Rename fpdfsdk/fpdf* files to be consistent

This CL makes the fpdfsdk/fpdf* files to be consistently prefixed with
fpdf_ instead of randomly dropping the _.

Change-Id: I23e3c8a0831b56bcd17c788d9fe874b2ab8b24fc
Reviewed-on: https://pdfium-review.googlesource.com/29390
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>

1 files changed, 393 insertions, 0 deletions

diff --git a/fpdfsdk/fpdf_text.cpp b/fpdfsdk/fpdf_text.cpp
new file mode 100644
index 0000000000..7778696931
--- /dev/null
+++ b/fpdfsdk/fpdf_text.cpp
@@ -0,0 +1,393 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "public/fpdf_text.h"
+
+#include <algorithm>
+#include <vector>
+
+#include "core/fpdfapi/page/cpdf_page.h"
+#include "core/fpdfdoc/cpdf_viewerpreferences.h"
+#include "core/fpdftext/cpdf_linkextract.h"
+#include "core/fpdftext/cpdf_textpage.h"
+#include "core/fpdftext/cpdf_textpagefind.h"
+#include "fpdfsdk/cpdfsdk_helpers.h"
+#include "third_party/base/numerics/safe_conversions.h"
+#include "third_party/base/stl_util.h"
+
+#ifdef PDF_ENABLE_XFA
+#include "fpdfsdk/fpdfxfa/cpdfxfa_context.h"
+#include "fpdfsdk/fpdfxfa/cpdfxfa_page.h"
+#endif  // PDF_ENABLE_XFA
+
+#ifdef _WIN32
+#include <tchar.h>
+#endif
+
+namespace {
+
+constexpr size_t kBytesPerCharacter = sizeof(unsigned short);
+
+CPDF_TextPage* CPDFTextPageFromFPDFTextPage(FPDF_TEXTPAGE text_page) {
+  return static_cast<CPDF_TextPage*>(text_page);
+}
+
+CPDF_TextPageFind* CPDFTextPageFindFromFPDFSchHandle(FPDF_SCHHANDLE handle) {
+  return static_cast<CPDF_TextPageFind*>(handle);
+}
+
+CPDF_LinkExtract* CPDFLinkExtractFromFPDFPageLink(FPDF_PAGELINK link) {
+  return static_cast<CPDF_LinkExtract*>(link);
+}
+
+}  // namespace
+
+FPDF_EXPORT FPDF_TEXTPAGE FPDF_CALLCONV FPDFText_LoadPage(FPDF_PAGE page) {
+  CPDF_Page* pPDFPage = CPDFPageFromFPDFPage(page);
+  if (!pPDFPage)
+    return nullptr;
+
+#ifdef PDF_ENABLE_XFA
+  CPDFXFA_Page* pPage = (CPDFXFA_Page*)page;
+  CPDFXFA_Context* pContext = pPage->GetContext();
+  CPDF_ViewerPreferences viewRef(pContext->GetPDFDoc());
+#else  // PDF_ENABLE_XFA
+  CPDF_ViewerPreferences viewRef(pPDFPage->m_pDocument.Get());
+#endif  // PDF_ENABLE_XFA
+
+  CPDF_TextPage* textpage = new CPDF_TextPage(
+      pPDFPage, viewRef.IsDirectionR2L() ? FPDFText_Direction::Right
+                                         : FPDFText_Direction::Left);
+  textpage->ParseTextPage();
+  return textpage;
+}
+
+FPDF_EXPORT void FPDF_CALLCONV FPDFText_ClosePage(FPDF_TEXTPAGE text_page) {
+  delete CPDFTextPageFromFPDFTextPage(text_page);
+}
+
+FPDF_EXPORT int FPDF_CALLCONV FPDFText_CountChars(FPDF_TEXTPAGE text_page) {
+  if (!text_page)
+    return -1;
+
+  CPDF_TextPage* textpage = CPDFTextPageFromFPDFTextPage(text_page);
+  return textpage->CountChars();
+}
+
+FPDF_EXPORT unsigned int FPDF_CALLCONV
+FPDFText_GetUnicode(FPDF_TEXTPAGE text_page, int index) {
+  if (!text_page)
+    return 0;
+
+  CPDF_TextPage* textpage = CPDFTextPageFromFPDFTextPage(text_page);
+  if (index < 0 || index >= textpage->CountChars())
+    return 0;
+
+  FPDF_CHAR_INFO charinfo;
+  textpage->GetCharInfo(index, &charinfo);
+  return charinfo.m_Unicode;
+}
+
+FPDF_EXPORT double FPDF_CALLCONV FPDFText_GetFontSize(FPDF_TEXTPAGE text_page,
+                                                      int index) {
