirection = CaretMoveDirection::RIGHT;
+                if(event.key.control)
+                    caretMoveDirection = CaretMoveDirection::RIGHT_WORD;
+                else
+                    caretMoveDirection = CaretMoveDirection::RIGHT;
                 dirtyCaret = true;
             }
             else if(event.key.code == sf::Keyboard::BackSpace && caretIndex > 0)
-- 
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