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| 1 | +#pragma once |
| 2 | + |
| 3 | +// License: zlib |
| 4 | +// Copyright (c) 2019 Juliette Foucaut & Doug Binks |
| 5 | +// |
| 6 | +// This software is provided 'as-is', without any express or implied |
| 7 | +// warranty. In no event will the authors be held liable for any damages |
| 8 | +// arising from the use of this software. |
| 9 | +// |
| 10 | +// Permission is granted to anyone to use this software for any purpose, |
| 11 | +// including commercial applications, and to alter it and redistribute it |
| 12 | +// freely, subject to the following restrictions: |
| 13 | +// |
| 14 | +// 1. The origin of this software must not be misrepresented; you must not |
| 15 | +// claim that you wrote the original software. If you use this software |
| 16 | +// in a product, an acknowledgment in the product documentation would be |
| 17 | +// appreciated but is not required. |
| 18 | +// 2. Altered source versions must be plainly marked as such, and must not be |
| 19 | +// misrepresented as being the original software. |
| 20 | +// 3. This notice may not be removed or altered from any source distribution. |
| 21 | + |
| 22 | +/* |
| 23 | +API BREAKING CHANGES |
| 24 | +==================== |
| 25 | +- 2020/04/22 - Added tooltipCallback parameter to ImGui::MarkdownConfig |
| 26 | +- 2019/02/01 - Changed LinkCallback parameters, see https://github.com/juliettef/imgui_markdown/issues/2 |
| 27 | +- 2019/02/05 - Added imageCallback parameter to ImGui::MarkdownConfig |
| 28 | +- 2019/02/06 - Added useLinkCallback member variable to MarkdownImageData to configure using images as links |
| 29 | +*/ |
| 30 | + |
| 31 | +/* |
| 32 | +imgui_markdown https://github.com/juliettef/imgui_markdown |
| 33 | +Markdown for Dear ImGui |
| 34 | + |
| 35 | +A permissively licensed markdown single-header library for https://github.com/ocornut/imgui |
| 36 | + |
| 37 | +Currently requires C++11 or above |
| 38 | + |
| 39 | +imgui_markdown currently supports the following markdown functionality: |
| 40 | + - Wrapped text |
| 41 | + - Headers H1, H2, H3 |
| 42 | + - Emphasis |
| 43 | + - Indented text, multi levels |
| 44 | + - Unordered lists and sub-lists |
| 45 | + - Link |
| 46 | + - Image |
| 47 | + - Horizontal rule |
| 48 | + |
| 49 | +Syntax |
| 50 | + |
| 51 | +Wrapping: |
| 52 | +Text wraps automatically. To add a new line, use 'Return'. |
| 53 | + |
| 54 | +Headers: |
| 55 | +# H1 |
| 56 | +## H2 |
| 57 | +### H3 |
| 58 | + |
| 59 | +Emphasis: |
| 60 | +*emphasis* |
| 61 | +_emphasis_ |
| 62 | +**strong emphasis** |
| 63 | +__strong emphasis__ |
| 64 | + |
| 65 | +Indents: |
| 66 | +On a new line, at the start of the line, add two spaces per indent. |
| 67 | + Indent level 1 |
| 68 | + Indent level 2 |
| 69 | + |
| 70 | +Unordered lists: |
| 71 | +On a new line, at the start of the line, add two spaces, an asterisks and a space. |
| 72 | +For nested lists, add two additional spaces in front of the asterisk per list level increment. |
| 73 | + * Unordered List level 1 |
| 74 | + * Unordered List level 2 |
| 75 | + |
| 76 | +Link: |
| 77 | +[link description](https://...) |
| 78 | + |
| 79 | +Image: |
| 80 | + |
| 81 | + |
| 82 | +Horizontal Rule: |
| 83 | +*** |
| 84 | +___ |
| 85 | + |
| 86 | +=============================================================================== |
| 87 | + |
| 88 | +// Example use on Windows with links opening in a browser |
| 89 | + |
| 90 | +#include "ImGui.h" // https://github.com/ocornut/imgui |
| 91 | +#include "imgui_markdown.h" // https://github.com/juliettef/imgui_markdown |
| 92 | +#include "IconsFontAwesome5.h" // https://github.com/juliettef/IconFontCppHeaders |
| 93 | + |
| 94 | +// Following includes for Windows LinkCallback |
| 95 | +#define WIN32_LEAN_AND_MEAN |
| 96 | +#include <Windows.h> |
| 97 | +#include "Shellapi.h" |
| 98 | +#include <string> |
| 99 | + |
| 100 | +void LinkCallback( ImGui::MarkdownLinkCallbackData data_ ); |
| 101 | +inline ImGui::MarkdownImageData ImageCallback( ImGui::MarkdownLinkCallbackData data_ ); |
| 102 | + |
| 103 | +static ImFont* H1 = NULL; |
| 104 | +static ImFont* H2 = NULL; |
| 105 | +static ImFont* H3 = NULL; |
| 106 | + |
| 107 | +static ImGui::MarkdownConfig mdConfig; |
| 108 | + |
| 109 | + |
| 110 | +void LinkCallback( ImGui::MarkdownLinkCallbackData data_ ) |
| 111 | +{ |
| 112 | + std::string url( data_.link, data_.linkLength ); |
| 113 | + if( !data_.isImage ) |
| 114 | + { |
| 115 | + ShellExecuteA( NULL, "open", url.c_str(), NULL, NULL, SW_SHOWNORMAL ); |
| 116 | + } |
| 117 | +} |
| 118 | + |
| 119 | +inline ImGui::MarkdownImageData ImageCallback( ImGui::MarkdownLinkCallbackData data_ ) |
| 120 | +{ |
| 121 | + // In your application you would load an image based on data_ input. Here we just use the imgui font texture. |
| 122 | + ImTextureID image = ImGui::GetIO().Fonts->TexID; |
| 123 | + // > C++14 can use ImGui::MarkdownImageData imageData{ true, false, image, ImVec2( 40.0f, 20.0f ) }; |
| 124 | + ImGui::MarkdownImageData imageData; |
| 125 | + imageData.isValid = true; |
| 126 | + imageData.useLinkCallback = false; |
| 127 | + imageData.user_texture_id = image; |
| 128 | + imageData.size = ImVec2( 40.0f, 20.0f ); |
| 129 | + |
| 130 | + // For image resize when available size.x > image width, add |
| 131 | + ImVec2 const contentSize = ImGui::GetContentRegionAvail(); |
| 132 | + if( imageData.size.x > contentSize.x ) |
| 133 | + { |
| 134 | + float const ratio = imageData.size.y/imageData.size.x; |
| 135 | + imageData.size.x = contentSize.x; |
| 136 | + imageData.size.y = contentSize.x*ratio; |
| 137 | + } |
| 138 | + |
| 139 | + return imageData; |
| 140 | +} |
| 141 | + |
| 142 | +void LoadFonts( float fontSize_ = 12.0f ) |
| 143 | +{ |
| 144 | + ImGuiIO& io = ImGui::GetIO(); |
| 145 | + io.Fonts->Clear(); |
| 146 | + // Base font |