+  if (!text_page)
+    return 0;
+  CPDF_TextPage* textpage = CPDFTextPageFromFPDFTextPage(text_page);
+
+  if (index < 0 || index >= textpage->CountChars())
+    return 0;
+
+  FPDF_CHAR_INFO charinfo;
+  textpage->GetCharInfo(index, &charinfo);
+  return charinfo.m_FontSize;
+}
+
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFText_GetCharBox(FPDF_TEXTPAGE text_page,
+                                                        int index,
+                                                        double* left,
+                                                        double* right,
+                                                        double* bottom,
+                                                        double* top) {
+  if (!text_page || index < 0)
+    return false;
+
+  CPDF_TextPage* textpage = CPDFTextPageFromFPDFTextPage(text_page);
+  if (index >= textpage->CountChars())
+    return false;
+
+  FPDF_CHAR_INFO charinfo;
+  textpage->GetCharInfo(index, &charinfo);
+  *left = charinfo.m_CharBox.left;
+  *right = charinfo.m_CharBox.right;
+  *bottom = charinfo.m_CharBox.bottom;
+  *top = charinfo.m_CharBox.top;
+  return true;
+}
+
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
+FPDFText_GetCharOrigin(FPDF_TEXTPAGE text_page,
+                       int index,
+                       double* x,
+                       double* y) {
+  if (!text_page)
+    return false;
+  CPDF_TextPage* textpage = CPDFTextPageFromFPDFTextPage(text_page);
+
+  if (index < 0 || index >= textpage->CountChars())
+    return false;
+  FPDF_CHAR_INFO charinfo;
+  textpage->GetCharInfo(index, &charinfo);
+  *x = charinfo.m_Origin.x;
+  *y = charinfo.m_Origin.y;
+  return true;
+}
+
+// select
+FPDF_EXPORT int FPDF_CALLCONV
+FPDFText_GetCharIndexAtPos(FPDF_TEXTPAGE text_page,
+                           double x,
+                           double y,
+                           double xTolerance,
+                           double yTolerance) {
+  if (!text_page)
+    return -3;
+
+  CPDF_TextPage* textpage = CPDFTextPageFromFPDFTextPage(text_page);
+  return textpage->GetIndexAtPos(
+      CFX_PointF(static_cast<float>(x), static_cast<float>(y)),
+      CFX_SizeF(static_cast<float>(xTolerance),
+                static_cast<float>(yTolerance)));
+}
+
+FPDF_EXPORT int FPDF_CALLCONV FPDFText_GetText(FPDF_TEXTPAGE page,
+                                               int char_start,
+                                               int char_count,
+                                               unsigned short* result) {
+  if (!page || char_start < 0 || char_count < 0 || !result)
+    return 0;
+
+  CPDF_TextPage* textpage = CPDFTextPageFromFPDFTextPage(page);
+  int char_available = textpage->CountChars() - char_start;
+  if (char_available <= 0)
+    return 0;
+
+  char_count = std::min(char_count, char_available);
+  if (char_count == 0) {
+    // Writing out "", which has a character count of 1 due to the NUL.
+    *result = '\0';
+    return 1;
+  }
+
+  WideString str = textpage->GetPageText(char_start, char_count);
+
+  if (str.GetLength() > static_cast<size_t>(char_count))
+    str = str.Left(static_cast<size_t>(char_count));
+
+  // UFT16LE_Encode doesn't handle surrogate pairs properly, so it is expected
+  // the number of items to stay the same.
