File size: 7,314 Bytes
f56a29b | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 | import type { PPTElement } from '@/lib/types/slides';
export function useOrderElement() {
/**
* Get the z-order range of grouped elements
* @param elementList All elements on the page
* @param combineElementList Grouped elements list
*/
const getCombineElementLevelRange = (
elementList: PPTElement[],
combineElementList: PPTElement[],
) => {
return {
minLevel: elementList.findIndex((_element) => _element.id === combineElementList[0].id),
maxLevel: elementList.findIndex(
(_element) => _element.id === combineElementList[combineElementList.length - 1].id,
),
};
};
/**
* Move up one layer
* @param elementList All elements on the page
* @param element The element being operated on
*/
const moveUpElement = (elementList: PPTElement[], element: PPTElement) => {
const copyOfElementList: PPTElement[] = JSON.parse(JSON.stringify(elementList));
// If the element is a group member, all group members must be moved together
if (element.groupId) {
// Get all group members and their z-order range
const combineElementList = copyOfElementList.filter(
(_element) => _element.groupId === element.groupId,
);
const { minLevel, maxLevel } = getCombineElementLevelRange(elementList, combineElementList);
// Already at the top level, cannot move further
if (maxLevel >= elementList.length - 1) return;
const nextElement = copyOfElementList[maxLevel + 1];
const movedElementList = copyOfElementList.splice(minLevel, combineElementList.length);
if (nextElement.groupId) {
const nextCombineElementList = copyOfElementList.filter(
(_element) => _element.groupId === nextElement.groupId,
);
copyOfElementList.splice(minLevel + nextCombineElementList.length, 0, ...movedElementList);
} else copyOfElementList.splice(minLevel + 1, 0, ...movedElementList);
}
// If the element is not a group member
else {
// Get the element's z-level in the list
const level = elementList.findIndex((item) => item.id === element.id);
// Already at the top level, cannot move further
if (level === elementList.length - 1) return;
// Get the element above, remove this element from the list (cache removed element).
// If the above element is in a group, insert above that group.
// If the above element is not in any group, insert above that element.
const nextElement = copyOfElementList[level + 1];
const [movedElement] = copyOfElementList.splice(level, 1);
if (nextElement.groupId) {
const combineElementList = copyOfElementList.filter(
(_element) => _element.groupId === nextElement.groupId,
);
copyOfElementList.splice(level + combineElementList.length, 0, movedElement);
} else copyOfElementList.splice(level + 1, 0, movedElement);
}
return copyOfElementList;
};
/**
* Move down one layer, same approach as move up
* @param elementList All elements on the page
* @param element The element being operated on
*/
const moveDownElement = (elementList: PPTElement[], element: PPTElement) => {
const copyOfElementList: PPTElement[] = JSON.parse(JSON.stringify(elementList));
if (element.groupId) {
const combineElementList = copyOfElementList.filter(
(_element) => _element.groupId === element.groupId,
);
const { minLevel } = getCombineElementLevelRange(elementList, combineElementList);
if (minLevel === 0) return;
const prevElement = copyOfElementList[minLevel - 1];
const movedElementList = copyOfElementList.splice(minLevel, combineElementList.length);
if (prevElement.groupId) {
const prevCombineElementList = copyOfElementList.filter(
(_element) => _element.groupId === prevElement.groupId,
);
copyOfElementList.splice(minLevel - prevCombineElementList.length, 0, ...movedElementList);
} else copyOfElementList.splice(minLevel - 1, 0, ...movedElementList);
} else {
const level = elementList.findIndex((item) => item.id === element.id);
if (level === 0) return;
const prevElement = copyOfElementList[level - 1];
const movedElement = copyOfElementList.splice(level, 1)[0];
if (prevElement.groupId) {
const combineElementList = copyOfElementList.filter(
(_element) => _element.groupId === prevElement.groupId,
);
copyOfElementList.splice(level - combineElementList.length, 0, movedElement);
} else copyOfElementList.splice(level - 1, 0, movedElement);
}
return copyOfElementList;
};
/**
* Bring to front
* @param elementList All elements on the page
* @param element The element being operated on
*/
const moveTopElement = (elementList: PPTElement[], element: PPTElement) => {
const copyOfElementList: PPTElement[] = JSON.parse(JSON.stringify(elementList));
// If the element is a group member, all group members must be moved together
if (element.groupId) {
// Get all group members and their z-order range
const combineElementList = copyOfElementList.filter(
(_element) => _element.groupId === element.groupId,
);
const { minLevel, maxLevel } = getCombineElementLevelRange(elementList, combineElementList);
// Already at the top level, cannot move further
if (maxLevel === elementList.length - 1) return null;
// Remove the group from the list, then append removed elements to the top
const movedElementList = copyOfElementList.splice(minLevel, combineElementList.length);
copyOfElementList.push(...movedElementList);
}
// If the element is not a group member
else {
// Get the element's z-level in the list
const level = elementList.findIndex((item) => item.id === element.id);
// Already at the top level, cannot move further
if (level === elementList.length - 1) return null;
// Remove the element from the list, then append it to the top
copyOfElementList.splice(level, 1);
copyOfElementList.push(element);
}
return copyOfElementList;
};
/**
* Send to back, same approach as bring to front
* @param elementList All elements on the page
* @param element The element being operated on
*/
const moveBottomElement = (elementList: PPTElement[], element: PPTElement) => {
const copyOfElementList: PPTElement[] = JSON.parse(JSON.stringify(elementList));
if (element.groupId) {
const combineElementList = copyOfElementList.filter(
(_element) => _element.groupId === element.groupId,
);
const { minLevel } = getCombineElementLevelRange(elementList, combineElementList);
if (minLevel === 0) return;
const movedElementList = copyOfElementList.splice(minLevel, combineElementList.length);
copyOfElementList.unshift(...movedElementList);
} else {
const level = elementList.findIndex((item) => item.id === element.id);
if (level === 0) return;
copyOfElementList.splice(level, 1);
copyOfElementList.unshift(element);
}
return copyOfElementList;
};
return {
moveUpElement,
moveDownElement,
moveTopElement,
moveBottomElement,
};
}
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