| 147 | + io.Fonts->AddFontFromFileTTF( "myfont.ttf", fontSize_ ); |
| 148 | + // Bold headings H2 and H3 |
| 149 | + H2 = io.Fonts->AddFontFromFileTTF( "myfont-bold.ttf", fontSize_ ); |
| 150 | + H3 = mdConfig.headingFormats[ 1 ].font; |
| 151 | + // bold heading H1 |
| 152 | + float fontSizeH1 = fontSize_ * 1.1f; |
| 153 | + H1 = io.Fonts->AddFontFromFileTTF( "myfont-bold.ttf", fontSizeH1 ); |
| 154 | +} |
| 155 | + |
| 156 | +void ExampleMarkdownFormatCallback( const ImGui::MarkdownFormatInfo& markdownFormatInfo_, bool start_ ) |
| 157 | +{ |
| 158 | + // Call the default first so any settings can be overwritten by our implementation. |
| 159 | + // Alternatively could be called or not called in a switch statement on a case by case basis. |
| 160 | + // See defaultMarkdownFormatCallback definition for furhter examples of how to use it. |
| 161 | + ImGui::defaultMarkdownFormatCallback( markdownFormatInfo_, start_ ); |
| 162 | + |
| 163 | + switch( markdownFormatInfo_.type ) |
| 164 | + { |
| 165 | + // example: change the colour of heading level 2 |
| 166 | + case ImGui::MarkdownFormatType::HEADING: |
| 167 | + { |
| 168 | + if( markdownFormatInfo_.level == 2 ) |
| 169 | + { |
| 170 | + if( start_ ) |
| 171 | + { |
| 172 | + ImGui::PushStyleColor( ImGuiCol_Text, ImGui::GetStyle().Colors[ ImGuiCol_TextDisabled ] ); |
| 173 | + } |
| 174 | + else |
| 175 | + { |
| 176 | + ImGui::PopStyleColor(); |
| 177 | + } |
| 178 | + } |
| 179 | + break; |
| 180 | + } |
| 181 | + default: |
| 182 | + { |
| 183 | + break; |
| 184 | + } |
| 185 | + } |
| 186 | +} |
| 187 | + |
| 188 | +void Markdown( const std::string& markdown_ ) |
| 189 | +{ |
| 190 | + // You can make your own Markdown function with your prefered string container and markdown config. |
| 191 | + // > C++14 can use ImGui::MarkdownConfig mdConfig{ LinkCallback, NULL, ImageCallback, ICON_FA_LINK, { { H1, true }, { H2, true }, { H3, false } }, NULL }; |
| 192 | + mdConfig.linkCallback = LinkCallback; |
| 193 | + mdConfig.tooltipCallback = NULL; |
| 194 | + mdConfig.imageCallback = ImageCallback; |
| 195 | + mdConfig.linkIcon = ICON_FA_LINK; |
| 196 | + mdConfig.headingFormats[0] = { H1, true }; |
| 197 | + mdConfig.headingFormats[1] = { H2, true }; |
| 198 | + mdConfig.headingFormats[2] = { H3, false }; |
| 199 | + mdConfig.userData = NULL; |
| 200 | + mdConfig.formatCallback = ExampleMarkdownFormatCallback; |
| 201 | + ImGui::Markdown( markdown_.c_str(), markdown_.length(), mdConfig ); |
| 202 | +} |
| 203 | + |
| 204 | +void MarkdownExample() |
| 205 | +{ |
| 206 | + const std::string markdownText = u8R"( |
| 207 | +# H1 Header: Text and Links |
| 208 | +You can add [links like this one to enkisoftware](https://www.enkisoftware.com/) and lines will wrap well. |
| 209 | +You can also insert images  |
| 210 | +Horizontal rules: |
| 211 | +*** |
| 212 | +___ |
| 213 | +*Emphasis* and **strong emphasis** change the appearance of the text. |
| 214 | +## H2 Header: indented text. |
| 215 | + This text has an indent (two leading spaces). |
| 216 | + This one has two. |
| 217 | +### H3 Header: Lists |
| 218 | + * Unordered lists |
| 219 | + * Lists can be indented with two extra spaces. |
| 220 | + * Lists can have [links like this one to Avoyd](https://www.avoyd.com/) and *emphasized text* |
| 221 | +)"; |
| 222 | + Markdown( markdownText ); |
| 223 | +} |
| 224 | + |
| 225 | +=============================================================================== |
| 226 | +*/ |
| 227 | + |
| 228 | +#include <stdint.h> |
| 229 | + |
| 230 | +typedef int ImGuiMarkdownFormatFlags; |
| 231 | + |
| 232 | +enum ImGuiMarkdownFormatFlags_ |
| 233 | +{ |
| 234 | + ImGuiMarkdownFormatFlags_None = 0, |
| 235 | + ImGuiMarkdownFormatFlags_DiscardExtraNewLines = 1 << 0, // (Accurate parsing) Provided markdown will discard all redundant newlines |
| 236 | + ImGuiMarkdownFormatFlags_NoNewLineBeforeHeading = 1 << 1, // (Accurate parsing) Provided markdown will not format a newline after the first line if it is a heading |
| 237 | + ImGuiMarkdownFormatFlags_SeparatorDoesNotAdvance = 1 << 2, // (Accurate parsing) Provided markdown will not advance to the next line after formatting a separator |
| 238 | + ImGuiMarkdownFormatFlags_GithubStyle = ImGuiMarkdownFormatFlags_DiscardExtraNewLines | ImGuiMarkdownFormatFlags_NoNewLineBeforeHeading | ImGuiMarkdownFormatFlags_SeparatorDoesNotAdvance, |
| 239 | + ImGuiMarkdownFormatFlags_CommonMarkAll = ImGuiMarkdownFormatFlags_DiscardExtraNewLines | ImGuiMarkdownFormatFlags_NoNewLineBeforeHeading | ImGuiMarkdownFormatFlags_SeparatorDoesNotAdvance, |
| 240 | +}; |
| 241 | + |
| 242 | +namespace ImGui |
| 243 | +{ |
| 244 | + //----------------------------------------------------------------------------- |
| 245 | + // Basic types |
| 246 | + //----------------------------------------------------------------------------- |
| 247 | + |
| 248 | + struct Link; |
| 249 | + struct MarkdownConfig; |
| 250 | + |
| 251 | + struct MarkdownLinkCallbackData // for both links and images |
| 252 | + { |
| 253 | + const char* text; // text between square brackets [] |
| 254 | + int textLength; |
| 255 | + const char* link; // text between brackets () |
| 256 | + int linkLength; |
| 257 | + void* userData; |
| 258 | + bool isImage; // true if '!' is detected in front of the link syntax |
| 259 | + }; |
| 260 | + |
| 261 | + struct MarkdownTooltipCallbackData // for tooltips |
| 262 | + { |
| 263 | + MarkdownLinkCallbackData linkData; |
| 264 | + const char* linkIcon; |
| 265 | + }; |
| 266 | + |
| 267 | + struct MarkdownImageData |
| 268 | + { |
| 269 | + bool isValid = false; // if true, will draw the image |
| 270 | + bool useLinkCallback = false; // if true, linkCallback will be called when image is clicked |
| 271 | + ImTextureID user_texture_id = {}; // see ImGui::Image |
| 272 | + ImVec2 size = ImVec2( 100.0f, 100.0f ); // see ImGui::Image |