+  ByteString byte_str = str.UTF16LE_Encode();
+  size_t byte_str_len = byte_str.GetLength();
+  int ret_count = byte_str_len / kBytesPerCharacter;
+
+  ASSERT(ret_count <= char_count + 1);  // +1 to account for the NUL terminator.
+  memcpy(result, byte_str.GetBuffer(byte_str_len), byte_str_len);
+  return ret_count;
+}
+
+FPDF_EXPORT int FPDF_CALLCONV FPDFText_CountRects(FPDF_TEXTPAGE text_page,
+                                                  int start,
+                                                  int count) {
+  if (!text_page)
+    return 0;
+
+  CPDF_TextPage* textpage = CPDFTextPageFromFPDFTextPage(text_page);
+  return textpage->CountRects(start, count);
+}
+
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFText_GetRect(FPDF_TEXTPAGE text_page,
+                                                     int rect_index,
+                                                     double* left,
+                                                     double* top,
+                                                     double* right,
+                                                     double* bottom) {
+  if (!text_page)
+    return false;
+
+  CPDF_TextPage* textpage = CPDFTextPageFromFPDFTextPage(text_page);
+  CFX_FloatRect rect;
+  bool result = textpage->GetRect(rect_index, &rect);
+
+  *left = rect.left;
+  *top = rect.top;
+  *right = rect.right;
+  *bottom = rect.bottom;
+  return result;
+}
+
+FPDF_EXPORT int FPDF_CALLCONV FPDFText_GetBoundedText(FPDF_TEXTPAGE text_page,
+                                                      double left,
+                                                      double top,
+                                                      double right,
+                                                      double bottom,
+                                                      unsigned short* buffer,
+                                                      int buflen) {
+  if (!text_page)
+    return 0;
+
+  CPDF_TextPage* textpage = CPDFTextPageFromFPDFTextPage(text_page);
+  CFX_FloatRect rect((float)left, (float)bottom, (float)right, (float)top);
+  WideString str = textpage->GetTextByRect(rect);
+
+  if (buflen <= 0 || !buffer)
+    return str.GetLength();
+
+  ByteString cbUTF16Str = str.UTF16LE_Encode();
+  int len = cbUTF16Str.GetLength() / sizeof(unsigned short);
+  int size = buflen > len ? len : buflen;
+  memcpy(buffer, cbUTF16Str.GetBuffer(size * sizeof(unsigned short)),
+         size * sizeof(unsigned short));
+  cbUTF16Str.ReleaseBuffer(size * sizeof(unsigned short));
+
+  return size;
+}
+
+// Search
+// -1 for end
+FPDF_EXPORT FPDF_SCHHANDLE FPDF_CALLCONV
+FPDFText_FindStart(FPDF_TEXTPAGE text_page,
+                   FPDF_WIDESTRING findwhat,
+                   unsigned long flags,
+                   int start_index) {
+  if (!text_page)
+    return nullptr;
+
+  CPDF_TextPageFind* textpageFind =
+      new CPDF_TextPageFind(CPDFTextPageFromFPDFTextPage(text_page));
+  size_t len = WideString::WStringLength(findwhat);
+  textpageFind->FindFirst(
+      WideString::FromUTF16LE(findwhat, len), flags,
+      start_index >= 0 ? Optional<size_t>(start_index) : Optional<size_t>());
+  return textpageFind;
+}
+
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFText_FindNext(FPDF_SCHHANDLE handle) {
+  if (!handle)
+    return false;
+
+  CPDF_TextPageFind* textpageFind = CPDFTextPageFindFromFPDFSchHandle(handle);
+  return textpageFind->FindNext();
+}
+
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFText_FindPrev(FPDF_SCHHANDLE handle) {
+  if (!handle)
+    return false;
+
+  CPDF_TextPageFind* textpageFind = CPDFTextPageFindFromFPDFSchHandle(handle);