| 273 | + ImVec2 uv0 = ImVec2( 0, 0 ); // see ImGui::Image |
| 274 | + ImVec2 uv1 = ImVec2( 1, 1 ); // see ImGui::Image |
| 275 | + ImVec4 tint_col = ImVec4( 1, 1, 1, 1 ); // see ImGui::Image |
| 276 | + ImVec4 border_col = ImVec4( 0, 0, 0, 0 ); // see ImGui::Image |
| 277 | + ImVec4 bg_col = ImVec4( 0, 0, 0, 0 ); // see ImGui::Image |
| 278 | + }; |
| 279 | + |
| 280 | + enum class MarkdownFormatType |
| 281 | + { |
| 282 | + NORMAL_TEXT, |
| 283 | + HEADING, |
| 284 | + UNORDERED_LIST, |
| 285 | + LINK, |
| 286 | + EMPHASIS, |
| 287 | + }; |
| 288 | + |
| 289 | + struct MarkdownFormatInfo |
| 290 | + { |
| 291 | + MarkdownFormatType type = MarkdownFormatType::NORMAL_TEXT; |
| 292 | + int32_t level = 0; // Set for headings: 1 for H1, 2 for H2 etc. |
| 293 | + bool itemHovered = false; // Currently only set for links when mouse hovered, only valid when start_ == false |
| 294 | + const MarkdownConfig* config = NULL; |
| 295 | + const char* text = NULL; |
| 296 | + int32_t textLength = 0; |
| 297 | + }; |
| 298 | + |
| 299 | + typedef void MarkdownLinkCallback( MarkdownLinkCallbackData data ); |
| 300 | + typedef void MarkdownTooltipCallback( MarkdownTooltipCallbackData data ); |
| 301 | + |
| 302 | + inline void defaultMarkdownTooltipCallback( MarkdownTooltipCallbackData data_ ) |
| 303 | + { |
| 304 | + if( data_.linkData.isImage ) |
| 305 | + { |
| 306 | + ImGui::SetTooltip( "%.*s", data_.linkData.linkLength, data_.linkData.link ); |
| 307 | + } |
| 308 | + else |
| 309 | + { |
| 310 | + ImGui::SetTooltip( "%s Open in browser\n%.*s", data_.linkIcon, data_.linkData.linkLength, data_.linkData.link ); |
| 311 | + } |
| 312 | + } |
| 313 | + |
| 314 | + typedef MarkdownImageData MarkdownImageCallback( MarkdownLinkCallbackData data ); |
| 315 | + typedef void MarkdownFormalCallback( const MarkdownFormatInfo& markdownFormatInfo_, bool start_ ); |
| 316 | + |
| 317 | + inline void defaultMarkdownFormatCallback( const MarkdownFormatInfo& markdownFormatInfo_, bool start_ ); |
| 318 | + |
| 319 | + struct MarkdownHeadingFormat |
| 320 | + { |
| 321 | + ImFont* font; // ImGui font |
| 322 | + bool separator; // if true, an underlined separator is drawn after the header |
| 323 | + #ifdef IMGUI_HAS_TEXTURES // used to detect dynamic font capability: https://github.com/ocornut/imgui/issues/8465#issuecomment-2701570771 |
| 324 | + float fontSize = 0.0f; // Font size if using dynamic fonts |
| 325 | + #endif |
| 326 | + }; |
| 327 | + |
| 328 | + // Configuration struct for Markdown |
| 329 | + // - linkCallback is called when a link is clicked on |
| 330 | + // - linkIcon is a string which encode a "Link" icon, if available in the current font (e.g. linkIcon = ICON_FA_LINK with FontAwesome + IconFontCppHeaders https://github.com/juliettef/IconFontCppHeaders) |
| 331 | + // - headingFormats controls the format of heading H1 to H3, those above H3 use H3 format |
| 332 | + struct MarkdownConfig |
| 333 | + { |
| 334 | + static const int NUMHEADINGS = 3; |
| 335 | + |
| 336 | + MarkdownLinkCallback* linkCallback = NULL; |
| 337 | + MarkdownTooltipCallback* tooltipCallback = NULL; |
| 338 | + MarkdownImageCallback* imageCallback = NULL; |
| 339 | + const char* linkIcon = ""; // icon displayd in link tooltip |
| 340 | + MarkdownHeadingFormat headingFormats[ NUMHEADINGS ] = { { NULL, true }, { NULL, true }, { NULL, true } }; |
| 341 | + void* userData = NULL; |
| 342 | + MarkdownFormalCallback* formatCallback = defaultMarkdownFormatCallback; |
| 343 | + ImGuiMarkdownFormatFlags formatFlags = ImGuiMarkdownFormatFlags_None; // Configure this to change how Markdown gets formatted. By default imgui_markdown uses psuedo-Markdown for backwards compatibility. |
| 344 | + }; |
| 345 | + |
| 346 | + //----------------------------------------------------------------------------- |
| 347 | + // External interface |
| 348 | + //----------------------------------------------------------------------------- |
| 349 | + |
| 350 | + inline void Markdown( const char* markdown_, size_t markdownLength_, const MarkdownConfig& mdConfig_ ); |
| 351 | + |
| 352 | + //----------------------------------------------------------------------------- |
| 353 | + // Internals |
| 354 | + //----------------------------------------------------------------------------- |
| 355 | + |
| 356 | + struct TextRegion; |
| 357 | + struct Line; |
| 358 | + inline void UnderLine( ImColor col_ ); |
| 359 | + inline void RenderLine( const char* markdown_, Line& line_, TextRegion& textRegion_, const MarkdownConfig& mdConfig_ ); |
| 360 | + |
| 361 | + struct TextRegion |
| 362 | + { |
| 363 | + TextRegion() : indentX( 0.0f ) |
| 364 | + { |
| 365 | + } |
| 366 | + ~TextRegion() |
| 367 | + { |
| 368 | + ResetIndent(); |
| 369 | + } |
| 370 | + |
| 371 | + void RenderTextWrapped( const char* text_, const char* text_end_, bool bIndentToHere_ = false ); |
| 372 | + |
| 373 | + void RenderListTextWrapped( const char* text_, const char* text_end_ ) |
| 374 | + { |
| 375 | + ImGui::Bullet(); |
| 376 | + ImGui::SameLine(); |
| 377 | + RenderTextWrapped( text_, text_end_, true ); |
| 378 | + } |
| 379 | + |
| 380 | + bool RenderLinkText( const char* text_, const char* text_end_, const Link& link_, |
| 381 | + const char* markdown_, const MarkdownConfig& mdConfig_, const char** linkHoverStart_ ); |
| 382 | + |
| 383 | + void RenderLinkTextWrapped( const char* text_, const char* text_end_, const Link& link_, |
| 384 | + const char* markdown_, const MarkdownConfig& mdConfig_, const char** linkHoverStart_, bool bIndentToHere_ = false ); |
| 385 | + |
| 386 | + void ResetIndent() |
| 387 | + { |
| 388 | + if( indentX > 0.0f ) |
| 389 | + { |
| 390 | + ImGui::Unindent( indentX ); |
| 391 | + } |
| 392 | + indentX = 0.0f; |
| 393 | + } |
| 394 | + |
| 395 | + private: |
| 396 | + float indentX; |
| 397 | + }; |
| 398 | + |
| 399 | + // Text that starts after a new line (or at beginning) and ends with a newline (or at end) |
| 400 | + struct Line { |
| 401 | + bool isHeading = false; |
| 402 | + bool isEmphasis = false; |
| 403 | + bool isUnorderedListStart = false; |
| 404 | + bool isLeadingSpace = true; // spaces at start of line |
| 405 | + int leadSpaceCount = 0; |
| 406 | + int headingCount = 0; |
| 407 | + int emphasisCount = 0; |
| 408 | + int lineStart = 0; |
| 409 | + int lineEnd = 0; |
| 410 | + int lastRenderPosition = 0; // lines may get rendered in multiple pieces |
| 411 | + }; |
| 412 | + |
| 413 | + struct TextBlock { // subset of line |
| 414 | + int start = 0; |
| 415 | + int stop = 0; |
| 416 | + int size() const |
| 417 | + { |
| 418 | + return stop - start; |
| 419 | + } |
| 420 | + }; |
| 421 | + |
| 422 | + struct Link { |
| 423 | + enum LinkState { |
| 424 | + NO_LINK, |
| 425 | + HAS_SQUARE_BRACKET_OPEN, |
| 426 | + HAS_SQUARE_BRACKETS, |
| 427 | + HAS_SQUARE_BRACKETS_ROUND_BRACKET_OPEN, |
| 428 | + }; |
| 429 | + LinkState state = NO_LINK; |
| 430 | + TextBlock text; |
| 431 | + TextBlock url; |
| 432 | + bool isImage = false; |
| 433 | + int num_brackets_open = 0; |
| 434 | + }; |
| 435 | + |
| 436 | + struct Emphasis { |
| 437 | + enum EmphasisState { |
| 438 | + NONE, |
| 439 | + LEFT, |
| 440 | + MIDDLE, |
| 441 | + RIGHT, |
| 442 | + }; |
| 443 | + EmphasisState state = NONE; |
| 444 | + TextBlock text; |
| 445 | + char sym; |
| 446 | + }; |
| 447 | + |
| 448 | + inline void UnderLine( ImColor col_ ) |
| 449 | + { |
| 450 | + ImVec2 min = ImGui::GetItemRectMin(); |
| 451 | + ImVec2 max = ImGui::GetItemRectMax(); |
| 452 | + min.y = max.y; |
| 453 | + ImGui::GetWindowDrawList()->AddLine( min, max, col_, 1.0f ); |
| 454 | + } |
| 455 | + |
| 456 | + inline void RenderLine( const char* markdown_, Line& line_, TextRegion& textRegion_, const MarkdownConfig& mdConfig_ ) |
| 457 | + { |
| 458 | + // indent |
| 459 | + int indentStart = 0; |
| 460 | + if( line_.isUnorderedListStart ) // ImGui unordered list render always adds one indent |
| 461 | + { |
| 462 | + indentStart = 1; |
| 463 | + } |
| 464 | + for( int j = indentStart; j < line_.leadSpaceCount / 2; ++j ) // add indents |
| 465 | + { |
| 466 | + ImGui::Indent(); |
| 467 | + } |
| 468 | + |
| 469 | + // render |
| 470 | + MarkdownFormatInfo formatInfo; |
| 471 | + formatInfo.config = &mdConfig_; |
| 472 | + int textStart = line_.lastRenderPosition + 1; |
| 473 | + int textSize = line_.lineEnd - textStart; |
| 474 | + if( line_.isUnorderedListStart ) // render unordered list |
| 475 | + { |
| 476 | + formatInfo.type = MarkdownFormatType::UNORDERED_LIST; |
| 477 | + mdConfig_.formatCallback( formatInfo, true ); |
| 478 | + const char* text = markdown_ + textStart + 1; |
| 479 | + textRegion_.RenderListTextWrapped( text, text + textSize - 1 ); |
| 480 | + } |
| 481 | + else if( line_.isHeading ) // render heading |
| 482 | + { |
| 483 | + formatInfo.level = line_.headingCount; |
| 484 | + formatInfo.type = MarkdownFormatType::HEADING; |
| 485 | + const char* text = markdown_ + textStart + 1; |
| 486 | + formatInfo.text = text; |
| 487 | + formatInfo.textLength = textSize - 1; |
| 488 | + mdConfig_.formatCallback( formatInfo, true ); |
| 489 | + textRegion_.RenderTextWrapped( text, text + textSize - 1 ); |
| 490 | + } |
| 491 | + else if( line_.isEmphasis ) // render emphasis |
| 492 | + { |
| 493 | + formatInfo.level = line_.emphasisCount; |
| 494 | + formatInfo.type = MarkdownFormatType::EMPHASIS; |
| 495 | + mdConfig_.formatCallback(formatInfo, true); |
| 496 | + const char* text = markdown_ + textStart; |
| 497 | + textRegion_.RenderTextWrapped(text, text + textSize); |
| 498 | + } |
| 499 | + else // render a normal paragraph chunk |
| 500 | + { |
| 501 | + formatInfo.type = MarkdownFormatType::NORMAL_TEXT; |
| 502 | + mdConfig_.formatCallback( formatInfo, true ); |
| 503 | + const char* text = markdown_ + textStart; |
| 504 | + textRegion_.RenderTextWrapped( text, text + textSize ); |
| 505 | + } |
| 506 | + mdConfig_.formatCallback( formatInfo, false ); |
| 507 | + |
| 508 | + // unindent |
| 509 | + for( int j = indentStart; j < line_.leadSpaceCount / 2; ++j ) |
| 510 | + { |
| 511 | + ImGui::Unindent(); |
| 512 | + } |
| 513 | + } |
| 514 | + |
| 515 | + // render markdown |
| 516 | + inline void Markdown( const char* markdown_, size_t markdownLength_, const MarkdownConfig& mdConfig_ ) |
| 517 | + { |
| 518 | + static const char* s_linkHoverStart = NULL; // we need to preserve status of link hovering between frames |
| 519 | + static ImGuiID s_linkHoverID = 0; |
| 520 | + const char* linkHoverStart = NULL; |
| 521 | + ImGuiID linkHoverID = ImGui::GetID("MDLHS"); |
| 522 | + if( linkHoverID == s_linkHoverID ) |
| 523 | + { |
| 524 | + linkHoverStart = s_linkHoverStart; |
| 525 | + } |
| 526 | + |
| 527 | + ImGuiStyle& style = ImGui::GetStyle(); |
| 528 | + Line line; |
| 529 | + Line prevLine; |
| 530 | + Link link; |
| 531 | + Emphasis em; |
| 532 | + TextRegion textRegion; |
| 533 | + int concurrentEmptyNewlines = 0; |
| 534 | + bool appliedExtraNewline = false; |
| 535 | + |
| 536 | + char c = 0; |
| 537 | + for( int i=0; i < (int)markdownLength_; ++i ) |
| 538 | + { |
| 539 | + c = markdown_[i]; // get the character at index |
| 540 | + if( c == 0 ) { break; } // shouldn't happen but don't go beyond 0. |
| 541 | + |
| 542 | + // If we're at the beginning of the line, count any spaces |
| 543 | + if( line.isLeadingSpace ) |
| 544 | + { |
| 545 | + if ( (mdConfig_.formatFlags & ImGuiMarkdownFormatFlags_DiscardExtraNewLines) ) // Discard LF and CRLF newlines by markdown spec |
| 546 | + { |
| 547 | + if ( c == '\n' ) |
| 548 | + { |
| 549 | + concurrentEmptyNewlines++; |
| 550 | + line.lineStart += 1; |
| 551 | + continue; |
| 552 | + } |
| 553 | + else if ( ( c == '\r' ) && ( (int)markdownLength_ > i + 1 ) && ( markdown_[i + 1] == '\n' ) ) |
| 554 | + { |
| 555 | + concurrentEmptyNewlines++; |