+  return textpageFind->FindPrev();
+}
+
+FPDF_EXPORT int FPDF_CALLCONV
+FPDFText_GetSchResultIndex(FPDF_SCHHANDLE handle) {
+  if (!handle)
+    return 0;
+
+  CPDF_TextPageFind* textpageFind = CPDFTextPageFindFromFPDFSchHandle(handle);
+  return textpageFind->GetCurOrder();
+}
+
+FPDF_EXPORT int FPDF_CALLCONV FPDFText_GetSchCount(FPDF_SCHHANDLE handle) {
+  if (!handle)
+    return 0;
+
+  CPDF_TextPageFind* textpageFind = CPDFTextPageFindFromFPDFSchHandle(handle);
+  return textpageFind->GetMatchedCount();
+}
+
+FPDF_EXPORT void FPDF_CALLCONV FPDFText_FindClose(FPDF_SCHHANDLE handle) {
+  if (!handle)
+    return;
+
+  CPDF_TextPageFind* textpageFind = CPDFTextPageFindFromFPDFSchHandle(handle);
+  delete textpageFind;
+  handle = nullptr;
+}
+
+// web link
+FPDF_EXPORT FPDF_PAGELINK FPDF_CALLCONV
+FPDFLink_LoadWebLinks(FPDF_TEXTPAGE text_page) {
+  if (!text_page)
+    return nullptr;
+
+  CPDF_LinkExtract* pageLink =
+      new CPDF_LinkExtract(CPDFTextPageFromFPDFTextPage(text_page));
+  pageLink->ExtractLinks();
+  return pageLink;
+}
+
+FPDF_EXPORT int FPDF_CALLCONV FPDFLink_CountWebLinks(FPDF_PAGELINK link_page) {
+  if (!link_page)
+    return 0;
+
+  CPDF_LinkExtract* pageLink = CPDFLinkExtractFromFPDFPageLink(link_page);
+  return pdfium::base::checked_cast<int>(pageLink->CountLinks());
+}
+
+FPDF_EXPORT int FPDF_CALLCONV FPDFLink_GetURL(FPDF_PAGELINK link_page,
+                                              int link_index,
+                                              unsigned short* buffer,
+                                              int buflen) {
+  WideString wsUrl(L"");
+  if (link_page && link_index >= 0) {
+    CPDF_LinkExtract* pageLink = CPDFLinkExtractFromFPDFPageLink(link_page);
+    wsUrl = pageLink->GetURL(link_index);
+  }
+  ByteString cbUTF16URL = wsUrl.UTF16LE_Encode();
+  int required = cbUTF16URL.GetLength() / sizeof(unsigned short);
+  if (!buffer || buflen <= 0)
+    return required;
+
+  int size = std::min(required, buflen);
+  if (size > 0) {
+    int buf_size = size * sizeof(unsigned short);
+    memcpy(buffer, cbUTF16URL.GetBuffer(buf_size), buf_size);
+  }
+  return size;
+}
+
+FPDF_EXPORT int FPDF_CALLCONV FPDFLink_CountRects(FPDF_PAGELINK link_page,
+                                                  int link_index) {
+  if (!link_page || link_index < 0)
+    return 0;
+
+  CPDF_LinkExtract* pageLink = CPDFLinkExtractFromFPDFPageLink(link_page);
+  return pdfium::CollectionSize<int>(pageLink->GetRects(link_index));
+}
+
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDFLink_GetRect(FPDF_PAGELINK link_page,
+                                                     int link_index,
+                                                     int rect_index,
+                                                     double* left,
+                                                     double* top,
+                                                     double* right,
+                                                     double* bottom) {
+  if (!link_page || link_index < 0 || rect_index < 0)
+    return false;
+
+  CPDF_LinkExtract* pageLink = CPDFLinkExtractFromFPDFPageLink(link_page);
+  std::vector<CFX_FloatRect> rectArray = pageLink->GetRects(link_index);
+  if (rect_index >= pdfium::CollectionSize<int>(rectArray))
+    return false;
+
+  *left = rectArray[rect_index].left;
+  *right = rectArray[rect_index].right;
+  *top = rectArray[rect_index].top;
+  *bottom = rectArray[rect_index].bottom;
+  return true;
+}
+
+FPDF_EXPORT void FPDF_CALLCONV FPDFLink_CloseWebLinks(FPDF_PAGELINK link_page) {
+  delete CPDFLinkExtractFromFPDFPageLink(link_page);
+}