| 556 | + line.lineStart += 2; |
| 557 | + i += 1; |
| 558 | + continue; |
| 559 | + } |
| 560 | + } |
| 561 | + |
| 562 | + if( c == ' ' ) |
| 563 | + { |
| 564 | + ++line.leadSpaceCount; |
| 565 | + continue; |
| 566 | + } |
| 567 | + else |
| 568 | + { |
| 569 | + line.isLeadingSpace = false; |
| 570 | + line.lastRenderPosition = i - 1; |
| 571 | + if(( c == '*' ) && ( line.leadSpaceCount >= 2 )) |
| 572 | + { |
| 573 | + if( ( (int)markdownLength_ > i + 1 ) && ( markdown_[ i + 1 ] == ' ' ) ) // space after '*' |
| 574 | + { |
| 575 | + line.isUnorderedListStart = true; |
| 576 | + ++i; |
| 577 | + ++line.lastRenderPosition; |
| 578 | + } |
| 579 | + // carry on processing as could be emphasis |
| 580 | + } |
| 581 | + else if( c == '#' ) |
| 582 | + { |
| 583 | + line.headingCount++; |
| 584 | + bool bContinueChecking = true; |
| 585 | + int j = i; |
| 586 | + while( ++j < (int)markdownLength_ && bContinueChecking ) |
| 587 | + { |
| 588 | + c = markdown_[j]; |
| 589 | + switch( c ) |
| 590 | + { |
| 591 | + case '#': |
| 592 | + line.headingCount++; |
| 593 | + break; |
| 594 | + case ' ': |
| 595 | + line.lastRenderPosition = j - 1; |
| 596 | + i = j; |
| 597 | + line.isHeading = true; |
| 598 | + bContinueChecking = false; |
| 599 | + break; |
| 600 | + default: |
| 601 | + line.isHeading = false; |
| 602 | + bContinueChecking = false; |
| 603 | + break; |
| 604 | + } |
| 605 | + } |
| 606 | + if( line.isHeading ) |
| 607 | + { |
| 608 | + // reset emphasis status, we do not support emphasis around headers for now |
| 609 | + em = Emphasis(); |
| 610 | + continue; |
| 611 | + } |
| 612 | + } |
| 613 | + } |
| 614 | + } |
| 615 | + |
| 616 | + if ( (mdConfig_.formatFlags & ImGuiMarkdownFormatFlags_DiscardExtraNewLines) ) |
| 617 | + { |
| 618 | + // In markdown spec, 2 or more consecutive newlines gets converted to a single blank |
| 619 | + // line. The first newline is always digested by this parser so we check for 1 or more here. |
| 620 | + if (!appliedExtraNewline && !prevLine.isHeading && concurrentEmptyNewlines >= 1) { |
| 621 | + ImGui::NewLine(); |
| 622 | + appliedExtraNewline = true; |
| 623 | + } |
| 624 | + } |
| 625 | + |
| 626 | + // Test to see if we have a link |
| 627 | + switch( link.state ) |
| 628 | + { |
| 629 | + case Link::NO_LINK: |
| 630 | + if( c == '[' && !line.isHeading ) // we do not support headings with links for now |
| 631 | + { |
| 632 | + link.state = Link::HAS_SQUARE_BRACKET_OPEN; |
| 633 | + link.text.start = i + 1; |
| 634 | + if( i > 0 && markdown_[i - 1] == '!' ) |
| 635 | + { |
| 636 | + link.isImage = true; |
| 637 | + } |
| 638 | + } |
| 639 | + break; |
| 640 | + case Link::HAS_SQUARE_BRACKET_OPEN: |
| 641 | + if( c == ']' ) |
| 642 | + { |
| 643 | + link.state = Link::HAS_SQUARE_BRACKETS; |
| 644 | + link.text.stop = i; |
| 645 | + } |
| 646 | + break; |
| 647 | + case Link::HAS_SQUARE_BRACKETS: |
| 648 | + if( c == '(' ) |
| 649 | + { |
| 650 | + link.state = Link::HAS_SQUARE_BRACKETS_ROUND_BRACKET_OPEN; |
| 651 | + link.url.start = i + 1; |
| 652 | + link.num_brackets_open = 1; |
| 653 | + } |
| 654 | + break; |
| 655 | + case Link::HAS_SQUARE_BRACKETS_ROUND_BRACKET_OPEN: |
| 656 | + if( c == '(' ) |
| 657 | + { |
| 658 | + ++link.num_brackets_open; |
| 659 | + } |
| 660 | + else if( c == ')' ) |
| 661 | + { |
| 662 | + --link.num_brackets_open; |
| 663 | + } |
| 664 | + if( link.num_brackets_open == 0 ) |
| 665 | + { |
| 666 | + // reset emphasis status, we do not support emphasis around links for now |
| 667 | + em = Emphasis(); |
| 668 | + // render previous line content |
| 669 | + line.lineEnd = link.text.start - ( link.isImage ? 2 : 1 ); |
| 670 | + RenderLine( markdown_, line, textRegion, mdConfig_ ); |
| 671 | + line.leadSpaceCount = 0; |
| 672 | + link.url.stop = i; |
| 673 | + line.isUnorderedListStart = false; // the following text shouldn't have bullets |
| 674 | + ImGui::SameLine( 0.0f, 0.0f ); |
| 675 | + if( link.isImage ) // it's an image, render it. |
| 676 | + { |
| 677 | + bool drawnImage = false; |
| 678 | + bool useLinkCallback = false; |
| 679 | + if( mdConfig_.imageCallback ) |
| 680 | + { |
| 681 | + MarkdownImageData imageData = mdConfig_.imageCallback( { markdown_ + link.text.start, link.text.size(), markdown_ + link.url.start, link.url.size(), mdConfig_.userData, true } ); |
| 682 | + useLinkCallback = imageData.useLinkCallback; |
| 683 | + if( imageData.isValid ) |
| 684 | + { |
| 685 | +#if IMGUI_VERSION_NUM < 19185 |
| 686 | + if( imageData.bg_col.w > 0.0f ) |
| 687 | + { |
| 688 | + ImVec2 p = ImGui::GetCursorScreenPos(); |
| 689 | + ImGui::GetWindowDrawList()->AddRectFilled( p, ImVec2( p.x + imageData.size.x, p.y + imageData.size.y ), ImGui::GetColorU32( imageData.bg_col )); |
| 690 | + } |
| 691 | + ImGui::Image( imageData.user_texture_id, imageData.size, imageData.uv0, imageData.uv1, imageData.tint_col, imageData.border_col ); |
| 692 | +#else |
| 693 | + ImGui::PushStyleColor( ImGuiCol_Border, imageData.border_col ); |
| 694 | + ImGui::ImageWithBg( imageData.user_texture_id, imageData.size, imageData.uv0, imageData.uv1, imageData.bg_col, imageData.tint_col ); |
| 695 | + ImGui::PopStyleColor(); |
| 696 | +#endif |
| 697 | + drawnImage = true; |
| 698 | + } |
| 699 | + } |
| 700 | + if( !drawnImage ) |
| 701 | + { |
| 702 | + ImGui::Text( "( Image %.*s not loaded )", link.url.size(), markdown_ + link.url.start ); |
| 703 | + } |
| 704 | + if( ImGui::IsItemHovered() ) |
| 705 | + { |
| 706 | + if( ImGui::IsMouseReleased( 0 ) && mdConfig_.linkCallback && useLinkCallback ) |
| 707 | + { |
| 708 | + mdConfig_.linkCallback( { markdown_ + link.text.start, link.text.size(), markdown_ + link.url.start, link.url.size(), mdConfig_.userData, true } ); |
| 709 | + } |
| 710 | + if( link.text.size() > 0 && mdConfig_.tooltipCallback ) |
| 711 | + { |
| 712 | + mdConfig_.tooltipCallback( { { markdown_ + link.text.start, link.text.size(), markdown_ + link.url.start, link.url.size(), mdConfig_.userData, true }, mdConfig_.linkIcon } ); |
| 713 | + } |
| 714 | + } |
| 715 | + } |
| 716 | + else // it's a link, render it. |
| 717 | + { |
| 718 | + textRegion.RenderLinkTextWrapped( markdown_ + link.text.start, markdown_ + link.text.start + link.text.size(), link, markdown_, mdConfig_, &linkHoverStart, false ); |
| 719 | + } |
| 720 | + ImGui::SameLine( 0.0f, 0.0f ); |
| 721 | + // reset the link by reinitializing it |
| 722 | + link = Link(); |
| 723 | + line.lastRenderPosition = i; |
| 724 | + break; |
| 725 | + } |
| 726 | + } |
| 727 | + |
| 728 | + // Test to see if we have emphasis styling |
| 729 | + switch( em.state ) |
| 730 | + { |
| 731 | + case Emphasis::NONE: |
| 732 | + if( link.state == Link::NO_LINK && !line.isHeading ) |
| 733 | + { |
| 734 | + int next = i + 1; |
| 735 | + int prev = i - 1; |
| 736 | + if( ( c == '*' || c == '_' ) |
| 737 | + && ( i == line.lineStart |
| 738 | + || markdown_[ prev ] == ' ' |
| 739 | + || markdown_[ prev ] == '\t' ) // empasis must be preceded by whitespace or line start |
| 740 | + && (int)markdownLength_ > next // emphasis must precede non-whitespace |
| 741 | + && markdown_[ next ] != ' ' |
| 742 | + && markdown_[ next ] != '\n' |
| 743 | + && markdown_[ next ] != '\t' ) |
| 744 | + { |
| 745 | + em.state = Emphasis::LEFT; |
| 746 | + em.sym = c; |
| 747 | + em.text.start = i; |
| 748 | + line.emphasisCount = 1; |
| 749 | + continue; |
| 750 | + } |
| 751 | + } |
| 752 | + break; |
| 753 | + case Emphasis::LEFT: |
| 754 | + if( em.sym == c ) |
| 755 | + { |
| 756 | + ++line.emphasisCount; |
| 757 | + continue; |
| 758 | + } |
| 759 | + else |
| 760 | + { |
| 761 | + em.text.start = i; |
| 762 | + em.state = Emphasis::MIDDLE; |
| 763 | + } |
| 764 | + break; |
| 765 | + case Emphasis::MIDDLE: |
| 766 | + if( em.sym == c ) |
| 767 | + { |
| 768 | + em.state = Emphasis::RIGHT; |
| 769 | + em.text.stop = i; |
| 770 | + // pass through to case Emphasis::RIGHT |
| 771 | + } |
| 772 | + else |
| 773 | + { |
| 774 | + break; |
| 775 | + } |
| 776 | + #if __cplusplus >= 201703L |
| 777 | + [[fallthrough]]; |
| 778 | + #endif |
| 779 | + case Emphasis::RIGHT: |
| 780 | + if( em.sym == c ) |
| 781 | + { |
| 782 | + if( line.emphasisCount < 3 && ( i - em.text.stop + 1 == line.emphasisCount ) ) |
| 783 | + { |
| 784 | + // render text up to emphasis |
| 785 | + int lineEnd = em.text.start - line.emphasisCount; |
| 786 | + if( lineEnd > line.lineStart ) |
| 787 | + { |
| 788 | + line.lineEnd = lineEnd; |
| 789 | + RenderLine( markdown_, line, textRegion, mdConfig_ ); |
| 790 | + ImGui::SameLine( 0.0f, 0.0f ); |
| 791 | + line.isUnorderedListStart = false; |
| 792 | + line.leadSpaceCount = 0; |
| 793 | + } |
| 794 | + line.isEmphasis = true; |
| 795 | + line.lastRenderPosition = em.text.start - 1; |
| 796 | + line.lineStart = em.text.start; |
| 797 | + line.lineEnd = em.text.stop; |
| 798 | + RenderLine( markdown_, line, textRegion, mdConfig_ ); |
| 799 | + ImGui::SameLine( 0.0f, 0.0f ); |
| 800 | + line.isEmphasis = false; |
| 801 | + line.lastRenderPosition = i; |
| 802 | + em = Emphasis(); |
| 803 | + } |
| 804 | + continue; |
| 805 | + } |
| 806 | + else |
| 807 | + { |
| 808 | + em.state = Emphasis::NONE; |
| 809 | + // render text up to here |
| 810 | + int start = em.text.start - line.emphasisCount; |
| 811 | + if( start < line.lineStart ) |
| 812 | + { |
| 813 | + line.lineEnd = line.lineStart; |
| 814 | + line.lineStart = start; |
| 815 | + line.lastRenderPosition = start - 1; |
| 816 | + RenderLine( markdown_, line, textRegion, mdConfig_ ); |
| 817 | + line.lineStart = line.lineEnd; |
| 818 | + line.lastRenderPosition = line.lineStart - 1; |
| 819 | + } |
| 820 | + } |
| 821 | + break; |
| 822 | + } |
| 823 | + |
| 824 | + // handle end of line (render) |
| 825 | + if( c == '\n' ) |
| 826 | + { |
| 827 | + // first check if the line is a horizontal rule |
| 828 | + line.lineEnd = i; |
| 829 | + if( em.state == Emphasis::MIDDLE && line.emphasisCount >=3 && |
| 830 | + ( line.lineStart + line.emphasisCount ) == i ) |
| 831 | + { |
| 832 | + ImGui::Separator(); |
| 833 | + } |
| 834 | + else |
| 835 | + { |
| 836 | + // render the line: multiline emphasis requires a complex implementation so not supporting |
| 837 | + RenderLine( markdown_, line, textRegion, mdConfig_ ); |
| 838 | + } |
| 839 | + |
| 840 | + // reset the line and emphasis state |
| 841 | + prevLine = line; |
| 842 | + line = Line(); |
| 843 | + em = Emphasis(); |
| 844 | + |
| 845 | + line.lineStart = i + 1; |
| 846 | + line.lastRenderPosition = i; |
| 847 | + |
| 848 | + textRegion.ResetIndent(); |
| 849 | + |
| 850 | + // reset the link |
| 851 | + link = Link(); |
| 852 | + |
| 853 | + concurrentEmptyNewlines = 0; |
| 854 | + appliedExtraNewline = false; |
| 855 | + } |
| 856 | + } |
| 857 | + |
| 858 | + if( em.state == Emphasis::LEFT && line.emphasisCount >= 3 ) |
| 859 | + { |
| 860 | + ImGui::Separator(); |
| 861 | + } |
| 862 | + else |
| 863 | + { |
| 864 | + // render any remaining text if last char wasn't 0 |
| 865 | + if( markdownLength_ && line.lineStart < (int)markdownLength_ && markdown_[ line.lineStart ] != 0 ) |
| 866 | + { |
| 867 | + // handle both null terminated and non null terminated strings |
| 868 | + line.lineEnd = (int)markdownLength_; |
| 869 | + if( 0 == markdown_[ line.lineEnd - 1 ] ) |
| 870 | + { |
| 871 | + --line.lineEnd; |
| 872 | + } |
| 873 | + RenderLine( markdown_, line, textRegion, mdConfig_ ); |
| 874 | + } |
| 875 | + } |
| 876 | + |
| 877 | + if( NULL != linkHoverStart || linkHoverID == s_linkHoverID ) |
| 878 | + { |
| 879 | + s_linkHoverStart = linkHoverStart; |
| 880 | + s_linkHoverID = linkHoverID; |
| 881 | + } |
| 882 | + } |
| 883 | + |
| 884 | + inline bool TextRegion::RenderLinkText( const char* text_, const char* text_end_, const Link& link_, |
| 885 | + const char* markdown_, const MarkdownConfig& mdConfig_, const char** linkHoverStart_ ) |
| 886 | + { |
| 887 | + MarkdownFormatInfo formatInfo; |
| 888 | + formatInfo.config = &mdConfig_; |
| 889 | + formatInfo.type = MarkdownFormatType::LINK; |
| 890 | + mdConfig_.formatCallback( formatInfo, true ); |
| 891 | + ImGui::PushTextWrapPos( -1.0f ); |
| 892 | + ImGui::TextUnformatted( text_, text_end_ ); |
| 893 | + ImGui::PopTextWrapPos(); |
| 894 | + |
| 895 | + bool bThisItemHovered = ImGui::IsItemHovered(); |
| 896 | + if(bThisItemHovered) |
| 897 | + { |
| 898 | + *linkHoverStart_ = markdown_ + link_.text.start; |
| 899 | + } |
| 900 | + bool bHovered = bThisItemHovered || ( *linkHoverStart_ == ( markdown_ + link_.text.start ) ); |
| 901 | + |
| 902 | + formatInfo.itemHovered = bHovered; |
| 903 | + mdConfig_.formatCallback( formatInfo, false ); |
| 904 | + |
| 905 | + if(bHovered) |
| 906 | + { |
| 907 | + if( ImGui::IsMouseReleased( 0 ) && mdConfig_.linkCallback ) |
| 908 | + { |
| 909 | + mdConfig_.linkCallback( { markdown_ + link_.text.start, link_.text.size(), markdown_ + link_.url.start, link_.url.size(), mdConfig_.userData, false } ); |
| 910 | + } |
| 911 | + if( mdConfig_.tooltipCallback ) |
| 912 | + { |
| 913 | + mdConfig_.tooltipCallback( { { markdown_ + link_.text.start, link_.text.size(), markdown_ + link_.url.start, link_.url.size(), mdConfig_.userData, false }, mdConfig_.linkIcon } ); |
| 914 | + } |
| 915 | + } |
| 916 | + return bThisItemHovered; |
| 917 | + } |
| 918 | + |
| 919 | + // IsCharInsideWord based on ImGui's CalcWordWrapPositionA |
| 920 | + inline bool IsCharInsideWord( char c_ ) |
| 921 | + { |
| 922 | + return c_ != ' ' && c_ != '.' && c_ != ',' && c_ != ';' && c_ != '!' && c_ != '?' && c_ != '\"'; |
| 923 | + } |
| 924 | + |
| 925 | + // ImGui::TextWrapped will wrap at the starting position |
| 926 | + // so to work around this we render using our own wrapping for the first line |
| 927 | + inline void TextRegion::RenderTextWrapped( const char* text_, const char* text_end_, bool bIndentToHere_ ) |
| 928 | + { |
| 929 | + #if IMGUI_VERSION_NUM >= 19197 |
| 930 | + float fontSize = ImGui::GetFontSize(); |
| 931 | + #else |
| 932 | + float scale = ImGui::GetIO().FontGlobalScale; |
| 933 | + #endif |
| 934 | + float widthLeft = GetContentRegionAvail().x; |
| 935 | + const char* endLine = text_; |
| 936 | + if( widthLeft > 0.0f ) |
| 937 | + { |
| 938 | + #if IMGUI_VERSION_NUM >= 19197 |
| 939 | + endLine = ImGui::GetFont()->CalcWordWrapPosition( fontSize, text_, text_end_, widthLeft ); |
| 940 | + #else |
| 941 | + endLine = ImGui::GetFont()->CalcWordWrapPositionA( scale, text_, text_end_, widthLeft ); |
| 942 | + #endif |
| 943 | + } |
| 944 | + |
| 945 | + if( endLine > text_ && endLine < text_end_ ) |
| 946 | + { |
| 947 | + if( IsCharInsideWord( *endLine ) ) |
| 948 | + { |
| 949 | + // see if we can do a better cut. |
| 950 | + float widthNextLine = widthLeft + GetCursorScreenPos().x - GetWindowPos().x; // was GetContentRegionMax().x on IMGUI_VERSION_NUM < 19099 |
| 951 | + #if IMGUI_VERSION_NUM >= 19197 |
| 952 | + const char* endNextLine = ImGui::GetFont()->CalcWordWrapPosition( fontSize, text_, text_end_, widthNextLine ); |
| 953 | + #else |
| 954 | + const char* endNextLine = ImGui::GetFont()->CalcWordWrapPositionA( scale, text_, text_end_, widthNextLine ); |
| 955 | + #endif |
| 956 | + if( endNextLine == text_end_ || ( endNextLine <= text_end_ && !IsCharInsideWord( *endNextLine ) ) ) |
| 957 | + { |
| 958 | + // can possibly do better if go to next line |
| 959 | + endLine = text_; |
| 960 | + } |
| 961 | + } |
| 962 | + } |
| 963 | + ImGui::TextUnformatted( text_, endLine ); |
| 964 | + if( bIndentToHere_ ) |
| 965 | + { |
| 966 | + float indentNeeded = GetContentRegionAvail().x - widthLeft; |
| 967 | + if( indentNeeded ) |
| 968 | + { |
| 969 | + ImGui::Indent( indentNeeded ); |
| 970 | + indentX += indentNeeded; |
| 971 | + } |
| 972 | + } |
| 973 | + widthLeft = GetContentRegionAvail().x; |
| 974 | + while( endLine < text_end_ ) |
| 975 | + { |
| 976 | + text_ = endLine; |
| 977 | + if( *text_ == ' ' ) { ++text_; } // skip a space at start of line |
| 978 | + #if IMGUI_VERSION_NUM >= 19197 |
| 979 | + endLine = ImGui::GetFont()->CalcWordWrapPosition( fontSize, text_, text_end_, widthLeft ); |
| 980 | + #else |
| 981 | + endLine = ImGui::GetFont()->CalcWordWrapPositionA( scale, text_, text_end_, widthLeft ); |
| 982 | + #endif |
| 983 | + if( text_ == endLine ) |
| 984 | + { |
| 985 | + endLine++; |
| 986 | + } |
| 987 | + ImGui::TextUnformatted( text_, endLine ); |
| 988 | + } |
| 989 | + } |
| 990 | + |
| 991 | + inline void TextRegion::RenderLinkTextWrapped( const char* text_, const char* text_end_, const Link& link_, |
| 992 | + const char* markdown_, const MarkdownConfig& mdConfig_, const char** linkHoverStart_, bool bIndentToHere_ ) |
| 993 | + { |
| 994 | + #if IMGUI_VERSION_NUM >= 19197 |
| 995 | + float fontSize = ImGui::GetFontSize(); |
| 996 | + #else |
| 997 | + float scale = ImGui::GetIO().FontGlobalScale; |
| 998 | + #endif |
| 999 | + float widthLeft = GetContentRegionAvail().x; |
| 1000 | + const char* endLine = text_; |
| 1001 | + if( widthLeft > 0.0f ) |
| 1002 | + { |
| 1003 | + #if IMGUI_VERSION_NUM >= 19197 |
| 1004 | + endLine = ImGui::GetFont()->CalcWordWrapPosition( fontSize, text_, text_end_, widthLeft ); |
| 1005 | + #else |
| 1006 | + endLine = ImGui::GetFont()->CalcWordWrapPositionA( scale, text_, text_end_, widthLeft ); |
| 1007 | + #endif |
| 1008 | + } |
| 1009 | + |
| 1010 | + if( endLine > text_ && endLine < text_end_ ) |
| 1011 | + { |
| 1012 | + if( IsCharInsideWord( *endLine ) ) |
| 1013 | + { |
| 1014 | + // see if we can do a better cut. |
| 1015 | + float widthNextLine = widthLeft + GetCursorScreenPos().x - GetWindowPos().x; // was GetContentRegionMax().x on IMGUI_VERSION_NUM < 19099 |
| 1016 | + #if IMGUI_VERSION_NUM >= 19197 |
| 1017 | + const char* endNextLine = ImGui::GetFont()->CalcWordWrapPosition( fontSize, text_, text_end_, widthNextLine ); |
| 1018 | + #else |
| 1019 | + const char* endNextLine = ImGui::GetFont()->CalcWordWrapPositionA( scale, text_, text_end_, widthNextLine ); |
| 1020 | + #endif |
| 1021 | + if( endNextLine == text_end_ || ( endNextLine <= text_end_ && !IsCharInsideWord( *endNextLine ) ) ) |
| 1022 | + { |
| 1023 | + // can possibly do better if go to next line |
| 1024 | + endLine = text_; |
| 1025 | + } |
| 1026 | + } |
| 1027 | + } |
| 1028 | + bool bHovered = RenderLinkText( text_, endLine, link_, markdown_, mdConfig_, linkHoverStart_ ); |
| 1029 | + if( bIndentToHere_ ) |
| 1030 | + { |
| 1031 | + float indentNeeded = GetContentRegionAvail().x - widthLeft; |
| 1032 | + if( indentNeeded ) |
| 1033 | + { |
| 1034 | + ImGui::Indent( indentNeeded ); |
| 1035 | + indentX += indentNeeded; |
| 1036 | + } |
| 1037 | + } |
| 1038 | + widthLeft = GetContentRegionAvail().x; |
| 1039 | + while( endLine < text_end_ ) |
| 1040 | + { |
| 1041 | + text_ = endLine; |
| 1042 | + if( *text_ == ' ' ) { ++text_; } // skip a space at start of line |
| 1043 | + #if IMGUI_VERSION_NUM >= 19197 |
| 1044 | + endLine = ImGui::GetFont()->CalcWordWrapPosition( fontSize, text_, text_end_, widthLeft ); |
| 1045 | + #else |
| 1046 | + endLine = ImGui::GetFont()->CalcWordWrapPositionA( scale, text_, text_end_, widthLeft ); |
| 1047 | + #endif |
| 1048 | + if( text_ == endLine ) |
| 1049 | + { |
| 1050 | + endLine++; |
| 1051 | + } |
| 1052 | + bool bThisLineHovered = RenderLinkText( text_, endLine, link_, markdown_, mdConfig_, linkHoverStart_ ); |
| 1053 | + bHovered = bHovered || bThisLineHovered; |
| 1054 | + } |
| 1055 | + if( !bHovered && *linkHoverStart_ == markdown_ + link_.text.start ) |
| 1056 | + { |
| 1057 | + *linkHoverStart_ = NULL; |
| 1058 | + } |
| 1059 | + } |
| 1060 | + |
| 1061 | + |
| 1062 | + inline void defaultMarkdownFormatCallback( const MarkdownFormatInfo& markdownFormatInfo_, bool start_ ) |
| 1063 | + { |
| 1064 | + switch( markdownFormatInfo_.type ) |
| 1065 | + { |
| 1066 | + case MarkdownFormatType::NORMAL_TEXT: |
| 1067 | + break; |
| 1068 | + case MarkdownFormatType::EMPHASIS: |
| 1069 | + { |
| 1070 | + MarkdownHeadingFormat fmt; |
| 1071 | + // default styling for emphasis uses last headingFormats - for your own styling |
| 1072 | + // implement EMPHASIS in your formatCallback |
| 1073 | + if( markdownFormatInfo_.level == 1 ) |
| 1074 | + { |
| 1075 | + // normal emphasis |
| 1076 | + if( start_ ) |
| 1077 | + { |
| 1078 | + ImGui::PushStyleColor( ImGuiCol_Text, ImGui::GetStyle().Colors[ ImGuiCol_TextDisabled ] ); |
| 1079 | + } |
| 1080 | + else |
| 1081 | + { |
| 1082 | + ImGui::PopStyleColor(); |
| 1083 | + } |
| 1084 | + } |
| 1085 | + else |
| 1086 | + { |
| 1087 | + // strong emphasis |
| 1088 | + fmt = markdownFormatInfo_.config->headingFormats[ MarkdownConfig::NUMHEADINGS - 1 ]; |
| 1089 | + if( start_ ) |
| 1090 | + { |
| 1091 | + if( fmt.font ) |
| 1092 | + { |
| 1093 | + #ifdef IMGUI_HAS_TEXTURES // used to detect dynamic font capability: |
| 1094 | + ImGui::PushFont( fmt.font, 0.0f ); // Change font and keep current size |
| 1095 | + #else |
| 1096 | + ImGui::PushFont( fmt.font ); |
| 1097 | + #endif |
| 1098 | + } |
| 1099 | + } |
| 1100 | + else |
| 1101 | + { |
| 1102 | + if( fmt.font ) |
| 1103 | + { |
| 1104 | + ImGui::PopFont(); |
| 1105 | + } |
| 1106 | + } |
| 1107 | + } |
| 1108 | + break; |
| 1109 | + } |
| 1110 | + case MarkdownFormatType::HEADING: |
| 1111 | + { |
| 1112 | + MarkdownHeadingFormat fmt; |
| 1113 | + if( markdownFormatInfo_.level > MarkdownConfig::NUMHEADINGS ) |
| 1114 | + { |
| 1115 | + fmt = markdownFormatInfo_.config->headingFormats[ MarkdownConfig::NUMHEADINGS - 1 ]; |
| 1116 | + } |
| 1117 | + else |
| 1118 | + { |
| 1119 | + fmt = markdownFormatInfo_.config->headingFormats[ markdownFormatInfo_.level - 1 ]; |
| 1120 | + } |
| 1121 | + if (start_) |
| 1122 | + { |
| 1123 | + if ( 0 == ( markdownFormatInfo_.config->formatFlags & ImGuiMarkdownFormatFlags_NoNewLineBeforeHeading ) ) |
| 1124 | + { |
| 1125 | + ImGui::NewLine(); |
| 1126 | + } |
| 1127 | + if (fmt.font) |
| 1128 | + { |
| 1129 | +#ifdef IMGUI_HAS_TEXTURES // used to detect dynamic font capability: https://github.com/ocornut/imgui/issues/8465#issuecomment-2701570771 |
| 1130 | + ImGui::PushFont(fmt.font, fmt.fontSize > 0.0f ? fmt.fontSize : fmt.font->LegacySize); |
| 1131 | +#else |
| 1132 | + ImGui::PushFont(fmt.font); |
| 1133 | +#endif |
| 1134 | + } |
| 1135 | + } |
| 1136 | + else |
| 1137 | + { |
| 1138 | + if (fmt.separator) |
| 1139 | + { |
| 1140 | + // In markdown the separator does not advance the cursor |
| 1141 | + ImVec2 cursor = ImGui::GetCursorPos(); |
| 1142 | + ImGui::Separator(); |
| 1143 | + if ( (markdownFormatInfo_.config->formatFlags & ImGuiMarkdownFormatFlags_SeparatorDoesNotAdvance) ) { |
| 1144 | + ImGui::SetCursorPos(cursor); |
| 1145 | + } |
| 1146 | + } |
| 1147 | + if (fmt.font) |
| 1148 | + { |
| 1149 | + ImGui::PopFont(); |
| 1150 | + } |
| 1151 | + ImGui::NewLine(); |
| 1152 | + } |
| 1153 | + break; |
| 1154 | + } |
| 1155 | + case MarkdownFormatType::UNORDERED_LIST: |
| 1156 | + break; |
| 1157 | + case MarkdownFormatType::LINK: |
| 1158 | + if( start_ ) |
| 1159 | + { |
| 1160 | + ImGui::PushStyleColor( ImGuiCol_Text, ImGui::GetStyle().Colors[ ImGuiCol_ButtonHovered ] ); |
| 1161 | + } |
| 1162 | + else |
| 1163 | + { |
| 1164 | + ImGui::PopStyleColor(); |
| 1165 | + if( markdownFormatInfo_.itemHovered ) |
| 1166 | + { |
| 1167 | + ImGui::UnderLine( ImGui::GetStyle().Colors[ ImGuiCol_ButtonHovered ] ); |
| 1168 | + } |
| 1169 | + else |
| 1170 | + { |
| 1171 | + ImGui::UnderLine( ImGui::GetStyle().Colors[ ImGuiCol_Button ] ); |
| 1172 | + } |
| 1173 | + } |
| 1174 | + break; |
| 1175 | + } |
| 1176 | + } |
| 1177 | +} |